OPANA ER- oxymorphone hydrochloride tablet, extended release
St Marys Medical Park Pharmacy
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HIGHLIGHTS OF PRESCRIBING INFORMATIONOpana ER 20 mg These highlights do not include all the information needed to use OPANA® ER safely and effectively. See full prescribing information for OPANA® ER. OPANA® ER (oxymorphone hydrochloride) Extended-Release tablets, CII Initial U.S. Approval: 1959
WARNING: POTENTIAL FOR ABUSE, IMPORTANCE OF
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WARNING: POTENTIAL FOR ABUSE, IMPORTANCE OF PROPER PATIENT SELECTION AND LIMITATIONS OF USE
Potential for Abuse
OPANA ER contains oxymorphone, which is a morphine-like opioid agonist and a Schedule II controlled substance, with an abuse liability similar to other opioid analgesics. (
9)
Oxymorphone can be abused in a manner similar to other opioid agonists, legal or illicit. This should be considered when prescribing or dispensing OPANA ER in situations where the physician or pharmacist is concerned about an increased risk of misuse, abuse, or diversion. (
9.2)
Proper Patient Selection
OPANA ER is an extended-release oral formulation of oxymorphone indicated for the management of moderate to severe pain when a continuous, around-the-clock opioid analgesic is needed for an extended period of time. (
1)
Limitations of Use
OPANA ER is NOT intended for use as an as needed analgesic. (
1)
OPANA ER TABLETS are to be swallowed whole and are not to be broken, chewed, dissolved, or crushed. Taking broken, chewed, dissolved, or crushed OPANA ER TABLETS leads to rapid release and absorption of a potentially fatal dose of oxymorphone. (
2)
Patients must not consume alcoholic beverages, or prescription or non-prescription medications containing alcohol, while on OPANA ER therapy. The co-ingestion of alcohol with OPANA ER may result in increased plasma levels and a potentially fatal overdose of oxymorphone. ( 2)
1 INDICATIONS AND USAGE
OPANA ER is indicated for the relief of moderate to severe pain in patients requiring continuous, around-the-clock opioid treatment for an extended period of time.
Limitations of Usage
OPANA ER is not intended for use as an as needed analgesic.
OPANA ER is not indicated for pain in the immediate post-operative period if the pain is mild, or not expected to persist for an extended period of time.
OPANA ER is only indicated for post-operative use if the patient is already receiving the drug prior to surgery or if the post-operative pain is expected to be moderate or severe and persist for an extended period of time. Physicians should individualize treatment, moving from parenteral to oral analgesics as appropriate. (See American Pain Society guidelines).
2 DOSAGE AND ADMINISTRATION
2.1 Safe Administration Instructions
OPANA ER tablets are to be swallowed whole and are not to be broken, chewed, dissolved, or crushed. Taking broken, chewed, dissolved, or crushed OPANA ER TABLETS leads to rapid release and absorption of a potentially fatal dose of oxymorphone.
Patients must not consume alcoholic beverages, or prescription or non-prescription medications containing alcohol, while on OPANA ER therapy. The co-ingestion of alcohol with OPANA ER may result in increased plasma levels and a potentially fatal overdose of oxymorphone.
While symmetric (same dose AM and PM), around-the-clock, every 12 hours dosing is appropriate for the majority of patients, some patients may benefit from asymmetric (different dose given in AM than in PM) dosing, tailored to their pain pattern. It is usually appropriate to treat a patient with only one extended-release opioid for around-the-clock therapy.
Selection of patients for treatment with OPANA ER should be governed by the same principles that apply to the use of other extended-release opioid analgesics [see Indications and Usage (1)]. Physicians should individualize treatment in every case, using non-opioid analgesics, opioids on an as needed basis, combination products, and chronic opioid therapy in a progressive plan of pain management such as outlined by the World Health Organization, the American Pain Society and the Federation of State Medical Boards Model Guidelines. Healthcare professionals should follow appropriate pain management principles of careful assessment and ongoing monitoring [see Boxed Warning].
2.2 Initiating Therapy with OPANA ER It is necessary to adjust the dosing regimen for each patient individually, taking into account the patient’s prior analgesic treatment experience. In the selection of the initial dose of OPANA ER, attention should be given to the following:
- total daily dose, potency and specific characteristics of the opioid the patient has been taking previously;
- relative potency estimate used to calculate the equivalent oxymorphone dose needed;
- patient’s degree of opioid tolerance;
- age, general condition, and medical status of the patient;
- concurrent non-opioid analgesics and other medications;
- type and severity of the patient’s pain;
- balance between pain control and adverse experiences;
- risk factors for abuse or addiction, including a prior history of abuse or addiction.
Once therapy is initiated, frequently assess pain relief and other opioid effects. Base the titration of the total daily OPANA ER dose upon the amount of supplemental opioid utilization, severity of the patient’s pain, and the patient’s ability to tolerate the opioid. Titrate dose to generally mild or no pain with the regular use of no more than two doses of supplemental analgesia, i.e. “rescue,” per 24 hours. Patients who experience breakthrough pain may require dosage adjustment.
If signs of excessive opioid-related adverse experiences are observed, the next dose may be reduced. If this adjustment leads to inadequate analgesia, a supplemental dose of an immediate-release opioid, or a non-opioid analgesic may be administered. Adjust dosing to obtain an appropriate balance between pain relief and opioid-related adverse experiences. If significant adverse events occur before the therapeutic goal of mild or no pain is achieved, the events should be treated aggressively. Once adverse events are adequately managed, continue upward titration to an acceptable level of pain control.
During periods of changing analgesic requirements, including initial titration, frequent contact is recommended between physician, other members of the healthcare team, the patient and the caregiver/family. Advise patients and caregivers/family members of the potential adverse reactions.
The dosing recommendations below, therefore, can only be considered as suggested approaches to what is actually a series of clinical decisions over time in the management of the pain of each individual patient.
Titrate dose to adequate pain relief (generally mild or no pain).
Administer OPANA ER on an empty stomach, at least one hour prior to or two hours after eating [see
Clinical Pharmacology (12.3)].
Opioid-Naïve Patients
The initial dose for patients who are not opioid-experienced and who are being initiated on chronic around-the-clock opioid therapy with OPANA ER is 5 mg every 12 hours. Thereafter, titrate the dose individually at increments of 5-10 mg every 12 hours every 3-7 days, to a level that provides adequate analgesia and minimizes side effects under the close supervision of the prescribing physician.
Opioid-Experienced Patients
Conversion from OPANA to OPANA ER
Patients receiving OPANA may be converted to OPANA ER by administering half the patient's total daily oral OPANA dose as OPANA ER, every 12 hours.
Conversion from Parenteral Oxymorphone to OPANA ER
Given OPANA ER’s absolute oral bioavailability of approximately 10%, patients receiving parenteral oxymorphone may be converted to OPANA ER by administering 10 times the patient's total daily parenteral oxymorphone dose as OPANA ER in two equally divided doses (e.g., [IV dose x 10] divided by 2). Due to patient variability with regards to opioid analgesic response, upon conversion monitor patients closely to evaluate for adequate analgesia and side effects.
Conversion from Other Oral Opioids to OPANA ER
For conversion from other opioids to OPANA ER, physicians and other healthcare professionals are advised to refer to published relative potency information, keeping in mind that conversion ratios are only approximate. In general, it is safest to start the OPANA ER therapy by administering half of the calculated total daily dose of OPANA ER (see conversion ratio table below) in 2 divided doses, every 12 hours. Gradually adjust the initial dose of OPANA ER until adequate pain relief and acceptable side effects have been achieved.
The following table provides approximate equivalent doses, which may be used as a guideline for conversion. The conversion ratios and approximate equivalent doses in this conversion table are only to be used for the conversion from current opioid therapy to OPANA ER. In a Phase 3 clinical trial with an open-label titration period, patients were converted from their current opioid to OPANA ER using the following table as a guide. There is substantial patient variation in the relative potency of different opioid drugs and formulations.
| CONVERSION RATIOS TO OPANA ER
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| Approximate Equivalent Dose
| Oral
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Opioid
| Oral
| Conversion Ratioa
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Oxymorphone
| 10 mg
| 1
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Hydrocodone
| 20 mg
| 0.5
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Oxycodone
| 20 mg
| 0.5
|
Methadone b
| 20 mg
| 0.5
|
Morphine
| 30 mg
| 0.333
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aRatio for conversion of oral opioid dose to approximate oxymorphone equivalent dose. Select opioid and multiply the dose by the conversion ratio to calculate the approximate oral oxymorphone equivalent.
- The conversion ratios and approximate equivalent doses in this conversion table are only to be used for the conversion from current opioid therapy to OPANA ER. - Sum the total daily dose for the opioid and multiply by the conversion ratio to calculate the oxymorphone total daily dose. - For patients on a regimen of mixed opioids, calculate the approximate oral oxymorphone dose for each opioid and sum the totals to estimate the total daily oxymorphone dose. - The dose of OPANA ER can be gradually adjusted, preferably at increments of 10 mg every 12 hours every 3-7 days, until adequate pain relief and acceptable side effects have been achieved [see Dosage and Administration (2.1)]. b It is extremely important to monitor all patients closely when converting from methadone to other opioid agonists. The ratio between methadone and other opioid agonists may vary widely as a function of previous dose exposure. Methadone has a long half-life and tends to accumulate in the plasma. |
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No dose adjustment for CYP 3A4- or 2C9-mediated drug-drug interactions is required [see
Clinical Pharmacology (12.3)].
2.3 Patients with Hepatic Impairment
Start patients with mild hepatic impairment with the lowest dose and titrate slowly while carefully monitoring side effects. OPANA ER is contraindicated in patients with moderate or severe hepatic impairment [see
Warnings and Precautions (5.7) and
Clinical Pharmacology (12.3)].
2.4 Patients with Renal Impairment
There are 57% and 65% increases in oxymorphone bioavailability in patients with moderate and severe renal impairment, respectively [see
Clinical Pharmacology (12.3)]. Accordingly, in patients with creatinine clearance rates less than 50 mL/min, start OPANA ER with the lowest dose and titrate slowly while carefully monitoring side effects.
2.5 Use with Central Nervous System Depressants In patients who are concurrently receiving other central nervous system (CNS) depressants including sedatives or hypnotics, general anesthetics, phenothiazines, tranquilizers, and alcohol, start OPANA ER at 1/3 to 1/2 of the usual dose because respiratory depression, hypotension, and profound sedation, coma or death may result [see
Warnings and Precautions (5.4) and
Drug Interactions (7.2)].
Although no specific interaction between oxymorphone and monoamine oxidase inhibitors has been observed, OPANA ER is not recommended for use in patients who have received MAO inhibitors within 14 days [see
Drug Interactions (7.6)].
2.6 Geriatrics Patients
The steady-state plasma concentrations of oxymorphone are approximately 40% higher in elderly subjects than in young subjects. Exercise caution in the selection of the starting dose of OPANA ER for an elderly patient by starting at the low end of the dosing range and slowly titrating to adequate analgesia [see
Clinical Pharmacology (12.3) and
Use in Specific Populations (8.5)].
2.7 Maintenance of Therapy
During chronic therapy with OPANA ER, periodically reassess the continued need for around-the-clock opioid therapy. Continue to assess patients for their clinical risks for opioid abuse, addiction, or diversion particularly with high-dose formulations. If patients need to titrate while on maintenance therapy, follow the same method outlined in Initiating Therapy with OPANA ER.
2.8 Cessation of Therapy
When the patient no longer requires therapy with OPANA ER tablets, gradually taper doses to prevent signs and symptoms of withdrawal in the physically dependent patient.
3 DOSAGE FORMS AND STRENGTHS
The 5 mg dosage form is a pink, octagon shape, film coated, convex extended-release tablets debossed with “5” on one side and plain on the other.
The 7.5 mg dosage form is a gray, octagon shape, film coated, convex extended-release tablets debossed with “7 ½” on one side and plain on the other.
The 10 mg dosage form is a light orange, octagon shape, film coated, convex extended-release tablets debossed with “10” on one side and plain on the other.
The 15 mg dosage form is a white, octagon shape, film coated, convex extended-release tablets debossed with “15” on one side and plain on the other.
The 20 mg dosage form is a light green, octagon shape, film coated, convex extended-release tablets debossed with “20” on one side and plain on the other.
The 30 mg dosage form is a red, octagon shape, film coated, convex extended-release tablets debossed with “30” on one side and plain on the other.
The 40 mg dosage form is a yellow, octagon shape, film coated, convex extended-release tablets debossed with “40” on one side and plain on the other.
4 CONTRAINDICATIONS
OPANA ER is contraindicated in patients who have:
- significant respiratory depression
- or are suspected of having paralytic ileus
- acute or severe bronchial asthma or hypercarbia
- moderate and severe hepatic impairment [see
Clinical Pharmacology (12.3),
Warnings and Precautions (5.7),].
- known hypersensitivity to any of its components or the active ingredient, oxymorphone or with known hypersensitivity to morphine analogs such as codeine.
5 WARNINGS AND PRECAUTIONS
5.1 Information Essential for Safe Administration
OPANA ER tablets are to be swallowed whole, and are not to be broken, chewed, crushed or dissolved. Taking broken, chewed, crushed or dissolved OPANA ER tablets could lead to the rapid release and absorption of a potentially fatal dose of oxymorphone [see
Boxed Warning].
Patients must not consume alcoholic beverages, or prescription or non-prescription medications containing alcohol, while on OPANA ER therapy. The co-ingestion of alcohol with OPANA ER may result in increased plasma levels and a potentially fatal overdose of oxymorphone [see
Pharmacokinetics (12.3)].
Instruct patients against use by individuals other than the patient for whom OPANA ER was prescribed, as such inappropriate use may have severe medical consequences, including death.
5.2 Respiratory Depression
Respiratory depression is the chief hazard of OPANA ER. Respiratory depression is a potential problem in elderly or debilitated patients as well as in those suffering from conditions accompanied by hypoxia or hypercapnia when even moderate therapeutic doses may dangerously decrease pulmonary ventilation.
Administer OPANA ER with extreme caution to patients with conditions accompanied by hypoxia, hypercapnia, or decreased respiratory reserve such as: asthma, chronic obstructive pulmonary disease or cor pulmonale, severe obesity, sleep apnea syndrome, myxedema, kyphoscoliosis, CNS depression or coma. In these patients, even usual therapeutic doses of oxymorphone may decrease respiratory drive while simultaneously increasing airway resistance to the point of apnea. Consider alternative non-opioid analgesics and use OPANA ER only under careful medical supervision at the lowest effective dose in such patients.
5.3 Misuse, Abuse and Diversion of Opioids
OPANA ER contains oxymorphone, a mu opioid agonist and a Schedule II controlled substance with an abuse liability similar to morphine. Opioid agonists are sought by drug abusers and people with addiction disorders and are subject to criminal diversion.
Oxymorphone can be abused in a manner similar to other opioid agonists, legal or illicit. This issue should be considered when prescribing or dispensing oxymorphone in situations where the physician or pharmacist is concerned about an increased risk of misuse, abuse, or diversion.
OPANA ER tablets may be abused by crushing, chewing, snorting or injecting the product. These practices will result in the uncontrolled delivery of the opioid and pose a significant risk to the abuser that could result in overdose and death [see
Drug Abuse and Dependence (9)].
OPANA ER may be targeted for theft and diversion. Healthcare professionals should contact their State Medical Board, State Board of Pharmacy, or State Control Board for information on how to detect or prevent diversion of this product, and security requirements for storing and handling of OPANA ER.
Healthcare professionals should advise patients to store OPANA ER in a secure place, preferably locked and out of the reach of children and other non-caregivers.
Concerns about abuse, misuse, diversion and addiction should not prevent the proper management of pain.
5.4 Interactions with Alcohol and other CNS Depressants
Patients receiving other opioid analgesics, general anesthetics, phenothiazines or other tranquilizers, sedatives, hypnotics, or other CNS depressants (including alcohol) concomitantly with oxymorphone may experience respiratory depression, hypotension, profound sedation, coma and death [see
Drug Interactions (7.2) ]. Avoid concurrent use of alcohol and OPANA ER [see
Pharmacokinetics (12.3)].
5.5 Use in Patients with Head Injury and Increased Intracranial Pressure
In the presence of head injury, intracranial lesions or a preexisting increase in intracranial pressure, the possible respiratory depressant effects of opioid analgesics and their potential to elevate cerebrospinal fluid pressure (resulting from vasodilation following CO2 retention) may be markedly exaggerated. Furthermore, opioid analgesics can produce effects on papillary response and consciousness, which may obscure neurologic signs of further increases in intracranial pressure in patients with head injuries.
Administer OPANA ER with extreme caution to patients who may be particularly susceptible to the intracranial effects of CO2 retention, such as those with evidence of increased intracranial pressure or impaired consciousness. Opioids may obscure the clinical course of a patient with a head injury and should be used only if clinically warranted.
5.6 Hypotensive Effect
OPANA ER may cause severe hypotension in a patient whose ability to maintain blood pressure has been compromised by a depleted blood volume, or after concurrent administration with drugs such as phenothiazines or other agents that compromise vasomotor tone. Administer OPANA ER with caution to patients in circulatory shock, since vasodilation produced by the drug may further reduce cardiac output and blood pressure.
5.7 Hepatic Impairment
A study of OPANA ER in patients with hepatic disease indicated greater plasma concentrations than those with normal hepatic function [See
Clinical Pharmacology (12)]. Use OPANA ER with caution in patients with mild impairment, starting with the lowest dose and titrating slowly while carefully monitoring for side effects [see
Dosage and Administration (2.3)]. OPANA ER is contraindicated in patients with moderate or severe hepatic impairment.
5.8 Special Risk Groups
Use OPANA ER with caution in the following conditions: adrenocortical insufficiency (e.g., Addison's disease), prostatic hypertrophy or urethral stricture, severe impairment of pulmonary or renal function, and toxic psychosis.
Opioids may aggravate convulsions in patients with convulsive disorders, and may induce or aggravate seizures in some clinical settings.
5.9 Gastrointestinal Effects
OPANA ER decreases bowel motility. Opioids diminish propulsive peristaltic waves in the gastrointestinal tract. Monitor for decreased bowel motility in post-operative patients receiving opioids. The administration of OPANA ER may obscure the diagnosis or clinical course in patients with acute abdominal conditions. OPANA ER is contraindicated in patients with paralytic ileus.
5.10 Ambulatory Surgery and Post-Operative Use
OPANA ER is not indicated for pre-emptive analgesia (administration pre-operatively for the management of post-operative pain).
OPANA ER is only indicated for postoperative use in the patient if the patient is already receiving the drug prior to surgery or if the postoperative pain is expected to be moderate to severe and persist for an extended period of time. Physicians should individualize treatment, moving from parenteral to oral analgesics as appropriate (see American Pain Society guidelines).
Patients who are already receiving OPANA ER as part of ongoing analgesic therapy may be safely continued on the drug if appropriate dosage adjustments are made considering the procedure, other drugs given, and the temporary changes in physiology caused by the surgical intervention.
5.11 Use in Pancreatic/Biliary Tract Disease
OPANA ER, like other opioids, may cause spasm of the sphincter of Oddi and should be used with caution in patients with biliary tract disease, including acute pancreatitis.
5.12 Driving and Operating Machinery
Opioid analgesics impair the mental and physical abilities needed to perform potentially hazardous activities such as driving a car or operating machinery.
6 ADVERSE REACTIONS
The following serious adverse reactions are discussed elsewhere in the labeling:
- Respiratory depression [see
Warnings and Precautions (5.2)]
- Misuse and abuse [see
Warning and Precautions (5.3) and
Drug Abuse and Dependence (9)]
- CNS depressant effects [see
Warnings and Precautions (5.4)]
6.1 Clinical Trial Experience
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice.
The safety of OPANA ER was evaluated in a total of 2011 patients in controlled clinical trials. The clinical trials consisted of patients with moderate to severe chronic non-malignant pain, cancer pain, and post surgical pain.
Tables 1 and 2 list the most frequently occurring adverse reactions (in at least 5% of patients) from the placebo-controlled trials in patients with low back pain.
| Open-Label Titration Period
| Double-Blind Treatment Period
|
|
| OPANA ER
| OPANA ER
| Placebo
|
Preferred Term
| (N = 325)
| (N = 105)
| (N = 100)
|
Constipation
| 26%
| 7%
| 1%
|
Somnolence
| 19%
| 2%
| 0%
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Nausea
| 18%
| 11%
| 9%
|
Dizziness
| 11%
| 5%
| 3%
|
Headache
| 11%
| 4%
| 2%
|
Pruritus
| 7%
| 3%
| 1%
|
| Open-Label Titration Period
| Double-Blind Treatment Period
|
|
| OPANA ER
| OPANA ER
| Placebo
|
Preferred Term
| (N = 250)
| (N = 70)
| (N = 72)
|
Nausea
| 20%
| 3%
| 1%
|
Constipation
| 12%
| 6%
| 1%
|
Headache
| 12%
| 3%
| 0%
|
Somnolence
| 11%
| 3%
| 0%
|
Vomiting
| 9%
| 0%
| 1%
|
Pruritus
| 8%
| 0%
| 0%
|
Dizziness
| 6%
| 0%
| 0%
|
The following table lists adverse reactions that were reported in at least 2% of patients in placebo-controlled trials (N=5).
MedDRA Preferred Term
| OPANA ER (N=1259)
| Placebo (N=461)
|
Nausea
| 33%
| 13%
|
Constipation
| 28%
| 13%
|
Dizziness (Excl Vertigo)
| 18%
| 8%
|
Somnolence
| 17%
| 2%
|
Vomiting
| 16%
| 4%
|
Pruritus
| 15%
| 8%
|
Headache
| 12%
| 6%
|
Sweating increased
| 9%
| 9%
|
Dry mouth
| 6%
| less than 1%
|
Sedation
| 6%
| 8%
|
Diarrhea
| 4%
| 6%
|
Insomnia
| 4%
| 2%
|
Fatigue
| 4%
| 1%
|
Appetite decreased
| 3%
| less than 1%
|
Abdominal pain
| 3%
| 2%
|
The common (greater than or equal to 1% to less than 10%) adverse drug reactions reported at least once by patients treated with OPANA ER in the clinical trials organized by MedDRA’s (Medical Dictionary for Regulatory Activities) System Organ Class and not represented in Table 1 were:
Eye disorders: vision blurred
Gastrointestinal disorders: diarrhea, abdominal pain, dyspepsia
General disorders and administration site conditions: dry mouth, appetite decreased, fatigue, lethargy, weakness, pyrexia, dehydration, weight decreased, edema
Nervous system disorders: insomnia
Psychiatric disorders: anxiety, confusion, disorientation, restlessness, nervousness, depression
Respiratory, thoracic and mediastinal disorders: dyspnea
Vascular disorders: flushing and hypertension
Other less common adverse reactions known with opioid treatment that were seen less than 1% in the OPANA ER trials include the following: Bradycardia, palpitation, syncope, tachycardia, postural hypotension, miosis, visual disturbance, abdominal distention, ileus, feeling jittery, hot flashes, allergic reactions, hypersensitivity, urticaria, oxygen saturation decreased, central nervous system depression, depressed level of consciousness, agitation, dysphoria, euphoric mood, hallucination, mental impairment, mental status changes, difficult micturition, urinary retention, hypoxia, respiratory depression, respiratory distress, respiratory rate decreased, clamminess, dermatitis, hypotension.
7 DRUG INTERACTIONS
7.1 Drug-Drug Interactions
Oxymorphone is highly metabolized principally in the liver and undergoes reduction or conjugation with glucuronic acid to form both active and inactive metabolites [see
Pharmacokinetics (12.3)]). Clinical drug interaction studies with OPANA ER showed no induction of CYP450 3A4 or 2C9 enzyme activity, indicating that no dose adjustment for CYP 3A4- or 2C9-mediated drug-drug interactions is required [see
Clinical Pharmacology (12.3)].
7.2 Use with CNS Depressants
The concomitant use of other CNS depressants including sedatives, hypnotics, tranquilizers, general anesthetics, phenothiazines, other opioids, and alcohol may produce additive CNS depressant effects. OPANA ER should be started at 1/3 to 1/2 of the usual dose in patients who are concurrently receiving other central nervous system depressants because respiratory depression, hypotension, and profound sedation, coma and death may result, and titrated slowly as necessary for adequate pain relief.
When combined therapy with any of the above medications is considered, the dose of one or both agents should be reduced [see
Dosage and Administration (2.5) and
Warnings and Precautions (5.4)].
7.3 Interactions with Mixed Agonist/Antagonist Opioid Analgesics
Agonist/antagonist analgesics (i.e., pentazocine, nalbuphine, butorphanol, or buprenorphine) should be administered with caution to a patient who has received or is receiving a course of therapy with a pure opioid agonist analgesic, such as oxymorphone. In this situation, mixed agonist/antagonist analgesics may reduce the analgesic effect of oxymorphone and/or may precipitate withdrawal symptoms.
7.4 Cimetidine
CNS side effects have been reported (e.g., confusion, disorientation, respiratory depression, apnea, seizures) following coadministration of cimetidine with opioid analgesics; a causal relationship has not been established.
7.5 Anticholinergics
Anticholinergics or other medications with anticholinergic activity when used concurrently with opioid analgesics may result in increased risk of urinary retention and/or severe constipation, which may lead to paralytic ileus.
7.6 MAO Inhibitors
OPANA ER is not recommended for use in patients who have received MAO inhibitors within 14 days, because severe and unpredictable potentiation by MAO inhibitors has been reported with opioid analgesics. No specific interaction between oxymorphone and MAO inhibitors has been observed, but caution in the use of any opioid in patients taking this class of drugs is appropriate.
8 USE IN SPECIFIC POPULATIONS
8.1 Pregnancy
The safety of using oxymorphone in pregnancy has not been established with regard to possible adverse effects on fetal development. The use of OPANA ER in pregnancy, in nursing mothers, or in women of child-bearing potential requires that the possible benefits of the drug be weighed against the possible hazards to the mother and the child.
Prolonged use of opioid analgesics during pregnancy may cause fetal-neonatal physical dependence.
Teratogenic Effects
Pregnancy Category C
There are no adequate and well-controlled studies of oxymorphone in pregnant women. OPANA ER should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus [see
Use in Specific Populations (8.2)].
Oxymorphone hydrochloride administration did not cause malformations at any doses evaluated during developmental toxicity studies in rats (less than or equal to 25 mg/kg/day) or rabbits (less than or equal to 50 mg/kg/day). These doses are 3-fold and 12-fold the human dose of 40 mg every 12 hours, based on body surface area. There were no developmental effects in rats treated with 5 mg/kg/day or rabbits treated with 25 mg/kg/day. Fetal weights were reduced in rats and rabbits given doses of greater than or equal to 10 mg/kg/day and 50 mg/kg/day, respectively. These doses are 1.2-fold and 12-fold the human dose of 40 mg every 12 hours based on body surface area, respectively. There were no effects of oxymorphone hydrochloride on intrauterine survival in rats at doses less than or equal to 25 mg/kg/day, or rabbits at less than or equal to 50 mg/kg/day in these studies (see Non-teratogenic Effects, below). In a study that was conducted prior to the establishment of Good Laboratory Practices (GLP) and not according to current recommended methodology, a single subcutaneous injection of oxymorphone hydrochloride on gestation day 8 was reported to produce malformations in offspring of hamsters that received 15.5-fold the human dose of 40 mg every 12 hours based on body surface area. This dose also produced 20% maternal lethality.
Non-teratogenic Effects
Oxymorphone hydrochloride administration to female rats during gestation in a pre- and postnatal developmental toxicity study reduced mean litter size (18%) at a dose of 25 mg/kg/day, attributed to an increased incidence of stillborn pups. An increase in neonatal death occurred at greater than or equal to 5 mg/kg/day. Post-natal survival of the pups was reduced throughout weaning following treatment of the dams with 25 mg/kg/day. Low pup birth weight and decreased postnatal weight gain occurred in pups born to oxymorphone-treated pregnant rats given a dose of 25 mg/kg/day. This dose is ~ 3-fold higher than the human dose of 40 mg every 12 hours on a body surface area basis.
8.2 Labor and Delivery
Opioids cross the placenta and may produce respiratory depression in neonates. OPANA ER is not recommended for use in women during and immediately prior to labor, when use of shorter acting analgesics or other analgesic techniques are more appropriate. Occasionally, opioid analgesics may prolong labor through actions which temporarily reduce the strength, duration and frequency of uterine contractions. However this effect is not consistent and may be offset by an increased rate of cervical dilatation, which tends to shorten labor.
Neonates whose mothers received opioid analgesics during labor should be observed closely for signs of respiratory depression. A specific opioid antagonist, such as naloxone or nalmefene, should be available for reversal of opioid-induced respiratory depression in the neonate.
Upon delivery from a mother who received opioids for a long period of time, neonatal withdrawal may occur. Symptoms usually appear during the first days of life and may include convulsions, irritability, excessive crying, tremors, hyperactive reflexes, fever, vomiting, diarrhea, sneezing, yawning, and increased respiratory rate.
8.3 Nursing Mothers
It is not known whether oxymorphone is excreted in human milk. Because many drugs, including some opioids, are excreted in human milk, caution should be exercised when OPANA ER is administered to a nursing woman. Infants exposed to OPANA ER through breast milk should be monitored for excess sedation and respiratory depression. Withdrawal symptoms can occur in breast-fed infants when maternal administration of an opioid analgesic is stopped, or when breast-feeding is stopped.
8.4 Pediatric Use
Safety and effectiveness of OPANA ER in pediatric patients below the age of 18 years have not been established.
8.5 Geriatric Use
OPANA ER should be used with caution in elderly patients [see
Clinical Pharmacology 12.3)].
Of the total number of subjects in clinical studies of OPANA ER, 27% were 65 and over, while 9% were 75 and over. No overall differences in effectiveness were observed between these subjects and younger subjects. There were several adverse events that were more frequently observed in subjects 65 and over compared to younger subjects. These adverse events included dizziness, somnolence, confusion, and nausea.
8.6 Hepatic Impairment
In a PK study of OPANA ER, patients with mild hepatic impairment were shown to have an increase in bioavailability of 1.6 fold. Use OPANA ER with caution in patients with mild impairment. Start these patients on the lowest dose and titrate slowly while carefully monitoring for side effects. OPANA ER is contraindicated for patients with moderate and severe hepatic impairment [see
Contraindications (4),
Warnings and Precautions (5.7), and
Dosage and Administration (2.3)].
8.7 Renal Impairment
In a PK study of OPANA ER, patients with moderate to severe renal impairment were shown to have an increase in bioavailability ranging from 57-65% [see
Clinical Pharmacology (12.3)]. Start these patients with the lowest dose of OPANA ER and titrate slowly while monitored for side effects [see
Dosage and Administration (2.4)].
9 DRUG ABUSE AND DEPENDENCE
9.1 Controlled Substance
OPANA ER contains oxymorphone, a mu opioid agonist and a Schedule II controlled substance with an abuse liability similar to morphine and other opioids. Oxymorphone can be abused and is subject to criminal diversion [see
Warning and Precautions (5.3)].
9.2 Abuse
All patients treated with opioids require careful monitoring for signs of abuse and addiction, since use of opioid analgesic products carries the risk of addiction even under appropriate medical use. Addiction is a primary, chronic, neurobiologic disease, with genetic, psychosocial, and environmental factors influencing its development and manifestations. Addiction is characterized by one or more of the following: impaired control over drug use, compulsive use, use for non-medical purposes, and continued use despite harm. Drug addiction is a treatable disease, utilizing a multidisciplinary approach, but relapse is common.
"Drug seeking" behavior is very common to addicts and drug abusers. Drug-seeking tactics include emergency calls or visits near the end of office hours, refusal to undergo appropriate examination, testing or referral, repeated claims of loss of prescriptions, tampering with prescriptions and reluctance to provide prior medical records or contact information for other treating physician(s). “Doctor shopping” (visiting multiple prescribers) to obtain additional prescriptions is common among drug abusers and people suffering from untreated addiction. Preoccupation with achieving adequate pain relief can be appropriate behavior in a patient with poor pain control.
Abuse and addiction are separate and distinct from physical dependence and tolerance. Physicians should be aware that addiction may not be accompanied by concurrent tolerance and symptoms of physical dependence in all addicts. In addition, abuse of opioids can occur in the absence of true addiction and is characterized by misuse for non-medical purposes, often in combination with other psychoactive substances. OPANA ER, like other opioids, may be diverted for non-medical use. Careful record-keeping of prescribing information, including quantity, frequency, and renewal requests is strongly advised.
OPANA ER is intended for oral use only. Abuse of OPANA ER poses a risk of overdose and death. This risk is increased with concurrent abuse of OPANA ER with alcohol and other substances. Parenteral drug abuse is commonly associated with transmission of infectious disease such as hepatitis and HIV.
Proper assessment of the patient, proper prescribing practices, periodic re-evaluation of therapy, and proper dispensing and storage are appropriate measures that help to limit abuse of opioid drugs.
9.3 Dependence
Opioid analgesics may cause physical dependence. Physical dependence results in withdrawal symptoms after abrupt discontinuation of a drug or upon administration of an opioid antagonist or mixed opioid agonist/antagonist agent. Withdrawal also may be precipitated through the administration of drugs with opioid antagonist activity, e.g., naloxone, nalmefene, or mixed agonist/antagonist analgesics (pentazocine, butorphanol, buprenorphine, nalbuphine). Physical dependence may not occur to a clinically significant degree until after several days to weeks of continued opioid usage.
Tolerance is the need for increasing doses of opioids to maintain a defined effect such as analgesia (in the absence of disease progression or other external factors). The development of physical dependence and tolerance is not unusual during chronic opioid therapy.
OPANA ER should not be abruptly discontinued [see
Dosage and Administration (2.8)]. If OPANA ER is abruptly discontinued in a physically-dependent patient, an abstinence syndrome may occur. Some or all of the following can characterize this syndrome: restlessness, lacrimation, rhinorrhea, yawning, perspiration, chills, myalgia, and mydriasis. Other symptoms also may develop, including: irritability, anxiety, backache, joint pain, weakness, abdominal cramps, insomnia, nausea, anorexia, vomiting, diarrhea, or increased blood pressure, respiratory rate, or heart rate.
Infants born to mothers physically dependent on opioids will also be physically dependent and may exhibit respiratory difficulties and withdrawal symptoms [see
Use in Specific Populations (8.1,
8.2)].
10 OVERDOSAGE
10.1 Symptoms
Acute overdosage with OPANA ER is characterized by respiratory depression (a decrease in respiratory rate and/or tidal volume, Cheyne-Stokes respiration, cyanosis), extreme somnolence progressing to stupor or coma, skeletal muscle flaccidity, cold and clammy skin, constricted pupils and sometimes bradycardia and hypotension. In some cases, apnea, circulatory collapse, cardiac arrest and death may occur.
OPANA ER may cause miosis, even in total darkness. Pinpoint pupils are a sign of opioid overdose but are not pathognomonic (e.g., pontine lesions of hemorrhagic or ischemic origin may produce similar findings). Marked mydriasis rather than miosis may be seen with hypoxia in overdose situations [see
Clinical Pharmacology (12.2)].
10.2 Treatment
In the treatment of OPANA ER overdosage, primary attention should be given to the re-establishment of a patent airway and institution of assisted or controlled ventilation. Supportive measures (including oxygen and vasopressors) should be employed in the management of circulatory shock and pulmonary edema accompanying overdose as indicated. Cardiac arrest or arrhythmias may require cardiac massage or defibrillation.
The opioid antagonist naloxone hydrochloride is a specific antidote against respiratory depression that may result from overdosage or unusual sensitivity to opioids including OPANA ER. Nalmefene is an alternative pure opioid antagonist, which may be administered as a specific antidote to respiratory depression resulting from opioid overdose. Since the duration of action of OPANA ER may exceed that of the antagonist, keep the patient under continued surveillance and administer repeated doses of the antagonist according to the antagonist labeling as needed to maintain adequate respiration.
In patients receiving OPANA ER, opioid antagonists should not be administered in the absence of clinically significant respiratory or circulatory depression. Administer opioid antagonists cautiously to persons who are known, or suspected to be, physically dependent on any opioid agonist including OPANA ER. In such cases, an abrupt or complete reversal of opioid effects may precipitate an acute abstinence syndrome. In an individual physically dependent on opioids, administration of the usual dose of the antagonist will precipitate an acute withdrawal syndrome. The severity of the withdrawal syndrome produced will depend on the degree of physical dependence and the dose of the antagonist administered. If respiratory depression is associated with muscular rigidity, administration of a neuromuscular blocking agent may be necessary to facilitate assisted or controlled ventilation. Muscular rigidity may also respond to opioid antagonist therapy.
11 DESCRIPTION
OPANA ER (oxymorphone hydrochloride) extended-release is a semi-synthetic opioid analgesic supplied in 5 mg, 7.5 mg, 10 mg, 15 mg, 20 mg, 30 mg, and 40 mg tablet strengths for oral administration. The tablet strength describes the amount of oxymorphone hydrochloride per tablet. The tablets contain the following inactive ingredients: hypromellose, methylparaben, silicified microcrystalline cellulose, sodium stearyl fumarate, TIMERx-N, titanium dioxide, and triacetin. The 5 mg, 10 mg, 15 mg, 20 mg, and 30 mg tablets also contain macrogol, and polysorbate 80. In addition, the 5 mg, 7.5 mg and 30 mg tablets contain iron oxide red. The 7.5 mg tablets contain iron oxide black, and iron oxide yellow. The 10 mg tablets contain FDandC yellow No. 6. The 20 mg tablets contain FDandC blue No. 1, FDandC yellow No. 6, and DandC yellow No. 10. The 40 mg tablets contain FDandC yellow No. 6, DandC yellow No. 10, and lactose monohydrate.
Chemically, oxymorphone hydrochloride is 4, 5-epoxy-3, 14-dihydroxy-17-methylmorphinan-6-one hydrochloride, a white or slightly off-white, odorless powder, which is sparingly soluble in alcohol and ether, but freely soluble in water. The molecular weight of oxymorphone hydrochloride is 337.80. The pKa1 and pKa2 of oxymorphone at 37°C are 8.17 and 9.54, respectively. The octanol/aqueous partition coefficient at 37°C and pH 7.4 is 0.98.
The structural formula for oxymorphone hydrochloride is as follows:
12 CLINICAL PHARMACOLOGY
12.1 Mechanism of Action
Oxymorphone, a pure opioid agonist, is relatively selective for the mu receptor, although it can interact with other opioid receptors at higher doses.
The precise mechanism of analgesia, the principal therapeutic action of oxymorphone, is unknown. Specific central nervous system (CNS) opiate receptors and endogenous compounds with morphine-like activity have been identified throughout the brain and spinal cord and are likely to play a role in the expression and perception of analgesic effects. In addition, opioid receptors have also been identified within the peripheral nervous system (PNS). The role that these receptors play in these drugs’ analgesic effects is unknown.
12.2 Pharmacodynamics
Concentration-Efficacy Relationships
The minimum effective plasma concentration of oxymorphone for analgesia varies widely among patients, especially among patients who have been previously treated with agonist opioids. As a result, individually titrate patients to achieve a balance between therapeutic and adverse effects. The minimum effective analgesic concentration of oxymorphone for any individual patient may increase over time due to an increase in pain, progression of disease, development of a new pain syndrome and/or potential development of analgesic tolerance.
Concentration-Adverse Experience Relationships
There is a general relationship between increasing opioid plasma concentration and increasing frequency of adverse experiences such as nausea, vomiting, CNS effects, and respiratory depression.
As with all opioids, the dose of OPANA ER must be individualized [see
Dosage and Administration (2.1)]. The effective analgesic dose for some patients will be too high to be tolerated by other patients.
Effects on the Central Nervous System (CNS)
The principal therapeutic action of oxymorphone is analgesia. In common with other opioids, oxymorphone causes respiratory depression, in part by a direct effect on the brainstem respiratory centers. The respiratory depression involves a reduction in the responsiveness of the brain stem respiratory centers to both increases in carbon dioxide tension and electrical stimulation. Opioids depress the cough reflex by direct effect on the cough center in the medulla.
Oxymorphone causes miosis, even in total darkness. Pinpoint pupils are a sign of opioid overdose but are not pathognomonic (e.g., pontine lesions of hemorrhagic or ischemic origin may produce similar findings). Marked mydriasis rather than miosis may be seen with hypoxia in overdose situations [see
Overdosage (10.1)]. Other therapeutic effects of oxymorphone include anxiolysis, euphoria and feeling of relaxation.
In addition to analgesia, the widely diverse effects of oxymorphone include drowsiness, changes in mood, decreased gastrointestinal motility, nausea, vomiting, and alterations of the endocrine and autonomic nervous system [see
Clinical Pharmacology (12.1)].
Effects on the Gastrointestinal Tract and on Other Smooth Muscle
Gastric, biliary and pancreatic secretions are decreased by oxymorphone. Oxymorphone causes a reduction in motility and is associated with an increase in tone in the antrum of the stomach and duodenum. Digestion of food in the small intestine is delayed and propulsive contractions are decreased. Propulsive peristaltic waves in the colon are decreased, while tone is increased to the point of spasm. The end result may be constipation. Oxymorphone can cause a marked increase in biliary tract pressure as a result of spasm of the sphincter of Oddi, and transient elevations in serum amylase. Oxymorphone may also cause spasm of the sphincter of the urinary bladder.
Cardiovascular System Effects
Opioids produce peripheral vasodilation which may result in orthostatic hypotension. Release of histamine can occur and may contribute to opioid-induced hypotension. Manifestations of histamine release may include orthostatic hypotension, pruritus, flushing, red eyes, and sweating. Animal studies have shown that oxymorphone has a lower propensity to cause histamine release than other opioids.
Endocrine System Effects
Opioid agonists have been shown to have a variety of effects on the secretion of hormones. Opioids inhibit the secretion of ACTH, cortisol, and luteinizing hormone (LH) in humans. They also stimulate prolactin, growth hormone (GH) secretion, and pancreatic secretion of insulin and glucagon in humans and other species, rats and dogs. Thyroid stimulating hormone (TSH) has been shown to be both inhibited and stimulated by opioids.
Immune System Effects
Opioids have been shown to have a variety of effects on components of the immune system in in vitro and animal models. The clinical significance of these findings is unknown.
12.3 Pharmacokinetics
Absorption
The absolute oral bioavailability of oxymorphone is approximately 10%.
Steady-state levels are achieved after three days of multiple dose administration. Under both single-dose and steady-state conditions, dose proportionality has been established for the 5 mg, 10 mg, 20 mg, and 40 mg doses of OPANA ER, for both peak plasma levels (Cmax) and extent of absorption (AUC) (see Table 4).
Regimen
| Dosage
| Cmax
(ng/mL) | AUC
(ng·hr/mL) | T ½
(hr) |
Single Dose
| 5 mg
10 mg 20 mg 40 mg | 0.27±0.13
0.65±0.29 1.21±0.77 2.59±1.65 | 4.54±2.04
8.94±4.16 17.81±7.22 37.90±16.20 | 11.30+10.81
9.83+5.68 9.89+3.21 9.35+2.94 |
Multiple Dosea
| 5 mg
10 mg 20 mg 40 mg | 0.70±0.55
1.24±0.56 2.54±1.35 4.47±1.91 | 5.60±3.87
9.77±3.52 19.28±8.32 36.98±13.53 | NA
NA NA NA |
NA = not applicable
a Results after 5 days of q12h dosing. |
|
|
|
|
Food Effect
Two studies examined the effect of food on the bioavailability of single doses of 20 and 40 mg of OPANA ER in healthy volunteers. In both studies, after the administration of OPANA ER, the Cmax was increased by approximately 50% in fed subjects compared to fasted subjects. A similar increase in Cmax was also observed with oxymorphone solution.
The AUC was unchanged in one study and increased by approximately 18% in the other study in fed subjects following the administration of OPANA ER. Examination of the AUC suggests that most of the difference between fed and fasting conditions occurs in the first four hours after dose administration. After oral dosing with a single dose of 40 mg, a peak oxymorphone plasma level of 2.8 ng/ml is achieved at 1hour in fasted subjects and a peak of 4.25 ng/ml is achieved at 2 hours in fed subjects and that beyond the 12 hour time point, there is very little difference in the curves. As a result, OPANA ER should be dosed at least one hour prior to or two hours after eating [see
Dosage and Administration (2.2)].
Ethanol Effect
In Vivo OPANA ER Formulation-Alcohol Interaction
Although in vitro studies have demonstrated that OPANA ER does not release oxymorphone more rapidly in 500 mL of 0.1N HCl solutions containing ethanol (4%, 20%, and 40%), there is an in vivo interaction with alcohol. An in vivo study examined the effect of alcohol (40%, 20%, 4% and 0%) on the bioavailability of a single dose of 40 mg of OPANA ER in healthy, fasted volunteers. The results showed that the oxymorphone mean AUC was 13% higher (not statistically significant) after co-administration of 240 mL of 40% alcohol. The AUC was essentially unaffected in subjects following the co-administration of OPANA ER and ethanol (240 mL of 20% or 4% ethanol).
There was a highly variable effect on Cmax with concomitant administration of alcohol and OPANA ER. The change in Cmax ranged from a decrease of 50% to an increase of 270% across all conditions studied. Following concomitant administration of 240 mL of 40% ethanol the Cmax increased on average by 70% and up to 270% in individual subjects. Following the concomitant administration of 240 mL of 20% ethanol, the Cmax increased on average by 31% and up to 260% in individual subjects. Following the concomitant administration of 240 mL of 4 % ethanol, the Cmax increased 7% on average and by as much as 110% for individual subjects. After oral dosing with a single dose of 40 mg in fasted subjects, the mean peak oxymorphone plasma level is 2.4 ng/mL and the median Tmax is 2 hours. Following co-administration of OPANA ER and alcohol (240 mL of 40% ethanol) in fasted subjects, the mean peak oxymorphone level is 3.9 ng/mL and the median Tmax is 1.5 hours (range 0.75 – 6 hours).
Co-administration of oxymorphone and ethanol must be avoided.
Oxymorphone may be expected to have additive effects when used in conjunction with alcohol, other opioids, or illicit drugs that cause central nervous system depression because respiratory depression, hypotension, and profound sedation, coma, or death may result.
Distribution
Formal studies on the distribution of oxymorphone in various tissues have not been conducted. Oxymorphone is not extensively bound to human plasma proteins; binding is in the range of 10% to 12%.
Metabolism
Oxymorphone is highly metabolized, principally in the liver, and undergoes reduction or conjugation with glucuronic acid to form both active and inactive metabolites. The two major metabolites of oxymorphone are oxymorphone-3-glucuronide and 6-OH-oxymorphone. The mean plasma AUC for oxymorphone-3-glucuronide is approximately 90-fold higher than the parent compound. The pharmacologic activity of the glucuronide metabolite has not been evaluated. 6-OH-oxymorphone has been shown in animal studies to have analgesic bioactivity. The mean plasma 6-OH-oymorphone AUC is approximately 70% of the oxymorphone AUC following single oral doses, but is essentially equivalent to the parent compound at steady-state.
Excretion
Because oxymorphone is extensively metabolized, less than 1% of the administered dose is excreted unchanged in the urine. On average, 33% to 38% of the administered dose is excreted in the urine as oxymorphone-3-glucuronide and 0.25% to 0.62% excreted as 6-OH-oxymorphone in subjects with normal hepatic and renal function. In animals given radiolabeled oxymorphone, approximately 90% of the administered radioactivity was recovered within 5 days of dosing. The majority of oxymorphone-derived radioactivity was found in the urine and feces.
Pharmacokinetics in Special Populations
Elderly
The steady-state plasma concentrations of oxymorphone, 6-OH-oxymorphone, and oxymorphone-3-glucuronide are approximately 40% higher in elderly subjects ( 65 years of age) than in young subjects (18 to 40 years of age). On average, age greater than 65 years was associated with a 1.4-fold increase in oxymorphone AUC and a 1.5-fold increase in Cmax. This observation does not appear related to a difference in body weight, metabolism, or excretion of oxymorphone [see
Use in Specific Populations (8.5)].
Gender
The effect of gender was evaluated following single- and multiple-doses of OPANA ER in male and female adult volunteers. There was a consistent tendency for female subjects to have slightly higher AUCss and Cmax values than male subjects; however, gender differences were not observed when AUCss and Cmax were adjusted by body weight.
Hepatic Impairment
The liver plays an important role in the pre-systemic clearance of orally administered oxymorphone. Accordingly, the bioavailability of orally administered oxymorphone may be markedly increased in patients with moderate to severe liver disease. The disposition of oxymorphone was compared in 6 patients with mild, 5 patients with moderate, and one patient with severe hepatic impairment and 12 subjects with normal hepatic function. The bioavailability of oxymorphone was increased by 1.6-fold in patients with mild hepatic impairment and by 3.7-fold in patients with moderate hepatic impairment. In one patient with severe hepatic impairment, the bioavailability was increased by 12.2-fold. The half-life of oxymorphone was not significantly affected by hepatic impairment.
Renal Impairment
Data from a pharmacokinetic study involving 24 patients with renal dysfunction show an increase of 26%, 57%, and 65% in oxymorphone bioavailability in mild (creatinine clearance 51-80 mL/min; n=8), moderate (creatinine clearance 30-50 mL/min; n=8), and severe (creatinine clearance less than 30 mL/min; n=8) patients, respectively, compared to healthy controls.
Drug-Drug Interactions
In vitro studies revealed little to no biotransformation of oxymorphone to 6-OH-oxymorphone by any of the major cytochrome P450 (CYP P450) isoforms at therapeutically relevant oxymorphone plasma concentrations.
No inhibition of any of the major CYP P450 isoforms was observed when oxymorphone was incubated with human liver microsomes at concentrations of less than or equal to 50 µM. An inhibition of CYP3A4 activity occurred at oxymorphone concentrations greater than or equal to 150 µM. Therefore, it is not expected that oxymorphone, or its metabolites will act as inhibitors of any of the major CYP P450 enzymes in vivo.
Increases in the activity of the CYP 2C9 and CYP 3A4 isoforms occurred when oxymorphone was incubated with human hepatocytes. However, clinical drug interaction studies with OPANA ER showed no induction of CYP450 3A4 or 2C9 enzyme activity, indicating that no dose adjustment for CYP 3A4- or 2C9-mediated drug-drug interactions is required.
13 NONCLINICAL TOXICOLOGY
13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility
Carcinogenesis
Long-term studies have been completed to evaluate the carcinogenic potential of oxymorphone in both Sprague-Dawley rats and CD-1 mice. Oxymorphone HCl was administered to Sprague-Dawley rats (2.5, 5, and 10 mg/kg/day in males and 5, 10, and 25 mg/kg/day in females) for 2 years by oral gavage. The systemic drug exposure (AUC ng•h/mL) at the 10 mg/kg/day in male rats was 0.34-fold and at the 25 mg/kg/day dose in female rats was 1.5-fold the human exposure at a dose of 260 mg/day. No evidence of carcinogenic potential was observed in rats. Oxymorphone was administered to CD-1 mice (10, 25, 75 and 150 mg/kg/day) for 2 years by oral gavage. The systemic drug exposure (AUC ng•h/mL) at the 150 mg/kg/day dose in mice was 14.5-fold (in males) and 17.3-fold (in females) times the human exposure at a dose of 260 mg/day. No evidence of carcinogenic potential was observed in mice.
Mutagenesis
Oxymorphone hydrochloride was not mutagenic when tested in the in vitro bacterial reverse mutation assay (Ames test) at concentrations of less than or equal to 5270 g/plate, or in an in vitro mammalian cell chromosome aberration assay performed with human peripheral blood lymphocytes at concentrations less than or equal to 5000 g/ml with or without metabolic activation. Oxymorphone hydrochloride tested positive in both the rat and mouse in vivo micronucleus assays. An increase in micronucleated polychromatic erythrocytes occurred in mice given doses greater than or equal to 250 mg/kg and in rats given doses of 20 and 40 mg/kg. A subsequent study demonstrated that oxymorphone hydrochloride was not aneugenic in mice following administration of up to 500 mg/kg. Additional studies indicate that the increased incidence of micronucleated polychromatic erythrocytes in rats may be secondary to increased body temperature following oxymorphone administration. Doses associated with increased micronucleated polychromatic erythrocytes also produce a marked, rapid increase in body temperature. Pretreatment of animals with sodium salicylate minimized the increase in body temperature and prevented the increase in micronucleated polychromatic erythrocytes after administration of 40 mg/kg oxymorphone.
Impairment of fertility
Oxymorphone hydrochloride did not affect reproductive function or sperm parameters in male rats at any dose tested (less than or equal to 50 mg/kg/day). The highest dose tested is ~6-fold the human dose of 40 mg every 12 hours, based on body surface area. In female rats, an increase in the length of the estrus cycle and decrease in the mean number of viable embryos, implantation sites and corpora lutea were observed at doses of oxymorphone greater than or equal to 10 mg/kg/day. The dose of oxymorphone associated with reproductive findings in female rats is 1.2-fold the human dose of 40 mg every 12 hours based on a body surface area. The dose of oxymorphone that produced no adverse effects on reproductive findings in female rats is 0.6-fold the human dose of 40 mg every 12 hours on a body surface area basis.
14 CLINICAL STUDIES
The efficacy and safety of OPANA ER have been evaluated in double-blind, controlled clinical trials in opioid-naïve and opioid-experienced patients with moderate to severe pain including low back pain.
14.1 12-Week Study in Opioid-Naïve Patients with Low Back Pain
Patients with chronic low back pain who were suboptimally responsive to their current non-opioid therapy entered a 4-week, open-label dose titration phase. Patients initiated therapy with two days of treatment with OPANA ER 5 mg, every 12 hours. Thereafter, patients were titrated to a stabilized dose, at increments of 5-10 mg every 12 hours every 3-7 days. Of the patients who were able to stabilize within the Open-Label Titration Period, the mean±SD VAS score at Screening was 69.4±11.8 mm and at Baseline (beginning of Double-Blind Period) were 18.5±11.2 mm and 19.3±11.3 mm for the oxymorphone ER and placebo groups, respectively. Sixty three percent of the patients enrolled were able to titrate to a tolerable dose and were randomized into a 12-week double-blind treatment phase with placebo or their stabilized dose of OPANA ER. The mean±SD stabilized doses were 39.2±26.4 mg and 40.9±25.3 mg for the OPANA ER and placebo groups, respectively; total daily doses ranged from 10-140 mg. During the first 4 days of double-blind treatment patients were allowed an unlimited number of OPANA, an immediate-release (IR) formulation of oxymorphone, 5 mg tablets, every 4-6 hours as supplemental analgesia; thereafter the number of OPANA was limited to two tablets per day. This served as a tapering method to minimize opioid withdrawal symptoms in placebo patients. Sixty-eight percent of patients treated with OPANA ER completed the 12-week treatment compared to forty seven percent of patients treated with placebo. OPANA ER provided superior analgesia compared to placebo. The analgesic effect of OPANA ER was maintained throughout the double-blind treatment period in 89% of patients who completed the study. These patients reported a decrease, no change, or a less than or equal to 10 mm increase in VAS score from Day 7 until the end of the study.
The proportion of patients with various degrees of improvement from screening to study endpoint is shown in Figure 1. The figure is cumulative, so that patients whose change from baseline is, for example, 30%, are also included at every level of improvement below 30%. Patients who did not complete the study were assigned 0% improvement.
14.2 12-Week Study in Opioid-Experienced Patients with Low Back Pain
Patients currently on chronic opioid therapy entered a 4-week, open-label titration phase with OPANA ER dosed every 12 hours at an approximated equianalgesic dose of their pre-study opioid medication. Of the patients who were able to stabilize within the Open-Label Titration Period, the mean±SD VAS score at Screening was 69.5±17.0 mm and at Baseline (beginning of Double-Blind Period) were 23.9±12.1 mm and 22.2±10.8 mm for the oxymorphone ER and placebo groups, respectively. Stabilized patients entered a 12-week double-blind treatment phase with placebo or their stabilized dose of OPANA ER. The mean±SD stabilized doses were 80.9±59.3 mg and 93.3±61.3 mg for the OPANA ER and placebo groups, respectively; total daily doses ranged from 20-260 mg. During the first 4 days of double-blind treatment, patients were allowed an unlimited number of OPANA 5 mg tablets, every 4-6 hours as supplemental analgesia; thereafter the number of OPANA was limited to two tablets per day. This served as a tapering method to minimize opioid withdrawal symptoms in placebo patients. Fifty seven percent of patients were titrated to a stabilized dose within approximately 4 weeks of OPANA ER dose titration. Seventy percent of patients treated with OPANA ER and 26% of patients treated with placebo completed the 12-week treatment. OPANA ER provided superior analgesia compared to placebo. The analgesic effect of OPANA ER was maintained throughout the double-blind treatment period in 80 % of patients who completed the study. These patients reported a decrease, no change, or a less than or equal to 10 mm increase in VAS score from Day 7 until the end of the study.
The proportion of patients with various degrees of improvement from screening to study endpoint is shown in Figure 2. The figure is cumulative, so that patients whose change from baseline is, for example, 30%, are also included at every level of improvement below 30%. Patients who did not complete the study were assigned 0% improvement.
16 HOW SUPPLIED/STORAGE AND HANDLING
OPANA ER tablets are supplied as follows:
5 mg Pink, octagon shape, film coated, convex extended-release tablets debossed with “5” on one side and plain on the other.
Bottles of 100 with child-resistant closure NDC 63481-907-70
Unit-Dose package of 100 tablets
(5 blister cards of 20 tablets, not child-resistant, for hospital use only) NDC 63481-907-75
7.5 mg
Gray, octagon shape, film coated, convex extended-release tablets debossed with “7 ½” on one side and plain on the other.
Bottles of 100 with child-resistant closure NDC 63481-522-70
Unit-Dose package of 100 tablets
(5 blister cards of 20 tablets, not child-resistant, for hospital use only) NDC 63481-522-75
10 mg
Light orange, octagon shape, film coated, convex extended-release tablets debossed with “10” on one side and plain on the other.
Bottles of 100 with child-resistant closure NDC 63481-674-70
Unit-Dose package of 100 tablets (5 blister cards of 20 tablets, not child-resistant, for hospital use only) NDC 63481-674-75
15 mg
White, octagon shape, film coated, convex extended-release tablets debossed with “15” on one side and plain on the other.
Bottles of 100 with child-resistant closure NDC 63481-553-70
Unit-Dose package of 100 tablets (5 blister cards of 20 tablets, not child-resistant, for hospital use only) NDC 63481-553-75
20 mg
Light green, octagon shape, film coated, convex extended-release tablets debossed with “20” on one side and plain on the other.
Bottles of 100 with child-resistant closure NDC 63481-617-70
Unit-Dose package of 100 tablets (5 blister cards of 20 tablets, not child-resistant, for hospital use only) NDC 63481-617-75
30 mg
Red, octagon shape, film coated, convex extended-release tablets debossed with “30” on one side and plain on the other.
Bottles of 100 with child-resistant closure NDC 63481-571-70
Unit-Dose package of 100 tablets (5 blister cards of 20 tablets, not child-resistant, for hospital use only) NDC 63481-571-75
40 mg
Yellow, octagon shape, film coated, convex extended-release tablets debossed with “40” on one side and plain on the other.
Bottles of 100 with child-resistant closure NDC 63481-693-70
Unit-Dose package of 100 tablets (5 blister cards of 20 tablets, not child-resistant, for hospital use only) NDC 63481-693-75
OPANA ER contains oxymorphone, which is a controlled substance. Oxymorphone is controlled under Schedule II of the Controlled Substances Act. Oxymorphone, like all opioids, is liable to diversion and misuse and should be handled accordingly. Patients and their families should be instructed to flush any OPANA ER tablets that are no longer needed.
OPANA ER may be targeted for theft and diversion. Healthcare professionals should contact their State Medical Board, State Board of Pharmacy or State Control Board for information on how to detect or prevent diversion of this product.
Healthcare professionals should advise patients to store OPANA ER in a secure place, preferably locked and out of the reach of children and other non-caregivers.
Manufactured for:
Endo Pharmaceuticals Inc., Chadds Ford, PA 19317
Manufactured by:
Novartis Consumer Health Inc., Lincoln, NE 68517
Store at 25C (77F); excursions permitted to 15-30C (59-86F). [See USP Controlled Room Temperature].
Dispense in tight container as defined in the USP, with a child-resistant closure (as required).
Advise patients to dispose of any unused tablets from a prescription by flushing them down the toilet as soon as they are no longer needed [see
Patient Counseling Information (17)].
17 PATIENT COUNSELING INFORMATION
See FDA-Approved Patient Labeling
- Advise patients that OPANA ER contains oxymorphone, a morphine-like pain reliever, and should be taken only as directed.
- Advise patients that OPANA ER is designed to work properly only if swallowed whole. The extended-release tablets may release all their contents at once if broken, chewed or crushed, resulting in a risk of fatal overdose of oxymorphone.
- Patients must not consume alcoholic beverages, or prescription or non-prescription medications containing alcohol, while on OPANA ER therapy. The co-ingestion of alcohol with OPANA ER may result in increased plasma levels and a potentially fatal overdose of oxymorphone.
- Appropriate pain management requires changes in the dose to maintain best pain control. Advise patients of the need to contact their physician if pain control is inadequate, but not to change the dose of OPANA ER without consulting their physician.
- Advise patients to report episodes of breakthrough pain and adverse experiences occurring during therapy to their doctor. Individualization of dosage is essential to make optimal use of this medication.
- Caution patients that OPANA ER may cause drowsiness, dizziness, or lightheadedness, and may impair mental and/or physical abilities required for the performance of potentially hazardous tasks, such as driving a car, operating machinery, etc.
- Instruct patients not to combine OPANA ER with alcohol or other central nervous system depressants (sleep aids, tranquilizers) except by the orders of the prescribing physician, because additive effects may occur, resulting in serious injury or death.
- Advise patients taking OPANA ER of the potential for severe constipation. Appropriate laxatives and/or stool softeners and other therapeutic approaches may be considered for use with the initiation of OPANA ER therapy.
- Advise patients not to adjust the dose of OPANA ER without consulting the prescribing professional.
- Advise patients that OPANA ER is a potential drug of abuse. They should protect it from theft, and it should never be given to anyone other than the individual for whom it was prescribed.
- Advise women of childbearing potential who become, or are planning to become pregnant to consult their physician regarding the effects of opioid analgesics and other drug use during pregnancy on themselves and their unborn child.
- If patients have been receiving treatment with OPANA ER for more than a few days to weeks and cessation of therapy is indicated, counsel them on the importance of safely tapering the dose and that abruptly discontinuing the medication could precipitate withdrawal symptoms. Provide patients with a dose schedule to accomplish a gradual discontinuation of the medication.
- As with any potent opioid, misuse of OPANA ER may result in serious adverse events. Instruct patients to keep OPANA ER in a secure place out of the reach of children and pets. Accidental consumption especially in children can result in overdose or death. When OPANA ER is no longer needed, instruct patients to destroy unused tablets by flushing them down the toilet.
FDA – Approved Patient Labeling
OPANA® ER (Ō-pan-a)
(Oxymorphone Hydrochloride) Extended-Release Tablets, CII
OPANA ER Tablets, 5 mg
OPANA ER Tablets, 7.5 mg
OPANA ER Tablets, 10 mg
OPANA ER Tablets, 15 mg
OPANA ER Tablets, 20 mg
OPANA ER Tablets, 30 mg
OPANA ER Tablets, 40 mg
IMPORTANT: Keep OPANA ER in a safe place away from children. Accidental use by a child is a medical emergency and can result in death. If a child accidentally takes OPANA ER, get emergency help right away.
Read the Patient Information that comes with OPANA ER before you start taking it and each time you get a new prescription. There may be new information. This information does not take the place of talking with your healthcare provider about your medical condition or your treatment. Share the important information in this leaflet with members of your household.
What Is the Most Important Information I Should Know About OPANA ER?
- OPANA ER can cause trouble breathing (hypoventilation), which can lead to death, if used differently than the way you were told to use it by your healthcare provider (see “What are the possible side effects of OPANA ER?”).
- Swallow OPANA ER tablets whole. Do not break, crush, dissolve, or chew OPANA ER tablets before swallowing. If a tablet is broken, crushed, dissolved, or chewed, the full 12 hour dose can be taken into your body all at once. This is very dangerous. You could die from an overdose of the medicine. Use OPANA ER exactly the way your healthcare provider prescribes. If you cannot swallow tablets whole, tell your healthcare provider. You may need a different medicine.
- Do not consume alcoholic beverages, or prescription or non-prescription medications containing alcohol, while taking OPANA ER.
What is OPANA ER?
- OPANA ER is a prescription medicine that contains the opioid (narcotic pain medicine) oxymorphone. OPANA ER is used to treat adults with constant pain (around the clock) that is moderate to severe and is expected to last for an extended period of time. OPANA ER is not for occasional (―as needed‖) use.
- OPANA ER can cause physical dependence. Do not stop taking OPANA ER all of a sudden if you have been taking it for more than a few days. You could become sick with uncomfortable withdrawal symptoms because your body has become use to the medicine. Talk to your healthcare provider about slowly stopping OPANA ER to avoid getting sick with withdrawal symptoms. Physical dependence is not the same as drug addiction. Your healthcare provider can tell you more about the differences between physical dependence and drug addiction.
- OPANA ER is a controlled substance (CII) because it contains a narcotic painkiller that can be a target for people who abuse prescription medicines or street drugs. Keep your tablets in a safe place to protect them from being stolen. Never give your tablets to anyone else, even if they have the same symptoms you have. Selling or giving away this medicine may harm others, even causing death, and is against the law.
Who Should Not Take OPANA ER?
Do not take OPANA ER if:
- You had surgery within the past day (24 hours) and you were not taking OPANA ER before your surgery.
- Your pain is mild or will go away in a few days.
- Your pain can be controlled by the occasional use of other pain medicines.
- You are having an asthma attack or have severe asthma, trouble breathing, or lung problems.
- You have liver problems.
- You are allergic to OPANA ER or anything in it. See the end of this leaflet for a complete list of ingredients in OPANA ER.
- You have had severe allergic reactions to other narcotic pain medicines (such as morphine or codeine medicines). A severe allergic reaction includes a severe rash, hives, breathing problems, or dizziness.
OPANA ER is not for children under 18 years of age.
What Should I Tell My Healthcare Provider Before Starting OPANA ER?
Tell your healthcare provider about all of your medical problems, especially if you:
- have trouble breathing or lung problems
- have a head injury or brain problems
- have liver or kidney problems
- have adrenal gland problems, such as Addison’s disease
- have convulsions or seizures
- have thyroid problems
- have problems urinating or prostate problems
- have pancreas problems
- have a drinking problem or alcoholism
- have severe mental problems or hallucinations (see or hear things that are not really there)
- have past or present drug abuse or drug addiction problems
- are pregnant or plan to become pregnant. OPANA ER may harm your unborn baby.
- are breastfeeding. OPANA ER may pass through your milk and may harm your baby. You should not breastfeed while taking OPANA ER.
Tell your healthcare provider about all the medicines you take, including prescription and nonprescription medicines, vitamins, and herbal supplements. Some medicines may cause serious problems when taken with OPANA ER, especially if they cause sleepiness (like sleeping pills, anxiety medicines, antihistamines, or tranquilizers).
Do not take any new medicines while using OPANA ER until you have talked to your healthcare provider or pharmacist and they have told you it is safe.
Know the medicines you take. Keep a list of them to show your healthcare provider and pharmacist.
How Should I Take OPANA ER?
- Follow your healthcare provider’s directions exactly. Your healthcare provider may change your dose based on your reactions to the medicine. Do not change your dose unless your healthcare provider tells you to change it. Do not take OPANA ER more often than prescribed.
- Swallow OPANA ER tablets whole. Do not break, crush, dissolve, or chew OPANA ER tablets before swallowing. If a tablet is broken, crushed, dissolved, or chewed, the full 12 hour dose can be taken into your body all at once. This is very dangerous. You could die from an overdose of the medicine. If you cannot swallow tablets whole, tell your healthcare provider. You may need a different medicine.
- Take OPANA ER every 12 hours or as instructed by your healthcare provider. OPANA ER should be taken on an empty stomach, at least one hour before or two hours after meals. Talk to your healthcare provider if you feel sick taking OPANA ER on an empty stomach.
- If you miss a dose, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once unless your healthcare provider tells you to. If you are not sure about your dosing call your healthcare provider.
- If you take too much OPANA ER or overdose, call your local emergency number or poison control center right away.
- Talk to your healthcare provider often about your pain. Your healthcare provider can decide if you still need OPANA ER.
- If you have side effects that bother you or if you continue to have pain, call your healthcare provider.
- Stopping OPANA ER. If your healthcare provider decides you no longer need OPANA ER, ask how to slowly reduce the dose of your medicine so you don’t get uncomfortable (withdrawal) symptoms such as nausea, sweating, and pain. You should not stop taking OPANA ER all at once if you have been taking it for more than a few days without talking to your healthcare provider. OPANA ER can cause physical dependence. You can get sick with withdrawal symptoms if you stop OPANA ER all at once, because your body has become use to it.
After you stop taking OPANA ER, flush the unused tablets down the toilet. Safely dispose of OPANA ER out of the reach of children and pets.
What Should I Avoid While Taking OPANA ER?
- Do not drive, operate heavy machinery, or participate in any other possibly dangerous activities until you know how you react to this medicine. OPANA ER can make you sleepy. Ask your healthcare provider to tell you when it is okay to do these activities.
- Do not drink alcohol while using OPANA ER. It may increase the chance of having dangerous side effects including overdose and death.
What are the Possible Side Effects of OPANA ER?
OPANA ER can cause trouble breathing.
Call your healthcare provider or get medical help right away if:
- your breathing slows down
- you have shallow breathing (little chest movement with breathing)
- you feel faint, dizzy, confused, or have any other unusual symptoms
These can be signs that you have taken too much OPANA ER (overdose) or the dose is too high for you, which can be dangerous and lead to death if not treated.
OPANA ER can cause your blood pressure to drop. This can make you feel dizzy if you get up too fast from sitting or lying down. Low blood pressure is also more likely to happen if you are taking other medicines that can also lower your blood pressure.
OPANA ER can cause physical dependence. Your body will get used to OPANA ER if you take it more than a few days. You can get sick with withdrawal symptoms if you stop taking OPANA ER all at once. You can avoid getting sick with withdrawal symptoms by stopping OPANA ER slowly. Your healthcare provider will tell you how to do this.
There is a chance of abuse or addiction with OPANA ER. Abuse or addiction is different than a physical dependence. If you have abused prescription medicines, street drugs or alcohol in the past, you may have a higher chance of developing abuse or addiction again while using OPANA ER. If you have more concerns, talk to your healthcare provider for more information about abuse and addiction.
The most common side effects of OPANA ER are nausea, constipation, dizziness, vomiting, itching, sleepiness, headache, increased sweating, and sedation. Some of these side effects may decrease with continued use. Talk to your healthcare provider if you continue to have these side effects.
These are not all the possible side effects of OPANA ER. For a complete list, ask your healthcare provider or pharmacist.
Constipation (decrease in the usual number of hard bowel movements) is a common side effect of opioid medicines, including OPANA ER. Talk to your healthcare provider or pharmacist about the use of laxatives (medicines to treat constipation) and stool softeners to prevent or treat constipation while taking OPANA ER.
How should I store OPANA ER?
- Store OPANA ER at room temperature between 59 to 86F (15to 30C).
- Keep OPANA ER in a childproof container and store in a safe place to protect it from being stolen.
- Keep OPANA ER out of the reach of children. Accidental overdose in children is an emergency and can result in death.
General Information about OPANA ER
- Do not use OPANA ER for conditions for which it was not prescribed.
- Do not give OPANA ER to other people, even if they have the same symptoms you have. It may harm them, even causing death, and it is against the law.
This leaflet summarizes the most important information about OPANA ER. If you would like more information, talk with your healthcare provider. Also, you can ask your pharmacist or healthcare provider for information about OPANA ER that is written for healthcare professionals.
What are the ingredients in OPANA ER?
Active Ingredient: oxymorphone hydrochloride
Inactive Ingredients: hypromellose, methylparaben, silicified microcrystalline cellulose, sodium stearyl fumarate, TIMERx®-N, titanium dioxide, and triacetin. The 5 mg, 10 mg, 15 mg, 20 mg, and 30 mg tablets also contain macrogol, and polysorbate 80. In addition, the 5 mg, 7.5 mg, and 30 mg tablets contain iron oxide red. The 7.5 mg tablets contain iron oxide black, and iron oxide yellow. The 10 mg tablets contain FDandC yellow No. 6. The 20 mg tablets contain FDandC blue No. 1, FDandC yellow No. 6, and DandC yellow No. 10. The 40 mg tablets contain FDandC yellow No. 6, DandC yellow No.10, and lactose monohydrate.
CAUTION: Federal law prohibits dispensing without prescription.
TIMERx®-N is a registered trademark of Penwest Pharmaceuticals Co., Danbury, Connecticut and is used herein pursuant to a license agreement between Penwest and Endo Pharmaceuticals.
© 2010 Endo Pharmaceuticals
2005648 / September 2010
1
HIGHLIGHTS OF PRESCRIBING INFORMATION
These highlights do not include all the information needed to use
OPANA® ER safely and effectively. See full prescribing information for
OPANA® ER.
OPANA® ER (oxymorphone hydrochloride) extended-release tablets,
for oral use, CII
Initial U.S. Approval: 1959
WARNING: ADDICTION, ABUSE, AND MISUSE; LIFETHREATENING
RESPIRATORY DEPRESSION; ACCIDENTAL
INGESTION; NEONATAL OPIOID WITHDRAWAL SYNDROME;
INTERACTION WITH ALCOHOL; and RISKS FROM
CONCOMITANT USE WITH BENZODIAZEPINES AND OTHER
CNS DEPRESSANTS
See full prescribing information for complete boxed warning.
• OPANA ER exposes users to risks of addiction, abuse, and
misuse, which can lead to overdose and death. Assess patient’s
risk before prescribing and monitor regularly for these behaviors
and conditions. (5.1)
• Serious, life-threatening, or fatal respiratory depression may
occur. Monitor closely, especially upon initiation or following a
dose increase. Instruct patients to swallow OPANA ER tablets
whole to avoid exposure to a potentially fatal dose of
oxymorphone. (5.2)
• Accidental ingestion of OPANA ER, especially by children, can
result in fatal overdose of oxymorphone. (5.2)
• Prolonged use of OPANA ER during pregnancy can result in
neonatal opioid withdrawal syndrome, which may be lifethreatening
if not recognized and treated. If opioid use is
required for a prolonged period in a pregnant woman, advise the
patient of the risk of neonatal opioid withdrawal syndrome and
ensure that appropriate treatment will be available (5.3).
• Instruct patients not to consume alcohol or any product
containing alcohol while taking OPANA ER because co-ingestion
can result in fatal plasma oxymorphone levels. (5.4)
• Concomitant use of opioids with benzodiazepines or other central
nervous system (CNS) depressants, including alcohol, may result
in profound sedation, respiratory depression, coma, and death.
Reserve concomitant prescribing for use in patients for whom
alternative treatment options are inadequate; limit dosages and
durations to the minimum required; and follow patients for signs
and symptoms of respiratory depression and sedation. (5.4, 7)
-----------------------------RECENT MAJOR CHANGES--------------------
Boxed Warning 12/2016
Dosage and Administration (2) 12/2016
Contraindications (4) 12/2016
Warnings and Precautions (5) 12/2016
----------------------------INDICATIONS AND USAGE--------------------------
OPANA ER is an opioid agonist indicated for the management of pain
severe enough to require daily, around-the-clock, long-term opioid treatment
and for which alternative treatment options are inadequate. (1)
Limitations of Use
• Because of the risks of addiction, abuse, and misuse with opioids,
even at recommended doses, and because of the greater risks of
overdose and death with extended-release opioid formulations,
reserve OPANA ER for use in patients for whom alternative treatment
options (e.g., non-opioid analgesics or immediate-release opioids) are
ineffective, not tolerated, or would be otherwise inadequate to provide
sufficient management of pain. (1)
• OPANA ER is not indicated as an as-needed (prn) analgesic. (1)
---------------------DOSAGE AND ADMINISTRATION--------------------
• To be prescribed only by healthcare providers knowledgeable in use of
potent opioids for management of chronic pain. (2.1)
• Use the lowest effective dosage for the shortest duration consistent with
individual patient treatment goals (2.1).
• Individualize dosing based on the severity of pain, patient response, prior
analgesic experience, and risk factors for addiction, abuse, and misuse.
(2.1)
• Administer on an empty stomach, at least 1 hour prior to or 2 hours
after eating. (2.1)
• OPANA ER tablets should be taken one tablet at a time, with
enough water to ensure complete swallowing immediately after
placing in the mouth. (2.1, 17)
• For opioid-naïve and opioid non-tolerant patients, initiate treatment with
5 mg tablets orally every 12 hours. (2.2)
• To convert to OPANA ER from another opioid, use available conversion
factors to obtain estimated dose. (2.2)
• Dose can be increased every 3 to 7 days, using increments of 5 to 10 mg
every 12 hours (i.e., 10 to 20 mg per day). (2.3)
• Do not abruptly discontinue OPANA ER in a physically dependent
patient. (2.4, 5.14)
• Mild Hepatic Impairment: For opioid-naïve patients, initiate treatment
with 5 mg and titrate slowly. For patients on prior opioid therapy,
reduce starting dose by 50% and titrate slowly. Monitor for signs of
respiratory and central nervous system depression. (2.5)
• Renal Impairment: For opioid-naïve patients, initiate treatment with 5
mg and titrate slowly. For patients on prior opioid therapy, reduce
starting dose by 50% and titrate slowly. Monitor for signs of respiratory
and central nervous system depression. (2.6)
• Geriatric Patients: Initiate dosing with 5 mg, titrate slowly, and monitor
for signs of respiratory and central nervous system depression. (2.7)
---------------------DOSAGE FORMS AND STRENGTHS-------------------
Extended-release tablets: 5 mg, 7.5 mg, 10 mg, 15 mg, 20 mg, 30 mg, and
40 mg
------------------------------CONTRAINDICATIONS---------------------------
• Significant respiratory depression (4)
• Acute or severe bronchial asthma in an unmonitored setting or in
absence of resuscitative equipment (4)
• Hypersensitivity to oxymorphone (4)
• Moderate or severe hepatic impairment (4)
• Known or suspected gastrointestinal obstruction, including paralytic
ileus (4)
------------------------WARNINGS AND PRECAUTIONS--------------------
• Life-Threatening Respiratory Depression in Patients with Chronic
Pulmonary Disease or in Elderly, Cachectic, or Debilitated Patients:
Monitor closely, particularly during initiation and titration. (5.5, 5.6)
• Anaphylaxis, Angioedema, and Other Hypersensitivity Reactions: If
symptoms occur, stop administration immediately, discontinue
permanently, and do not rechallenge with any oxymorphone
formulation. (5.6)
• Adrenal Insufficiency: If diagnosed, treat with physiologic replacement
of corticosteroids, and wean patient off of the opioid. (5.7)
• Severe Hypotension: Monitor during dose initiation and titration. Avoid
use of OPANA ER in patients with circulatory shock. (5.9)
• Risks of Use in Patients with Increased Intracranial Pressure, Brain
Tumors, Head Injury or Impaired Consciousness: Monitor for sedation
and respiratory depression. Avoid use of OPANA ER in patients with
impaired consciousness or coma. (5.10)
• Difficulty in Swallowing: Use with caution in patients who have
difficulty in swallowing or have underlying GI disorders that may
predispose them to obstruction. (5.11)
-----------------------------ADVERSE REACTIONS-----------------------------
Adverse reactions in ≥2% of patients in placebo-controlled trials: nausea,
constipation, dizziness, somnolence, vomiting, pruritus, headache, sweating
increased, dry mouth, sedation, diarrhea, insomnia, fatigue, appetite
decreased, and abdominal pain. (6.1)
To report SUSPECTED ADVERSE REACTIONS, contact Endo
Pharmaceuticals Inc. at class="baec5a81-e4d6-4674-97f3-e9220f0136c1" ="white-space: nowrap;">1-800-462-3636 or FDA at 1-800 FDA-1088 or
www.fda.gov/medwatch.
------------------------------DRUG INTERACTIONS----------------------------
• Serotonergic Drugs: Concomitant use may result in serotonin syndrome.
Discontinue OPANA ER if serotonin syndrome is suspected. (7)
• Mixed Agonist/Antagonist and Partial Agonist Opioid Analgesics:
Avoid use with OPANA ER because they may reduce analgesic effect of
OPANA ER or precipitate withdrawal symptoms. (7)
• Monoamine Oxidase Inhibitors (MAOIs): Can potentiate the effects of
oxymorphone. Avoid concomitant use in patients receiving MAOIs or
within 14 days of stopping treatment with an MAOI. (7)
------------------------USE IN SPECIFIC POPULATIONS--------------------
• Pregnancy: May cause fetal harm. (8.1)
• Lactation: Not Recommended. (8.2)
See 17 for PATIENT COUNSELING INFORMATION and
Medication Guide
Revised: 12/2016
________________________________________________________________________________________________________________________________________
Reference ID: 4028719
FULL PRESCRIBING INFORMATION: CONTENTS*
WARNING: ADDICTION, ABUSE, AND MISUSE; LIFETHREATENING
RESPIRATORY DEPRESSION; ACCIDENTAL
INGESTION; NEONATAL OPIOID WITHDRAWAL
SYNDROME; INTERACTION WITH ALCOHOL; and
RISKS FROM CONCOMITANT USE WITH
BENZODIAZEPINES OR OTHER CNS DEPRESSANTS
1 INDICATIONS AND USAGE
2 DOSAGE AND ADMINISTRATION
2.1 Important Dosage and Administration Instructions
2.2 Initial Dosing
2.3 Titration and Maintenance of Therapy
2.4 Discontinuation of OPANA ER
2.5 Dosage Modifications in Patients with Hepatic Impairment
2.6 Dosage Modifications in Patients with Renal Impairment
2.7 Dosage Modifications in Geriatric Patients
3 DOSAGE FORMS AND STRENGTHS
4 CONTRAINDICATIONS
5 WARNINGS AND PRECAUTIONS
5.1 Addiction, Abuse, and Misuse Potential
5.2 Life Threatening Respiratory Depression
5.3 Neonatal Opioid Withdrawal Syndrome
5.4 Risks from Concomitant Use with Benzodiazepines or Other
CNS Depressants
5.5 Risk of Life-Threatening Respiratory Depression in Patients
with Chronic Pulmonary Disease or in Elderly, Cachectic, or
Debilitated Patients
5.6 Anaphylaxis, Angioedema, and Other Hypersensitivity
Reactions
5.7 Adrenal Insufficiency
5.8 Use in Patients with Hepatic Impairment
5.9 Sever Hypotension
5.10 Risks of Use in Patients with Increased Intracranial Pressure,
Brain Tumors, Head Injury, or Impaired Consciousness
5.11 Difficulty in Swallowing and Risk for Obstruction in Patients
at Risk for a Small Gastrointestinal Lumen
5.12 Risks of Use in Patients with Gastrointestinal Conditions
5.13 Increased Risk of Seizures in Patients with Seizure Disorders
5.14 Withdrawal
5.15 Risks of Driving and Operating Machinery
6 ADVERSE REACTIONS
6.1 Clinical Trial Experience
6.2 Post-marketing Experience
7 DRUG INTERACTIONS
8 USE IN SPECIFIC POPULATIONS
8.1 Pregnancy
8.2 Lactation
8.3 Females and Males Reproductive Potential
8.4 Pediatric Use
8.5 Geriatric Use
8.6 Hepatic Impairment
8.7 Renal Impairment
9 DRUG ABUSE AND DEPENDENCE
9.1 Controlled Substance
9.2 Abuse
9.3 Dependence
10 OVERDOSAGE
11 DESCRIPTION
12 CLINICAL PHARMACOLOGY
12.1 Mechanism of Action
12.2 Pharmacodynamics
12.3 Pharmacokinetics
13 NONCLINICAL TOXICOLOGY
13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility
14 CLINICAL STUDIES
16 HOW SUPPLIED/STORAGE AND HANDLING
17 PATIENT COUNSELING INFORMATION
*Sections or subsections omitted from the full prescribing
information are not listed.
_________________________________________________________________________________________________________________________________
Reference ID: 4028719
FULL PRESCRIBING INFORMATION
WARNING: ADDICTION, ABUSE, AND MISUSE; LIFE-THREATENING RESPIRATORY DEPRESSION;
ACCIDENTAL INGESTION; NEONATAL OPIOID WITHDRAWAL SYNDROME;
INTERACTION WITH ALCOHOL; and RISKS FROM CONCOMITANT USE WITH BENZODIAZEPINES OR
OTHER CNS DEPRESSANTS
Addiction, Abuse, and Misuse
OPANA ER exposes patients and other users to the risks of opioid addiction, abuse, and misuse, which can lead to
overdose and death. Assess each patient’s risk prior to prescribing OPANA ER, and monitor all patients regularly
for the development of these behaviors and conditions [see Warnings and Precautions (5.1)].
Life-threatening Respiratory Depression
Serious, life-threatening, or fatal respiratory depression may occur with use of OPANA ER. Monitor for respiratory
depression, especially during initiation of OPANA ER or following a dose increase. Instruct patients to swallow
OPANA ER tablets whole; crushing, chewing, or dissolving OPANA ER tablets can cause rapid release and
absorption of a potentially fatal dose of oxymorphone [see Warnings and Precautions (5.2)].
Accidental Ingestion
Accidental ingestion of even one dose of OPANA ER, especially by children, can result in a fatal overdose of
oxymorphone [see Warnings and Precautions (5.2)].
Neonatal Opioid Withdrawal Syndrome
Prolonged use of OPANA ER during pregnancy can result in neonatal opioid withdrawal syndrome, which may be
life-threatening if not recognized and treated, and requires management according to protocols developed by
neonatology experts. If opioid use is required for a prolonged period in a pregnant woman, advise the patient of the
risk of neonatal opioid withdrawal syndrome and ensure that appropriate treatment will be available [see Warnings
and Precautions (5.3)].
Interaction with Alcohol
Instruct patients not to consume alcoholic beverages or use prescription or non-prescription products that contain
alcohol while taking OPANA ER. The co-ingestion of alcohol with OPANA ER may result in increased plasma levels
and a potentially fatal overdose of oxymorphone [see Warnings and Precautions (5.4)
Risks From Concomitant Use With Benzodiazepines Or Other CNS Depressants
Concomitant use of opioids with benzodiazepines or other central nervous system (CNS) depressants, including
alcohol, may result in profound sedation, respiratory depression, coma, and death [see Warnings and Precautions
(5.4), Drug Interactions (7)].
• Reserve concomitant prescribing of OPANA ER and benzodiazepines or other CNS depressants for use in patients
for whom alternative treatment options are inadequate.
• Limit dosages and durations to the minimum required.
• Follow patients for signs and symptoms of respiratory depression and sedation.
1 INDICATIONS AND USAGE
OPANA ER is indicated for the management of pain severe enough to require daily, around-the-clock, long-term opioid treatment and
for which alternative treatment options are inadequate.
Limitations of Use
• Because of the risks of addiction, abuse, and misuse with opioids, even at recommended doses, and because of the greater risks
of overdose and death with extended-release opioid formulations [see Warnings and Precautions (5.1)], reserve OPANA ER
for use in patients for whom alternative treatment options (e.g., non-opioid analgesics or immediate-release opioids) are
ineffective, not tolerated, or would be otherwise inadequate to provide sufficient management of pain.
• OPANA ER is not indicated as an as-needed (prn) analgesic.
2 DOSAGE AND ADMINISTRATION
2.1 Important Dosage and Administration Instructions
OPANA ER should be prescribed only by healthcare professionals who are knowledgeable in the use of potent opioids for the
management of chronic pain.
• Use the lowest effective dosage for the shortest duration consistent with individual patient treatment goals [see Warnings and
Precautions (5.1)].
Reference ID: 4028719
• Initiate the dosing regimen for each patient individually, taking into account the patient's severity of pain, patient response,
prior analgesic treatment experience, and risk factors for addiction, abuse, and misuse [see Warnings and Precautions (5.1)].
• Monitor patients closely for respiratory depression, especially within the first 24-72 hours of initiating therapy and following
dosage increases with OPANA ER and adjust the dosage accordingly [see Warnings and Precautions (5.2)].
Instruct patients to swallow OPANA ER tablets whole, one tablet at a time, with enough water to ensure complete swallowing
immediately after placing in the mouth [see Patient Counseling Information (17)]. Crushing, chewing, or dissolving OPANA ER
tablets will result in uncontrolled delivery of oxymorphone and can lead to overdose or death [see Warnings and Precautions (5.2)].
Administer on an empty stomach, at least 1 hour prior to or 2 hours after eating.
OPANA ER is administered orally every 12 hours.
2.2 Initial Dosage
Use of OPANA ER as the First Opioid Analgesic
Initiate treatment with OPANA ER with the 5 mg tablet orally every 12-hours.
Use of OPANA ER in Patients who are not Opioid Tolerant
The starting dose for patients who are not opioid tolerant is OPANA ER 5 mg orally every 12 hours.
Patients considered opioid tolerant are those taking, for one week or longer, at least 60 mg oral morphine per day, 25 mcg transdermal
fentanyl per hour, 30 mg oral oxycodone per day, 8 mg oral hydromorphone per day, 25 mg oral oxymorphone per day, 60 mg oral
hydrocodone per day, or an equianalgesic dose of another opioid.
Use of higher starting doses in patients who are not opioid tolerant may cause fatal respiratory depression.
Conversion from OPANA to OPANA ER
Patients receiving OPANA may be converted to OPANA ER by administering half the patient's total daily oral OPANA dose as
OPANA ER, every 12 hours.
Conversion from Parenteral Oxymorphone to OPANA ER
The absolute oral bioavailability of OPANA ER is approximately 10%. Convert patients receiving parenteral oxymorphone to
OPANA ER by administering 10 times the patient's total daily parenteral oxymorphone dose as OPANA ER in two equally divided
doses (e.g., [IV dose x 10] divided by 2). Due to patient variability with regards to opioid analgesic response, upon conversion
monitor patients closely to evaluate for adequate analgesia and side effects.
Conversion from Other Oral Opioids to OPANA ER
Discontinue all other around-the-clock opioid drugs when OPANA ER therapy is initiated.
While there are useful tables of opioid equivalents readily available, there is substantial inter- patient variability in the relative
potency of different opioid drugs and products. As such, it is preferable to underestimate a patient’s 24-hour oral oxymorphone
requirements and provide rescue medication (e.g., immediate-release opioid) than to overestimate the 24-hour oral oxymorphone
requirements which could result in adverse reactions. In an OPANA ER clinical trial with an open-label titration period, patients
were converted from their prior opioid to OPANA ER using Table 1 as a guide for the initial OPANA ER dose.
Consider the following when using the information in Table 1:
• This is not a table of equianalgesic doses.
• The conversion factors in this table are only for the conversion from one of the listed oral opioid analgesics to OPANA ER.
• This table cannot be used to convert from OPANA ER to another opioid. Doing so will result in an overestimation of the dose of
the new opioid and may result in fatal overdose.
CONVERSION FACTORS TO OPANA ER
Prior Oral Opioid Approximate Oral
Conversion Factor
Oxymorphone 1
Hydrocodone 0.5
Oxycodone 0.5
Methadone 0.5
Morphine 0.333
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To calculate the estimated OPANA ER dose using Table 1:
• For patients on a single opioid, sum the current total daily dose of the opioid and then multiply the total daily dose by the
conversion factor to calculate the approximate oral oxymorphone daily dose.
• For patients on a regimen of more than one opioid, calculate the approximate oral oxymorphone dose for each opioid and sum the
totals to obtain the approximate total oxymorphone daily dose.
• For patients on a regimen of fixed-ratio opioid/non-opioid analgesic products, use only the opioid component of these products in
the conversion
Always round the dose down, if necessary, to the appropriate OPANA ER strength(s) available.
Example conversion from a single opioid to OPANA ER:
Step 1: Sum the total daily dose of the opioid oxycodone 20 mg BID
20 mg former opioid 2 times daily = 40 mg total daily dose of former opioid
Step 2: Calculate the approximate equivalent dose of oral oxymorphone based on the total daily dose of the current opioid using
Table 1
40 mg total daily dose of former opioid x 0.5 mg Conversion Factor = 20 mg of oral oxymorphone daily
Step 3: Calculate the approximate starting dose of OPANA ER to be given every 12 hours. Round down, if necessary, to the
appropriate OPANA ER TABLETS strengths available.
10 mg OPANA ER every 12 hours
Conversion from Methadone to OPANA ER
Close monitoring is of particular importance when converting from methadone to other opioid agonists. The ratio between
methadone and other opioid agonists may vary widely as a function of previous dose exposure. Methadone has a long half-life and
can accumulate in the plasma.
2.3 Titration and Maintenance of Therapy
Individually titrate OPANA ER to a dose that provides adequate analgesia and minimizes adverse reactions. Continually reevaluate
patients receiving OPANA ER to assess the maintenance of pain control and the relative incidence of adverse reactions, as well as
monitoring for the development of addiction, abuse, and misuse. Frequent communication is important among the prescriber, other
members of the healthcare team, the patient, and the caregiver/family during periods of changing analgesic requirements, including
initial titration. During chronic therapy, periodically reassess the continued need for the use of opioid analgesics.
If the level of pain increases, attempt to identify the source of increased pain, while adjusting the OPANA ER dose to decrease the
level of pain. Because steady-state plasma concentrations are approximated within 3 days, OPANA ER dosage adjustments, preferably
at increments of 5-10 mg every 12 hours, may be done every 3 to 7 days.
Patients who experience breakthrough pain may require a dose increase of OPANA ER, or may need rescue medication with an
appropriate dose of an immediate-release analgesic. If the level of pain increases after dose stabilization, attempt to identify the source
of increased pain before increasing OPANA ER dose.
If unacceptable opioid-related adverse reactions are observed, the subsequent dose may be reduced. Adjust the dose to obtain an
appropriate balance between management of pain and opioid-related adverse reactions.
2.4 Discontinuation of OPANA ER
When a patient no longer requires therapy with OPANA ER, taper the dose gradually, by 25% to 50% every 2 to 4 days, while
monitoring carefully for signs and symptoms of withdrawal. If the patient develops these signs or symptoms, raise the dose to the
previous level and taper more slowly, either by increasing the interval between decreases, decreasing the amount of change in dose, or
both. Do not abruptly discontinue OPANA ER [see Warnings and Precautions (5.14), Drug Abuse and Dependence (9.3)].
2.5 Dosage Modification in Patients with Mild Hepatic Impairment
OPANA ER is contraindicated in patients with moderate or severe hepatic impairment.
In opioid-naïve patients with mild hepatic impairment, initiate treatment with the 5 mg dose. For patients on prior opioid therapy, start
OPANA ER at 50% lower than the starting dose for a patient with normal hepatic function on prior opioids and titrate slowly.
Monitor patients closely for signs of respiratory or central nervous system depression [see Warnings and Precautions (5.2), Use in
Specific Populations (8.6) and Clinical Pharmacology (12.3)].
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2.6 Dosage Modification in Patients with Renal Impairment
In patients with creatinine clearance rates less than 50 mL/min, start OPANA ER in the opioid-naïve patient with the 5 mg dose. For
patients on prior opioid therapy, start OPANA ER at 50% lower than the starting dose for a patient with normal renal function on prior
opioids and titrate slowly. Monitor patients closely for signs of respiratory or central nervous system depression [see Warnings and
Precautions (5.2), Use in Specific Populations (8.7) and Clinical Pharmacology (12.3)].
2.7 Dosage Modification in Geriatric Patients
The steady-state plasma concentrations of oxymorphone are higher in elderly subjects than in young subjects. Initiate dosing with
OPANA ER in patients 65 years of age and over using the 5 mg dose and monitor closely for signs of respiratory and central nervous
system depression when initiating and titrating OPANA ER to adequate analgesia [see Warnings and Precautions (5.2), Use in
Specific Populations (8.5) and Clinical Pharmacology (12.3)]. For patients on prior opioid therapy, start OPANA ER at 50% lower
than the starting dose for a younger patient on prior opioids and titrate slowly.
3 DOSAGE FORMS AND STRENGTHS
Extended Release Tablets 5 mg: pink, round, film-coated, biconcave extended-release tablet debossed with an “E” on one side and a
“5” on the other side.
Extended Release Tablets 7.5 mg: gray, round, film-coated, biconcave extended-release tablet debossed with an “E” on one side and a
“7 ½” on the other side.
Extended Release Tablets 10 mg: light orange, round, film-coated, biconcave extended-release tablet debossed with an “E” on one
side and a “10” on the other side.
Extended Release Tablets 15 mg: white, round, film-coated, biconcave extended-release tablet debossed with an “E” on one side and a
“15” on the other side.
Extended Release Tablets 20 mg: light green, round, film-coated, biconcave extended-release tablet debossed with an “E” on one side
and a “20” on the other side.
Extended Release Tablets 30 mg: red, round, film-coated, biconcave extended-release tablet debossed with an “E” on one side and a
“30” on the other side.
Extended Release Tablets 40 mg: light yellow to pale yellow, round, film-coated, biconcave extended-release tablet debossed with an
“E” on one side and a “40” on the other side.
4 CONTRAINDICATIONS
OPANA ER is contraindicated in patients with:
• Significant respiratory depression [see Warnings and Precautions (5.2)]
• Acute or severe bronchial asthma in an unmonitored setting or in the absence of resuscitative equipment [see Warnings
and Precautions (5.5)]
• Hypersensitivity to oxymorphone, (e.g. anaphylaxis) [see Warnings and Precautions (5.6), Adverse Reactions (6)]
• Moderate and severe hepatic impairment [see Warnings and Precautions (5.8,) Clinical Pharmacology (12.3)]
• Known or suspected gastrointestinal obstruction, including paralytic ileus [see Warnings and Precautions (5.11)]
5 WARNINGS AND PRECAUTIONS
5.1 Addiction, Abuse, and Misuse
OPANA ER contains oxymorphone, a Schedule II controlled substance. As an opioid, OPANA ER exposes users to the risks of
addiction, abuse, and misuse. Because extended-release products such as OPANA ER deliver the opioid over an extended period of
time, there is a greater risk for overdose and death due to the larger amount of oxymorphone present [see Drug Abuse and Dependence
(9)].
Although the risk of addiction in any individual is unknown, it can occur in patients appropriately prescribed OPANA ER. Addiction
can occur at recommended doses and if the drug is misused or abused.
Assess each patient’s risk for opioid r addiction, abuse, or misuse prior to prescribing OPANA ER, and monitor all patients receiving
OPANA ER for the development of these behaviors and conditions. Risks are increased in patients with a personal or family history of
substance abuse (including drug or alcohol abuse or addiction) or mental illness (e.g., major depression). The potential for these risks
should not, however, prevent the proper management of pain in any given patient. Patients at increased risk may be prescribed
opioids such as OPANA ER, but use in such patients necessitates intensive counseling about the risks and proper use of OPANA ER
along with intensive monitoring for signs of addiction, abuse, and misuse.
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Abuse or misuse of OPANA ER by crushing, chewing, snorting, or injecting the dissolved product will result in the uncontrolled
delivery of the oxymorphone and can result in overdose and death [see Overdosage (10)].
Opioids are sought by drug abusers and people with addiction disorders and are subject to criminal diversion. Consider these risks
when prescribing or dispensing OPANA ER. Strategies to reduce these risks include prescribing the drug in the smallest appropriate
quantity and advising the patient on the proper disposal of unused drug [see Patient Counseling Information (17)]. Contact local state
professional licensing board or state controlled substances authority for information on how to prevent and detect abuse or diversion of
this product.
5.2 Life Threatening Respiratory Depression
Serious, life-threatening, or fatal respiratory depression has been reported with the use of opioids, even when used as recommended.
Respiratory depression from opioid use, if not immediately recognized and treated, may lead to respiratory arrest and death.
Management of respiratory depression may include close observation, supportive measures, and use of opioid antagonists, depending
on the patient’s clinical status [see Overdosage (10)]. Carbon dioxide (CO2) retention from opioid-induced respiratory depression can
exacerbate the sedating effects of opioids.
While serious, life-threatening, or fatal respiratory depression can occur at any time during the use of OPANA ER, the risk is greatest
during the initiation of therapy or following a dosage increase. Monitor patients closely for respiratory depression, especially within
24-72 hours of initiating therapy with and following dose increases of OPANA ER.
To reduce the risk of respiratory depression, proper dosing and titration of OPANA ER are essential [see Dosage and Administration
(2)]. Overestimating the OPANA ER dosage when converting patients from another opioid product can result in fatal overdose with
the first dose.
Accidental ingestion of even one dose of OPANA ER, especially by children, can result in respiratory depression and death due to an
overdose of oxymorphone.
5.3 Neonatal Opioid Withdrawal Syndrome
Prolonged use of OPANA ER during pregnancy can result in withdrawal in the neonate. Neonatal opioid withdrawal syndrome, unlike
opioid withdrawal syndrome in adults, may be life-threatening if not recognized and treated, and requires management according to
protocols developed by neonatology experts. Observe newborns for signs of neonatal opioid withdrawal syndrome and manage
accordingly. Advise pregnant women using opioids for a prolonged period t of the risk of neonatal opioid withdrawal syndrome and
ensure that appropriate treatment will be available.
5.4 Risks from Concomitant Use with Benzodiazepines or Other CNS Depressants
Patients must not consume alcoholic beverages or prescription or non-prescription products containing alcohol while on OPANA ER
therapy. The co-ingestion of alcohol with OPANA ER may result in increased plasma levels and a potentially fatal overdose of
oxymorphone [see Clinical Pharmacology (12.3)].
Profound sedation, respiratory depression, coma, and death may result from the concomitant use of OPANA ER with
benzodiazepines or other CNS depressants (e.g., non-benzodiazepine sedatives/hypnotics, anxiolytics, tranquilizers, muscle
relaxants, general anesthetics, antipsychotics, other opioids, alcohol). Because of these risks, reserve concomitant prescribing of
these drugs for use in patients for whom alternative treatment options are inadequate.
Observational studies have demonstrated that concomitant use of opioid analgesics and benzodiazepines increases the risk of drugrelated
mortality compared to use of opioid analgesics alone. Because of similar pharmacological properties, it is reasonable to
expect similar risk with the concomitant use of other CNS depressant drugs with opioid analgesics [see Drug Interactions (7)].
If the decision is made to prescribe a benzodiazepine or other CNS depressant concomitantly with an opioid analgesic, prescribe the
lowest effective dosages and minimum durations of concomitant use. In patients already receiving an opioid analgesic, prescribe a
lower initial dose of the benzodiazepine or other CNS depressant than indicated in the absence of an opioid, and titrate based on
clinical response. If an opioid analgesic is initiated in a patient already taking a benzodiazepine or other CNS depressant, prescribe a
lower initial dose of the opioid analgesic, and titrate based on clinical response. Follow patients closely for signs and symptoms of
respiratory depression and sedation.
Advise both patients and caregivers about the risks of respiratory depression and sedation when OPANA ER is used with
benzodiazepine or other CNS depressants (including alcohol and illicit drugs). Advise patients not to drive or operate heavy
machinery until the effects of concomitant use of the benzodiazepine or other CNS depressant have been determined. Screen patients
for risk of substance use disorders, including opioid abuse and misuse, and warn them of the risk for overdose and death associated
with the use of additional CNS depressants including alcohol and illicit drugs [see Drug Interactions (7) and Patient Counseling
Information (17)].
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5.5 Life-Threatening Respiratory Depression in Patients with Chronic Pulmonary Disease or in Elderly, Cachectic, or
Debilitated Patients
The use of OPANA ER in patients with acute or severe bronchial asthma in an unmonitored setting or in the absence of resuscitative
equipment is contraindicated.
Patients with Chronic Pulmonary Disease: OPANA ER-treated patients with significant chronic obstructive pulmonary disease or cor
pulmonale, and those with a substantially decreased respiratory reserve, hypoxia, hypercapnia, or pre-existing respiratory depression
are at increased risk of decreased respiratory drive, including apnea even at recommended dosages of OPANA ER [see Warnings and
Precautions (5.2)].
Elderly, Cachectic, or Debilitated Patients: Life-threatening respiratory depression is more likely to occur in elderly, cachectic, or
debilitated patients because they may have altered pharmacokinetics or altered clearance compared to younger, healthier patients [see
Warnings and Precautions (5.2)].
Monitor such patients closely, particularly when initiating and titrating OPANA ER and when OPANA ER is given concomitantly
with other drugs that depress respiration [see Warnings and Precautions (5.2]. Alternatively, consider the use of non-opioid
analgesics in these patients.
5.6 Anaphylaxis, Angioedema, and Other Hypersensitivity Reactions
Potentially life-threatening hypersensitivity reactions, including anaphylaxis and angioedema, have occurred in patients treated with
OPANA ER in the postmarket setting. The most commonly described clinical features in these reports were swelling of the face, eyes,
mouth, lips, tongue, hands, and/or throat; dyspnea; hives, pruritus, and/or rash; and nausea/vomiting. If anaphylaxis or other
hypersensitivity occurs, stop administration of OPANA ER immediately, discontinue OPANA ER permanently, and do not
rechallenge with any formulation of oxymorphone. Advise patients to seek immediate medical attention if they experience any
symptoms of a hypersensitivity reaction [see Patient Counseling Information (17)].
5.7 Adrenal Insufficiency
Cases of adrenal insufficiency have been reported with opioid use, more often following greater than one month of use. Presentation
of adrenal insufficiency may include non-specific symptoms and signs including nausea, vomiting, anorexia, fatigue, weakness,
dizziness, and low blood pressure. If adrenal insufficiency is suspected, confirm the diagnosis with diagnostic testing as soon as
possible. If adrenal insufficiency is diagnosed, treat with physiologic replacement doses of corticosteroids. Wean the patient off of the
opioid to allow adrenal function to recover and continue corticosteroid treatment until adrenal function recovers. Other opioids may be
tried as some cases reported use of a different opioid without recurrence of adrenal insufficiency. The information available does not
identify any particular opioids as being more likely to be associated with adrenal insufficiency.
5.8 Use in Patients with Hepatic Impairment
A study of OPANA ER in patients with hepatic disease indicated greater plasma concentrations than those with normal hepatic
function [see Clinical Pharmacology (12.3)]. OPANA ER is contraindicated in patients with moderate or severe hepatic impairment.
In patients with mild hepatic impairment reduce the starting dose to the lowest dose and monitor for signs of respiratory and central
nervous system depression [see Dosage and Administration (2.5)].
5.9 Severe Hypotension
OPANA ER may cause severe hypotension including orthostatic hypotension and syncope in ambulatory patients. There is an
increased risk in patients whose ability to maintain blood pressure has already been compromised by a reduced blood volume or
concurrent administration of certain CNS depressant drugs (e.g. phenothiazines or general anesthetics) [see Drug Interactions (7)].
Monitor these patients for signs of hypotension after initiating or titrating the dosage of OPANA ER. In patients with circulatory
shock, OPANA ER may cause vasodilation that can further reduce cardiac output and blood pressure. Avoid the use of OPANA ER in
patients with circulatory shock.
5.10 Risks of Use in Patients with Increased Intracranial Pressure, Brain Tumors, Head Injury or Impaired Consciousness
In patients who may be susceptible to the intracranial effects of CO2 retention (e.g., those with evidence of increased intracranial
pressure or brain tumors), OPANA ER may reduce respiratory drive, and the resultant CO2 retention can further increase intracranial
pressure. Monitor such patients for signs of sedation and respiratory depression, particularly when initiating therapy with OPANA ER.
Opioids may also obscure the clinical course in a patient with a head injury. Avoid the use of OPANA ER in patients with impaired
consciousness or coma.
5.11 Difficulty in Swallowing and Risk for Obstruction in Patients at Risk for a Small Gastrointestinal Lumen
There have been post-marketing reports of difficulty in swallowing OPANA ER tablets. These reports included choking, gagging,
regurgitation and tablets stuck in the throat. Instruct patients not to pre-soak, lick or otherwise wet OPANA ER tablets prior to placing
Reference ID: 4028719
in the mouth, and to take one tablet at a time with enough water to ensure complete swallowing immediately after placing in the
mouth.
There have been rare post-marketing reports of cases of intestinal obstruction, some of which have required medical intervention to
remove the tablet. Patients with underlying GI disorders such as esophageal cancer or colon cancer with a small gastrointestinal lumen
are at greater risk of developing these complications. Consider use of an alternative analgesic in patients who have difficulty
swallowing and patients at risk for underlying GI disorders resulting in a small gastrointestinal lumen.
5.12 Risks of Use in Patients with Gastrointestinal Conditions
OPANA ER is contraindicated in patients with known or suspected gastrointestinal obstruction, including paralytic ileus.
The oxymorphone in OPANA ER may cause spasm of the sphincter of Oddi. Opioids may cause increases in serum amylase. Monitor
patients with biliary tract disease, including acute pancreatitis, for worsening symptoms.
5.13 Increased Risk of Seizures in Patients with Seizure Disorders
The oxymorphone in OPANA ER may increase the frequency of seizures in patients with seizure disorders, and may increase the risk
of seizures occurring in other clinical settings associated with seizures. Monitor patients with a history of seizure disorders for
worsened seizure control during OPANA ER therapy.
5.14 Withdrawal
Avoid the use of mixed agonist/antagonist (e.g., pentazocine, nalbuphine, and butorphanol) and partial agonist (e.g., buprenorphine)
analgesics in patients who are receiving a full opioid agonist analgesic, including OPANA ER. In these patients, mixed
agonist/antagonist and partial agonist analgesics may reduce the analgesic effect and/or may precipitate withdrawal symptoms.
When discontinuing OPANA ER, gradually taper the dosage [see Dosage and Administration (2.4)]. Do not abruptly discontinue
OPANA ER.
5.15 Risks of Driving and Operating Machinery
OPANA ER may impair the mental or physical abilities needed to perform potentially hazardous activities such as driving a car or
operating machinery. Warn patients not to drive or operate dangerous machinery unless they are tolerant to the effects of OPANA ER
and know how they will react to the medication.
6 ADVERSE REACTIONS
The following serious adverse reactions are described, or described in greater detail, in other sections:
• Addiction, Abuse, and Misuse [see Warnings and Precautions (5.1)]
• Life Threatening Respiratory Depression [see Warnings and Precautions (5.2)]
• Neonatal Opioid Withdrawal Syndrome [see Warnings and Precautions (5.3)]
• Interactions with Benzodiazepines or Other CNS Depressants [see Warnings and Precautions (5.4)]
• Anaphylaxis and angioedema [see Warnings and Precautions (5.6)]
• Adrenal Insufficiency [see Warnings and Precautions (5.7)]
• Severe Hypotension [see Warnings and Precautions (5.9)]
• Gastrointestinal Adverse Reactions [see Warnings and Precautions (5.11, 5.12)]
• Seizures [see Warnings and Precautions (5.13)]
• Withdrawal [see Warnings and Precautions (5.14)]
6.1 Clinical Trial Experience
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug
cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice.
The safety of oxymorphone hydrochloride extended-release tablets was evaluated in a total of 2011 patients in open-label and
controlled clinical trials. The clinical trials enrolled of patients with moderate to severe chronic non-malignant pain, cancer pain, and
post surgical pain. The most common serious adverse events reported with administration of oxymorphone hydrochloride extendedrelease
tablets were chest pain, pneumonia and vomiting.
Tables 1 and 2 list the most frequently occurring adverse reactions (in at least 5% of patients) from the placebo-controlled trials in
patients with low back pain.
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Table 1:Treatment-Emergent Adverse Reactions Reported in ≥5% of Patients
During the Open-Label Titration Period and Double-Blind Treatment Period by Preferred
Term—Number (%) of Treated Patients (12-Week Study In Opioid-Naïve Patients with Low
Back Pain)
Open-Label Titration
Period
Double-Blind Treatment Period
Oxymorphone
Hydrochloride Extended-
Release Tablets
Oxymorphone
Hydrochloride
Extended-Release
Tablets
Placebo
Preferred Term (N = 325) (N = 105) (N = 100)
Constipation 26% 7% 1%
Somnolence 19% 2% 0%
Nausea 18% 11% 9%
Dizziness 11% 5% 3%
Headache 11% 4% 2%
Pruritus 7% 3% 1%
Table 2: Treatment-Emergent Adverse Reactions Reported in ≥5% of Patients
During the Open-Label Titration Period and Double-Blind Treatment Period by Preferred
Term—Number (%) of Treated Patients (12-Week Study In Opioid-Experienced Patients with
Low Back Pain)
Open-Label Titration
Period
Double-Blind Treatment Period
Oxymorphone
Hydrochloride Extended-
Release Tablets
Oxymorphone
Hydrochloride
Extended-Release
Tablets
Placebo
Preferred Term (N = 250) (N = 70) (N = 72)
Nausea 20% 3% 1%
Constipation 12% 6% 1%
Headache 12% 3% 0%
Somnolence 11% 3% 0%
Vomiting 9% 0% 1%
Pruritus 8% 0% 0%
Dizziness 6% 0% 0%
The following table lists adverse reactions that were reported in at least 2% of patients in placebo-controlled trials (N=5).
Table 3: Adverse Reactions Reported in Placebo-Controlled Clinical Trials with
Incidence ≥2% in Patients Receiving Oxymorphone Hydrochloride Extended-
Release Tablets
MedDRA Preferred Term Oxymorphone
Hydrochloride
Extended-Release
Tablets (N=1259)
Placebo (N=461)
Nausea 33% 13%
Constipation 28% 13%
Dizziness (Excl Vertigo) 18% 8%
Somnolence 17% 2%
Vomiting 16% 4%
Pruritus 15% 8%
Headache 12% 6%
Sweating increased 9% 9%
Dry mouth 6% <1%
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Sedation 6% 8%
Diarrhea 4% 6%
Insomnia 4% 2%
Fatigue 4% 1%
Appetite decreased 3% <1%
Abdominal pain 3% 2%
The common (≥1% to <10%) adverse drug reactions reported at least once by patients treated with oxymorphone hydrochloride
extended-release tablets in the clinical trials organized by MedDRA’s (Medical Dictionary for Regulatory Activities) System Organ
Class and not represented in Table 1 were:
Eye disorders: vision blurred
Gastrointestinal disorders: diarrhea, abdominal pain, dyspepsia
General disorders and administration site conditions: dry mouth, appetite decreased, fatigue, lethargy, weakness, pyrexia, dehydration,
weight decreased, edema
Nervous system disorders: insomnia
Psychiatric disorders: anxiety, confusion, disorientation, restlessness, nervousness, depression
Respiratory, thoracic and mediastinal disorders: dyspnea
Vascular disorders: flushing and hypertension
Other less common adverse reactions known with opioid treatment that were seen <1% in the oxymorphone hydrochloride extendedrelease
tablets trials include the following: Bradycardia, palpitation, syncope, tachycardia, postural hypotension, miosis, abdominal
distention, ileus, hot flashes, allergic reactions, hypersensitivity, urticaria, oxygen saturation decreased, central nervous system
depression, depressed level of consciousness, agitation, dysphoria, euphoric mood, hallucination, mental status changes, difficult
micturition, urinary retention, hypoxia, respiratory depression, respiratory distress, clamminess, dermatitis, hypotension.
6.2 Post-marketing Experience
The following adverse reactions have been identified during post approval use of opioids. Because these reactions are reported
voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal
relationship to drug exposure.
Nervous system disorder: amnesia, convulsion, memory impairment
Serotonin syndrome: Cases of serotonin syndrome, a potentially life-threatening condition, have been reported during concomitant use
of opioids with serotonergic drugs.
Adrenal insufficiency: Cases of adrenal insufficiency have been reported with opioid use, more often following greater than one
month of use.
Anaphylaxis: Anaphylaxis has been reported with ingredients contained in OPANA ER
Androgen deficiency: Cases of androgen deficiency have occurred with chronic use of opioids [see Clinical Pharmacology (12.2)].
7 DRUG INTERACTIONS
Table 4 includes clinically significant drug interactions with OPANA ER
Table 4: Clinically Significant Drug Interactions with OPANA ER
Alcohol
Clinical Impact: The concomitant use of alcohol with OPANA ER can result in an increase of oxymorphone plasma levels and
potentially fatal overdose of oxymorphone.
Intervention: Instruct patients not to consume alcoholic beverages or use prescription or non-prescription products
containing alcohol while on OPANA ER therapy [see Clinical Pharmacology (12.3)].
Benzodiazepines and other Central Nervous System (CNS) Depressants
Clinical Impact: Due to additive pharmacologic effect, the concomitant use of benzodiazepines or other CNS depressants
including alcohol, can increase the risk of hypotension, respiratory depression, profound sedation, coma, and
death.
Intervention: Reserve concomitant prescribing of these drugs for use in patients for whom alternative treatment options are
inadequate. Limit dosages and durations to the minimum required. Follow patients closely for signs of
respiratory depression and sedation [see Warnings and Precautions (5.4)].
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Examples: Benzodiazepines and other sedatives/hypnotics, anxiolytics, tranquilizers, muscle relaxants, general
anesthetics, antipsychotics, other opioids, alcohol.
Serotonergic Drugs
Clinical Impact: The concomitant use of opioids with other drugs that affect the serotonergic neurotransmitter system has
resulted in serotonin syndrome.
Intervention: If concomitant use is warranted, carefully observe the patient, particularly during treatment initiation and
dose adjustment. Discontinue OPANA ER if serotonin syndrome is suspected.
Examples: Selective serotonin reuptake inhibitors (SSRIs), serotonin and norepinephrine reuptake inhibitors (SNRIs),
tricyclic antidepressants (TCAs), triptans, 5-HT3 receptor antagonists, drugs that affect the serotonin
neurotransmitter system (e.g., mirtazapine, trazodone, tramadol), monoamine oxidase (MAO) inhibitors
(those intended to treat psychiatric disorders and also others, such as linezolid and intravenous methylene
blue).
Monoamine Oxidase Inhibitors (MAOIs)
Clinical Impact: MAOI interactions with opioids may manifest as serotonin syndrome or opioid toxicity (e.g., respiratory
depression, coma) [see Warnings and Precautions (5.2)].
Intervention: The use of OPANA ER is not recommended for patients taking MAOIs or within 14 days of stopping such
treatment.
Examples: phenelzine, tranylcypromine, linezolid
Mixed Agonist/Antagonist and Partial Agonist Opioid Analgesics
Clinical Impact: May reduce the analgesic effect of OPANA ER and/or precipitate withdrawal symptoms.
Intervention: Avoid concomitant use.
Examples: butorphanol, nalbuphine, pentazocine, buprenorphine
Muscle Relaxants
Clinical Impact: Oxymorphone may enhance the neuromuscular blocking action of skeletal muscle relaxants and produce an
increased degree of respiratory depression.
Intervention: Monitor patients for signs of respiratory depression that may be greater than otherwise expected and decrease
the dosage of OPANA ER and/or the muscle relaxant as necessary.
Diuretics
Clinical Impact: Opioids can reduce the efficacy of diuretics by inducing the release of antidiuretic hormone.
Intervention: Monitor patients for signs of diminished diuresis and/or effects on blood pressure and increase the dosage of
the diuretic as needed.
Anticholinergic Drugs
Clinical Impact: The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe
constipation, which may lead to paralytic ileus.
Intervention: Monitor patients for signs of urinary retention or reduced gastric motility when OPANA ER is used
concomitantly with anticholinergic drugs.
Cimetidine
Clinical Impact: Cimetidine can potentiate opioid-induced respiratory depression.
Intervention: Monitor patients for respiratory depression when OPANA ER and cimetidine are used concurrently.
8 USE IN SPECIFIC POPULATIONS
8.1 Pregnancy
Risk Summary
Prolonged use of opioid analgesics during pregnancy may cause neonatal opioid withdrawal syndrome [see Warnings and Precautions
(5.3)]. Available data with OPANA ER in pregnant women are insufficient to inform a drug-associated risk for major birth defects
and miscarriage. In animal reproduction studies, reduced postnatal survival of pups and an increased incidence of stillborn pups were
observed following oral treatment of pregnant rats with oxymorphone during gestation and through lactation at doses 2.4 and 12 times
the human daily dose of 20 mg/day (HDD), respectively. Reduced fetal weights were observed with oral administration of
oxymorphone to pregnant rats and rabbits during organogenesis at exposures up to 4.9 and 48.8 times the HDD, respectively [see
Data]. Based on animal data, advise pregnant women of the potential risk to a fetus.
The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a
background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of
major birth defects and miscarriage in clinical recognized pregnancies is 2-4% and 14-20%, respectively.
Reference ID: 4028719
Clinical Considerations
Fetal/Neonatal adverse reactions
Prolonged use of opioid analgesics during pregnancy for medical or nonmedical purposes may cause fetal-neonatal physical
dependence and neonatal withdrawal syndrome shortly after birth. Neonatal opioid withdrawal syndrome presents as
irritability, hyperactivity and abnormal sleep pattern, high pitched cry, tremor, vomiting, diarrhea, and failure to gain weight.
The onset, duration, and severity of neonatal opioid withdrawal syndrome vary based on the specific opioid used, duration of
use, timing and amount of last maternal use, and rate of elimination of the drug by the newborn. Observe newborns for
symptoms of neonatal opioid withdrawal syndrome, including poor feeding, diarrhea, irritability, tremor, rigidity, and
seizures, and manage accordingly [see Warning and Precautions (5.3)].
Labor or delivery
Opioids cross the placenta and may produce respiratory depression and psycho-physiologic effects in neonates. An opioid
antagonist, such as naloxone must be available for reversal of opioid-induced respiratory depression in the neonate. OPANA
ER is not recommended for use in women during and immediately prior to labor, when use of shorter acting analgesics or
other analgesic techniques are more appropriate. Opioid analgesics, including OPANA ER, can prolong labor through actions
which temporarily reduce the strength, duration, and frequency of uterine contractions. However this effect is not consistent
and may be offset by an increased rate of cervical dilatation, which tends to shorten labor. Monitor neonates exposed to
opioid analgesics during labor for signs of excess sedation and respiratory depression.
Data
Animal data
Pregnant rats were treated with oxymorphone hydrochloride from Gestation Day 6 to 17 via oral gavage doses of 5, 10, or 25
mg/kg/day (2.4, 4.9, or 12.2 times the HDD based on body surface area, respectively). Reduced mean fetal weights were
observed at 4.9 times the HDD. Maternal toxicity was noted in all treatment groups (reduced food consumption and body weights
in all groups and mortality in the high dose group).
Pregnant rabbits were treated with oxymorphone hydrochloride from Gestation Day 7 to 20 via oral gavage doses of 10, 25, or 50
mg/kg/day (9.8, 24.4, or 48.8 times the HDD based on body surface area, respectively). Decreased mean fetal weights were noted
at 48.8 times the HDD. Maternal toxicity was noted in all treatment groups (reduced food consumption and body weights).
Pregnant rats were treated with oxymorphone hydrochloride from Gestation Day 6 to Lactation Day 20 via oral gavage doses of 1,
5, 10, or 25 mg/kg/day (0.5, 2.4, 4.9, or 12.2 times the HDD based on body surface area, respectively). Increased neonatal death
(postnatal day 0-1) was noted at 2.4 times the HDD. Decreased pup survival over the first week of life, reduced pup birth weight,
and reduced postnatal weight gain were noted at 4.9 times the HDD. Maternal toxicity was noted in all treatment groups (reduced
food consumption and body weights in all groups and mortality in the 10 and 25 mg/kg/day groups).
8.2 Lactation
In a published study, neural tube defects (exencephaly and cranioschisis) were noted following subcutaneous administration of 153
mg/kg oxymorphone hydrochloride (62.2 times the HDD) on Gestation Day 8 to pregnant hamsters. This dose also produced
significant maternal toxicity (20% maternal deaths).
Risk Summary
There is no information regarding the presence of oxymorphone in human milk, the effects on the breastfed infant, or the effects on
milk production. Because of the potential for serious adverse reactions, including excess sedation and respiratory depression in a
breastfed infant, advise patients that breastfeeding is not recommended during treatment with OPANA ER.
Clinical Considerations
Monitor infants exposed to OPANA ER through breast milk for excess sedation and respiratory depression. Withdrawal symptoms
can occur in breastfed infants when maternal administration of an opioid analgesic is stopped, or when breast-feeding is stopped.
8.3 Females and Males of Reproductive Potential
Infertility
Chronic use of opioids may cause reduced fertility in females and males of reproductive potential. It is not known whether these
effects on fertility are reversible [Clinical Pharmacology (12.2), Nonclinical Toxicology (13.1)].
8.4 Pediatric Use
The safety and effectiveness of OPANA ER in patients below the age of 18 years have not been established.
Reference ID: 4028719
8.5 Geriatric Use
Of the total number of subjects in clinical studies of oxymorphone hydrochloride extended-release tablets, 27% were 65 and over,
while 9% were 75 and over. No overall differences in effectiveness were observed between these subjects and younger subjects.
There were several adverse events that were more frequently observed in subjects 65 and over compared to younger subjects. These
adverse events included dizziness, somnolence, confusion, and nausea. On average, age greater than 65 years was associated with an
increase in oxymorphone AUC and Cmax. Initiate dosing with OPANA ER in patients 65 years of age and over using the 5 mg dose
and monitor closely for signs of respiratory and central nervous system depression when initiating and titrating OPANA ER. For
patients on prior opioid therapy, start at 50% of the starting dose for a younger patient on prior opioids and titrate slowly.
Oxymorphone is known to be substantially excreted by the kidney and the risk of adverse reactions to this drug may be greater in
patients with impaired renal function. Because the elderly patients are more likely to have decreased renal function, care should be
taken in dose selection, and it may be useful to monitor renal function.
8.6 Hepatic Impairment
Patients with mild hepatic impairment have an increase in oxymorphone bioavailability compared to the subjects with normal hepatic
function. In opioid-naïve patients with mild hepatic impairment, initiate OPANA ER using the 5 mg dose and monitor closely for
respiratory and central nervous system depression. OPANA ER is contraindicated for patients with moderate and severe hepatic
impairment [see Dosage and Administration (2.5), Contraindications (4), Warnings and Precautions (5.8), and, Clinical
Pharmacology (12.3)]. For patients on prior opioid therapy, start at the 50% of the dose for that a patient with normal hepatic function
on prior opioids and titrate slowly.
8.7 Renal Impairment
Patients with moderate to severe renal impairment were shown to have an increase in oxymorphone compared to the subjects with
normal renal function [see Clinical Pharmacology (12.3)]. Start opioid-naïve patients with the 5 mg dose of OPANA ER and titrate
slowly while closely monitoring for respiratory and central nervous system depression [see Dosage and Administration (2.6)]. For
patients on prior opioid therapy, start at 50% of the dose for a patient with normal renal function on prior opioids and titrate slowly.
9 DRUG ABUSE AND DEPENDENCE
9.1 Controlled Substance
OPANA ER contains oxymorphone, a Schedule II controlled substance.
The high drug content in extended release formulations adds to the risk of adverse outcomes from abuse and misuse.
9.2 Abuse
OPANA ER contains oxymorphone, a substance with a high potential for abuse similar to other opioids including fentanyl,
hydrocodone, hydromorphone, methadone, morphine, oxycodone, and tapentadol. OPANA ER can be abused and is subject to misuse,
addiction, and criminal diversion [see Warnings and Precautions (5.1)].
The high drug content in extended-release formulations adds to the risk of adverse outcomes from abuse and misuse.
All patients treated with opioids require careful monitoring for signs of abuse and addiction, because use of opioid analgesic products
carries the risk of addiction even under appropriate medical use.
Prescription drug abuse is the intentional non-therapeutic use of prescription drug, even once, for its rewarding psychological or
physiological effects.
Drug addiction is a cluster of behavioral, cognitive, and physiological phenomena that develop after repeated substance use and
includes: a strong desire to take the drug, difficulties in controlling its use, persisting in its use despite harmful consequences, a higher
priority given to drug use than to other activities and obligations, increased tolerance , and sometimes a physical withdrawal.
"Drug seeking" behavior is very common in persons with substance use disorders. Drug-seeking tactics include emergency calls or
visits near the end of office hours, refusal to undergo appropriate examination, testing, or referral, repeated “loss” of prescriptions,
tampering with prescriptions, and reluctance to provide prior medical records or contact information for other treating healthcare
provider(s). “Doctor shopping” (visiting multiple prescribers to obtain additional prescriptions) is common among drug abusers and
people suffering from untreated addiction. Preoccupation with achieving adequate pain relief can be appropriate behavior in a patient
with poor pain control.
Abuse and addiction are separate and distinct from physical dependence and tolerance. Healthcare providers should be aware that
addiction may not be accompanied by concurrent tolerance and symptoms of physical dependence in all addicts. In addition, abuse of
opioids can occur in the absence of true addiction.
OPANA ER, like other opioids, can be diverted for non-medical use into illicit channels of distribution. Careful record-keeping of
prescribing information, including quantity, frequency, and renewal requests as required by state and federal law, is strongly advised.
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Proper assessment of the patient, proper prescribing practices, periodic re-evaluation of therapy, and proper dispensing and storage are
appropriate measures that help to limit abuse of opioid drugs.
Risks Specific to Abuse of OPANA ER
OPANA ER is for oral use only. Abuse of OPANA ER poses a risk of overdose and death. This risk is increased with concurrent
abuse of OPANA ER with alcohol and other substances. Taking cut, broken, chewed, crushed, or dissolved OPANA ER enhances
drug release and increases the risk of over dose and death.
With parenteral abuse, cases of thrombotic microangiopathy (a condition characterized clinically by thrombocytopenia and
microangiopathic hemolytic anemia) have been reported; many cases resulted in hospitalization and treatment with plasmapheresis.
Parenteral drug abuse is commonly associated with transmission of infectious diseases such as hepatitis and HIV.
9.3 Dependence
Both tolerance and physical dependence can develop during chronic opioid therapy. Tolerance is the need for increasing doses of
opioids to maintain a defined effect such as analgesia (in the absence of disease progression or other external factors). Tolerance may
occur to both the desired and undesired effects of drugs, and may develop at different rates for different effects.
Physical dependence results in withdrawal symptoms after abrupt discontinuation or a significant dosage reduction of a drug.
Withdrawal also may be precipitated through the administration of drugs with opioid antagonist activity, (e.g., naloxone, nalmefene),
mixed agonist/antagonist analgesics (e.g., pentazocine, butorphanol, nalbuphine), or partial agonists (e.g., buprenorphine). Physical
dependence may not occur to a clinically significant degree until after several days to weeks of continued opioid usage
OPANA ER should not be abruptly discontinued [see Dosage and Administration (2.3)]. If OPANA ER is abruptly discontinued in a
physically-dependent patient, withdrawal syndrome may occur. Some or all of the following can characterize this syndrome:
restlessness, lacrimation, rhinorrhea, yawning, perspiration, chills, myalgia, and mydriasis. Other signs and symptoms also may
develop, including: irritability, anxiety, backache, joint pain, weakness, abdominal cramps, insomnia, nausea, anorexia, vomiting,
diarrhea, or increased blood pressure, respiratory rate, or heart rate.
Infants born to mothers physically dependent on opioids will also be physically dependent and may exhibit respiratory difficulties and
withdrawal signs [see Use in Specific Populations (8.2)].
10 OVERDOSAGE
Clinical Presentation
Acute overdosage with OPANA ER can be manifested by respiratory depression, somnolence progressing to stupor or coma, skeletal
muscle flaccidity, cold and clammy skin, constricted pupils, and, some cases, pulmonary edema, bradycardia, hypotension, partial or
complete airway obstruction, atypical snoring, and death. Marked mydriasis rather than miosis may be seen due to severe hypoxia in
overdose situations [see Clinical Pharmacology (12.2)].
Treatment of Overdose
In case of overdose, priorities are the re-establishment of a patent and protected airway and institution of assisted or controlled
ventilation, if needed. Employ other supportive measures (including oxygen, vasopressors) in the management of circulatory shock
and pulmonary edema as indicated. Cardiac arrest or arrhythmias will require advanced life support techniques.
The opioid antagonists, naloxone or nalmefene, are specific antidotes to respiratory depression resulting from opioid overdose.
For clinically significant respiratory or circulatory depression secondary to oxymorphone overdose, administer an opioid antagonist.
Opioid antagonists should not be administered in the absence of clinically significant respiratory or circulatory depression secondary
to oxymorphone overdose.
Because the duration of opioid reversal is expected to be less than the duration of action of oxymorphone in OPANA ER, carefully
monitor the patient until spontaneous respiration is reliably reestablished. OPANA ER will continue to release oxymorphone and add
to the oxymorphone load for 24 hour to 48 hours or longer following ingestion, , necessitating prolonged monitoring. If the response
to an opioid antagonist is suboptimal or only brief in nature, administer additional antagonist as directed in the product’s prescribing
information.
In an individual physically dependent on opioids, administration of the recommended usual dosage of the antagonist will precipitate
an acute withdrawal syndrome. The severity of the withdrawal symptoms experienced will depend on the degree of physical
dependence and the dose of the antagonist administered. If a decision is made to treat serious respiratory depression in the physically
dependent patient, administration of the antagonist should be initiated with care and by titration with smaller than usual doses of the
antagonist.
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11 DESCRIPTION
OPANA ER extended-release tablets are for oral use and contain oxymorphone, an opioid agonist. OPANA ER extended-release
tablets are supplied in 5 mg, 7.5 mg, 10 mg, 15 mg, 20 mg, 30 mg, and 40 mg tablet strengths for oral administration. The tablet
strength describes the amount of oxymorphone hydrochloride per tablet.
The tablets contain the following inactive ingredients: hypromellose, polyethylene oxide, polyethylene glycol, α-tocopherol, citric
acid, polyvinyl alcohol, titanium dioxide, macrogol and talc.
In addition, the 5 mg, 7.5 mg and 30 mg tablets contain iron oxide red. The 7.5 mg tablets contain iron oxide black, and iron oxide
yellow. The 10 mg tablets contain FD&C yellow No. 6. The 20 mg tablets contain FD&C blue No. 1, FD&C yellow No. 6, and D&C
yellow No. 10. The 40 mg tablets contain FD&C yellow No. 6, and D&C yellow No. 10.
The chemical name of oxymorphone hydrochloride is 4, 5α -epoxy-3, 14-dihydroxy-17-methylmorphinan-6-one hydrochloride, a
white or slightly off-white, odorless powder, which is sparingly soluble in alcohol and ether, but freely soluble in water. The
molecular weight of oxymorphone hydrochloride is 337.80. The pKa1 and pKa2 of oxymorphone at 37°C are 8.17 and 9.54,
respectively. The octanol/aqueous partition coefficient at 37°C and pH 7.4 is 0.98.
The structural formula for oxymorphone hydrochloride is as follows:
12 CLINICAL PHARMACOLOGY
12.1 Mechanism of Action
Oxymorphone is a full opioid agonist and is relatively selective for the mu-opioid receptor, although it can bind to other opioid
receptors at higher doses. The principal therapeutic action of oxymorphone is analgesia. Like all full opioid agonists, there is no
ceiling effect for analgesia with oxycodoneoxymorphone [editorial change]. Clinically, dosage is titrated to provide adequate
analgesia and may be limited by adverse reactions, including respiratory and CNS depression.
The precise mechanism of analgesia, the principal therapeutic action of oxymorphone, is unknown. However, specific CNS opioid
receptors for endogenous compounds with opioid-like activity have been identified throughout the brain and spinal cord and are
thought to play a role in the analgesic effects of this drug.
12.2 Pharmacodynamics
CNS Depressant/Alcohol Interaction
Additive pharmacodynamic effects may be expected when OPANA ER is used in conjunction with alcohol, other opioids, or illicit
drugs that cause central nervous system depression.
Effects on the Central Nervous System
Oxymorphone produces respiratory depression by direct action on brain stem respiratory centers. The respiratory depression involves
a reduction in the responsiveness of the brain stem respiratory centers to both increases in carbon dioxide tension and electrical
stimulation. Oxymorphone causes miosis, even in total darkness. Pinpoint pupils are a sign of opioid overdose but are not
pathognomonic (e.g., pontine lesions of hemorrhagic or ischemic origins may produce similar findings). Marked mydriasis rather than
miosis may be seen due to hypoxia in overdose situations.
Effects on the Gastrointestinal Tract and on Other Smooth Muscle
Oxymorphone causes a reduction in motility and is associated with an increase in tone in the antrum of the stomach and duodenum.
Digestion of food in the small intestine is delayed and propulsive contractions are decreased. Propulsive peristaltic waves in the colon
are decreased, while tone is increased to the point of spasm, resulting in constipation. Other opioid-induced effects may include a
reduction in biliary and pancreatic secretions, spasm of sphincter of Oddi, and transient elevations in serum amylase.
Effects on the Cardiovascular System
Oxymorphone produces peripheral vasodilation which may result in orthostatic hypotension or syncope. Release of histamine can
occur and may contribute to opioid-induced hypotension. Manifestations of histamine release and/or peripheral vasodilation may
include, pruritus, flushing, red eyes, sweating, and/or orthostatic hypotension.
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Effects on the Endocrine System
Opioids inhibit the secretion of adrenocorticotropic hormone (ACTH), cortisol, and luteinizing hormone (LH) in humans [see Adverse
Reactions (6.2)]. They also stimulate prolactin, growth hormone (GH) secretion, and pancreatic secretion of insulin and glucagon.
Chronic use of opioids may influence the hypothalamic-pituitary-gonadal axis, leading to androgen deficiency that may manifest as
low libido, impotence, erectile dysfunction, amenorrhea, or infertility. The causal role of opioids in the clinical syndrome of
hypogonadism is unknown because the various medical, physical, lifestyle, and psychological stressors that may influence gonadal
hormone levels have not been adequately controlled for in studies conducted to date [see Adverse Reactions (6.2)].
Effects on the Immune System
Opioids have been shown to have a variety of effects on components of the immune system in in vitro and animal models. The
clinical significance of these findings is unknown. Overall, the effects of opioids appear to be modestly immunosuppressive.
Concentration-Efficacy Relationships
The minimum effective plasma concentration of oxymorphone will varyies [editorial change] widely among patients, especially
among patients who have been previously treated with agonist opioids. The minimum effective analgesic concentration of
oxymorphone for any individual patient may increase over time due to an increase in pain, development of a new pain syndrome,
and/or the development of analgesic tolerance [see Dosage and Administration (2.1, 2.2)].
Concentration–Adverse Reaction Relationships
There is a relationship between increasing oxymorphone plasma concentration and increasing frequency of dose-related opioid
adverse reactions such as nausea, vomiting, CNS effects, and respiratory depression. In opioid-tolerant patients, the situation may be
altered by the development of tolerance to opioid-related adverse reactions [see Dosage and Administration (2.1, 2.2, 2.3)].
12.3 Pharmacokinetics
Absorption
The absolute oral bioavailability of oxymorphone is approximately 10%.
Steady-state levels are achieved after three days of multiple dose administration. Under both single-dose and steady-state conditions,
dose proportionality has been established for the 5 mg, 10 mg, 20 mg, and 40 mg doses of oxymorphone hydrochloride extendedrelease
tablets, for both peak plasma levels (Cmax) and extent of absorption (AUC) (see Table 4).
Table 4: Mean (±SD) Oxymorphone Hydrochloride Extended-Release Tablets
Pharmacokinetic Parameters
Regimen Dosage Cmax
(ng/mL)
AUC0-12h
(ng·hr/mL)
T ½
(hr)
Single Dose 5 mg
10 mg
20 mg
40 mg
0.27±0.13
0.65±0.29
1.21±0.77
2.59±1.65
4.54±2.04
8.94±4.16
17.81±7.22
37.90±16.20
11.30±10.81
9.83±5.68
9.89±3.21
9.35±2.94
Multiple Dosea 5 mg
10 mg
20 mg
40 mg
0.70±0.55
1.24±0.56
2.54±1.35
4.47±1.91
5.60±3.87
9.77±3.52
19.28±8.32
36.98±13.53
NA
NA
NA
NA
NA = not applicable
a Results after 5 days of q12h dosing.
Food Effect
Two studies examined the effect of food on the bioavailability of single doses of 20 and 40 mg of oxymorphone hydrochloride
extended-release tablets in healthy volunteers. In both studies, after the administration of oxymorphone hydrochloride extendedrelease
tablets, the Cmax was increased by approximately 50% in fed subjects compared to fasted subjects. A similar increase in Cmax
was also observed with oxymorphone solution.
The AUC was unchanged in one study and increased by approximately 18% in the other study in fed subjects following the
administration of oxymorphone hydrochloride extended-release tablets. Examination of the AUC suggests that most of the difference
between fed and fasting conditions occurs in the first four hours after dose administration. After oral dosing with a single dose of 40
mg, a peak oxymorphone plasma level of 2.8 ng/ml is achieved at 1hour in fasted subjects and a peak of 4.25 ng/ml is achieved at 2
hours in fed subjects and that beyond the 12 hour time point, there is very little difference in the curves. As a result, OPANA ER
should be dosed at least one hour prior to or two hours after eating [see Dosage and Administration (2.1, 2.2)].
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Distribution
Formal studies on the distribution of oxymorphone in various tissues have not been conducted. Oxymorphone is not extensively
bound to human plasma proteins; binding is in the range of 10% to 12%.
Elimination
Metabolism
Oxymorphone is highly metabolized, principally in the liver, and undergoes reduction or conjugation with glucuronic acid to
form both active and inactive metabolites. The two major metabolites of oxymorphone are oxymorphone-3-glucuronide and
6-OH-oxymorphone. The mean plasma AUC for oxymorphone-3-glucuronide is approximately 90-fold higher than the parent
compound. The pharmacologic activity of the glucuronide metabolite has not been evaluated. 6-OH-oxymorphone has been
shown in animal studies to have analgesic bioactivity. The mean plasma 6-OH-oxymorphone AUC is approximately 70% of
the oxymorphone AUC following single oral doses, but is essentially equivalent to the parent compound at steady-state.
Excretion
Because oxymorphone is extensively metabolized, <1% of the administered dose is excreted unchanged in the urine. On
average, 33% to 38% of the administered dose is excreted in the urine as oxymorphone-3-glucuronide and less than 1%
excreted as 6-OH-oxymorphone in subjects with normal hepatic and renal function. In animals given radiolabeled
oxymorphone, approximately 90% of the administered radioactivity was recovered within 5 days of dosing. The majority of
oxymorphone-derived radioactivity was found in the urine and feces.
Specific Populations
Geriatric Patients
The steady-state plasma concentrations of oxymorphone, 6-OH-oxymorphone, and oxymorphone-3-glucuronide are approximately
40% higher in elderly subjects (≥ 65 years of age) than in young subjects (18 to 40 years of age). On average, age greater than 65
years was associated with a 1.4-fold increase in oxymorphone AUC and a 1.5-fold increase in Cmax. This observation does not appear
related to a difference in body weight, metabolism, or excretion of oxymorphone [see Use in Specific Populations (8.5)].
Sex
The effect of sex was evaluated following single- and multiple-doses of oxymorphone hydrochloride extended-release tablets in male
and female adult volunteers. There was a consistent tendency for female subjects to have slightly higher AUCss and Cmax values than
male subjects; however, sex differences were not observed when AUCss and Cmax were adjusted by body weight.
Hepatic Impairment
The bioavailability of orally administered oxymorphone is markedly increased in patients with moderate to severe liver disease. The
disposition of oxymorphone was compared in six patients with mild, five patients with moderate, and one patient with severe hepatic
impairment and 12 subjects with normal hepatic function. The bioavailability of oxymorphone was increased by 1.6-fold in patients
with mild hepatic impairment and by 3.7-fold in patients with moderate hepatic impairment. In one patient with severe hepatic
impairment, the bioavailability was increased by 12.2-fold. The half-life of oxymorphone was not significantly affected by hepatic
impairment.
Renal Impairment
Data from a pharmacokinetic study involving 24 patients with renal dysfunction show an increase of 26%, 57%, and 65% in
oxymorphone bioavailability in mild (creatinine clearance 51-80 mL/min; n=8), moderate (creatinine clearance 30-50 mL/min; n=8),
and severe (creatinine clearance <30 mL/min; n=8) patients, respectively, compared to healthy controls.
Drug Interaction Studies
Alcohol Interaction
An in vivo study of the effect of alcohol (40%, 20%, 4% and 0%) on the bioavailability of a single dose of 40 mg of oxymorphone
hydrochloride extended-release tablets in healthy, fasted volunteers demonstrated a highly variable effect on Cmax with concomitant
administration of alcohol and oxymorphone hydrochloride extended-release tablets. The change in Cmax ranged from a decrease of
50% to an increase of 270% across all conditions studied. Following administration of 240 mL of 40% ethanol, the Cmax increased on
average by 70% and up to 270% in individual subjects. Following the concomitant administration of 240 mL of 20% ethanol, the Cmax
increased on average by 31% and up to 260% in individual subjects. Following the concomitant administration of 240 mL of 4 %
ethanol, the Cmax increased 7% on average and by as much as 110% for individual subjects. After oral dosing with a single dose of
40 mg in fasted subjects, the mean peak oxymorphone plasma level is 2.4 ng/mL and the median Tmax is 2 hours. Following coadministration
of oxymorphone hydrochloride extended-release tablets and alcohol (240 mL of 40% ethanol) in fasted subjects, the
mean peak oxymorphone level is 3.9 ng/mL and the median Tmax is 1.5 hours (range 0.75 – 6 hours). The oxymorphone mean AUC
was 13% higher after co-administration of 240 mL of 40% alcohol. The AUC was essentially unaffected in subjects following the coadministration
of oxymorphone hydrochloride extended-release tablets and ethanol (240 mL of 20% or 4% ethanol).
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In vitro studies have demonstrated that oxymorphone hydrochloride extended-release tablets does not release oxymorphone more
rapidly in 500 mL of 0.1N HCl solutions containing ethanol (4%, 20%, and 40%),
Instruct patients to avoid use of alcohol when taking OPANA ER.
In vitro studies revealed little to no biotransformation of oxymorphone to 6-OH-oxymorphone by any of the major cytochrome P450
(CYP P450) isoforms at therapeutically relevant oxymorphone plasma concentrations.
No inhibition of any of the major CYP P450 isoforms was observed when oxymorphone was incubated with human liver microsomes
at concentrations of ≤15.1 μg/mL. An inhibition of CYP3A4 activity occurred at oxymorphone concentrations ≥45.3 μg/mL.
Therefore, it is not expected that oxymorphone, or its metabolites will act as inhibitors of any of the major CYP P450 enzymes in vivo.
Increases in the activity of the CYP 2C9 and CYP 3A4 isoforms occurred when oxymorphone was incubated with human hepatocytes.
However, clinical drug interaction studies with oxymorphone hydrochloride extended-release tablets showed no induction of CYP450
3A4 or 2C9 enzyme activity, indicating that no dose adjustment for CYP 3A4- or 2C9-mediated drug-drug interactions is required.
13 NONCLINICAL TOXICOLOGY
13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility
Carcinogenesis
No evidence of carcinogenic potential was observed in long-term animal studies in mice and rats. Oxymorphone hydrochloride was
administered to Sprague Dawley rats (2.5, 5, and 10 mg/kg/day in males and 5, 10, and 25 mg/kg/day in females) for 2 years by oral
gavage. Systemic drug exposure (AUC) at the highest doses tested in male and female rats was 4.8 times and 21.2 times the human
exposure at a dose of 20 mg/day, respectively. Oxymorphone hydrochloride was administered to male and female CD-1 mice (10, 25,
75 and 150 mg/kg/day) for 2 years by oral gavage. Systemic drug exposure (AUC) at 150 mg/kg/day in male and female mice was
205 times and 243 times the human exposure at a dose of 20 mg/day, respectively.
Mutagenesis
Oxymorphone hydrochloride was not mutagenic when tested in the in vitro bacterial reverse mutation assay (Ames test), or in an in
vitro mammalian cell chromosome aberration assay performed with human peripheral blood lymphocytes. Oxymorphone
hydrochloride tested positive in both the rat and mouse in vivo micronucleus assays. An increase in micronucleated polychromatic
erythrocytes occurred in mice given doses ≥250 mg/kg and in rats given doses of 20 and 40 mg/kg. A subsequent study demonstrated
that oxymorphone hydrochloride was not aneugenic in mice following administration of up to 500 mg/kg. Additional studies indicate
that the increased incidence of micronucleated polychromatic erythrocytes in rats may be secondary to increased body temperature
following oxymorphone administration. Doses associated with increased micronucleated polychromatic erythrocytes also produce a
marked, rapid increase in body temperature. Pretreatment of animals with sodium salicylate minimized the increase in body
temperature and prevented the increase in micronucleated polychromatic erythrocytes after administration of 40 mg/kg oxymorphone.
Impairment of Fertility
Female rats were treated with oxymorphone hydrochloride beginning 14 days prior to mating through Gestation Day 7 via oral gavage
doses of 5, 10, or 25 mg/kg/day (2.4, 4.9, or 12.2 times the human daily dose of 20 mg/day based on body surface area, respectively).
Male rats were treated via oral gavage with the same oxymorphone hydrochloride doses beginning 28 days prior to and throughout
mating. In female rats, an increase in the length of the estrus cycle and decrease in the mean number of viable embryos, implantation
sites and corpora lutea were observed at 4.9 times the human dose of 20 mg/day. No adverse effects of oxymorphone on male
reproductive function or sperm parameters were observed.
14 CLINICAL STUDIES
The efficacy and safety of oxymorphone hydrochloride extended-release tablets have been evaluated in double-blind, controlled
clinical trials in opioid-naïve and opioid-experienced patients with moderate to severe pain including low back pain.
12-Week Study in Opioid-Naïve Patients with Low Back Pain
Patients with chronic low back pain who were suboptimally responsive to their non-opioid therapy entered a 4-week, open-label dose
titration phase. Patients initiated therapy with two days of treatment with oxymorphone hydrochloride extended-release tablets 5 mg,
every 12 hours. Thereafter, patients were titrated to a stabilized dose, at increments of 5 to 10 mg every 12 hours every 3 to 7 days. Of
the patients who were able to stabilize within the Open-Label Titration Period, the mean±SD VAS score at Screening was 69.4±11.8
mm and at Baseline (beginning of Double-Blind Period) were 18.5±11.2 mm and 19.3±11.3 mm for the oxymorphone ER and placebo
groups, respectively. Sixty three percent of the patients enrolled were able to titrate to a tolerable dose and were randomized into a
12-week double-blind treatment phase with placebo or their stabilized dose of oxymorphone hydrochloride extended-release tablets.
The mean±SD stabilized doses were 39.2±26.4 mg and 40.9±25.3 mg for the oxymorphone hydrochloride extended-release tablets and
placebo groups, respectively; total daily doses ranged from 10 to 140 mg. During the first 4 days of double-blind treatment patients
were allowed an unlimited number of OPANA, an immediate-release (IR) formulation of oxymorphone, 5 mg tablets, every 4-6 hours
as supplemental analgesia; thereafter the number of OPANA was limited to two tablets per day. This served as a tapering method to
minimize opioid withdrawal symptoms in placebo patients. Sixty-eight percent of patients treated with oxymorphone hydrochloride
Reference ID: 4028719
extended-release tablets completed the 12-week treatment compared to 47% of patients treated with placebo. Oxymorphone
hydrochloride extended-release tablets provided superior analgesia compared to placebo. The analgesic effect of oxymorphone
hydrochloride extended-release tablets was maintained throughout the double-blind treatment period in 89% of patients who
completed the study. These patients reported a decrease, no change, or a ≤10 mm increase in VAS score from Day 7 until the end of
the study.
The proportion of patients with various degrees of improvement from screening to study endpoint is shown in Figure 1. The figure is
cumulative, so that patients whose change from baseline is, for example, 30%, are also included at every level of improvement below
30%. Patients who did not complete the study were assigned 0% improvement.
Figure 1: Percent Reduction in Average Pain Intensity from Screening to Final Visit
12-Week Study in Opioid-Experienced Patients with Low Back Pain
Patients on chronic opioid therapy entered a 4-week, open-label titration phase with oxymorphone hydrochloride extended-release
tablets dosed every 12 hours at an approximated equianalgesic dose of their pre-study opioid medication. Of the patients who were
able to stabilize within the Open-Label Titration Period, the mean±SD VAS score at Screening was 69.5±17.0 mm and at Baseline
(beginning of Double-Blind Period) were 23.9±12.1 mm and 22.2±10.8 mm for the oxymorphone ER and placebo groups,
respectively. Stabilized patients entered a 12-week double-blind treatment phase with placebo or their stabilized dose of
oxymorphone hydrochloride extended-release tablets. The mean±SD stabilized doses were 80.9±59.3 mg and 93.3±61.3 mg for the
oxymorphone hydrochloride extended-release tablets and placebo groups, respectively; total daily doses ranged from 20-260 mg.
During the first 4 days of double-blind treatment, patients were allowed an unlimited number of OPANA 5 mg tablets, every 4-6 hours
as supplemental analgesia; thereafter the number of OPANA was limited to two tablets per day. This served as a tapering method to
minimize opioid withdrawal symptoms in placebo patients. Fifty seven percent of patients were titrated to a stabilized dose within
approximately 4 weeks of oxymorphone hydrochloride extended-release tablets dose titration. Seventy percent of patients treated with
oxymorphone hydrochloride extended-release tablets and 26% of patients treated with placebo completed the 12-week treatment.
Oxymorphone hydrochloride extended-release tablets provided superior analgesia compared to placebo. The analgesic effect of
oxymorphone hydrochloride extended-release tablets was maintained throughout the double-blind treatment period in 80 % of patients
who completed the study. These patients reported a decrease, no change, or a ≤10 mm increase in VAS score from Day 7 until the end
of the study.
The proportion of patients with various degrees of improvement from screening to study endpoint is shown in Figure 2. The figure is
cumulative, so that patients whose change from baseline is, for example, 30%, are also included at every level of improvement below
30%. Patients who did not complete the study were assigned 0% improvement.
Reference ID: 4028719
Figure 2: Percent Reduction in Average Pain Intensity from Screening to Final Visit
16 HOW SUPPLIED/STORAGE AND HANDLING
OPANA ER extended-release tablets are supplied as follows:
5 mg
Pink, round, film-coated, biconcave extended-release tablets debossed with an “E” on one side and a “5” on the other side.
Bottles of 60 with child-resistant closure NDC 63481-812-60
Bottles of 100 with child-resistant closure NDC 63481-812-70
Unit-Dose package of 20 tablets
(2 blister cards of 10 tablets, not child-resistant,
for hospital use only) NDC 63481-812-20
7.5 mg
Gray, round, film coated, biconcave extended-release tablets debossed with an “E” on one side and a “7 ½” on the other side.
Bottles of 60 with child-resistant closure NDC 63481-813-60
Bottles of 100 with child-resistant closure NDC 63481-813-70
Unit-Dose package of 20 tablets
(2 blister cards of 10 tablets, not child-resistant,
for hospital use only) NDC 63481-813-20
10 mg
Light orange, round, film-coated, biconcave extended-release tablets debossed with an “E” on one side and a “10” on the other side.
Bottles of 60 with child-resistant closure NDC 63481-814-60
Bottles of 100 with child-resistant closure NDC 63481-814-70
Unit-Dose package of 20 tablets
(2 blister cards of 10 tablets, not child-resistant,
for hospital use only) NDC 63481-814-20
15 mg
White, round, film-coated, biconcave extended-release tablets debossed with an “E” on one side and a “15” on the other side.
Bottles of 60 with child-resistant closure NDC 63481-815-60
Bottles of 100 with child-resistant closure NDC 63481-815-70
Unit-Dose package of 20 tablets
(2 blister cards of 10 tablets, not child-resistant,
for hospital use only) NDC 63481-815-20
Reference ID: 4028719
20 mg
Light green, round, film-coated, biconcave extended-release tablets debossed with an “E” on one side and a “20” on the other side.
Bottles of 60 with child-resistant closure NDC 63481-816-60
Bottles of 100 with child-resistant closure NDC 63481-816-70
Unit-Dose package of 20 tablets
(2 blister cards of 10 tablets, not child-resistant,
for hospital use only) NDC 63481-816-20
30 mg
Red, round, film-coated, biconcave extended-release tablets debossed with an “E” on one side and a “30” on the other side.
Bottles of 60 with child-resistant closure NDC 63481-817-60
Bottles of 100 with child-resistant closure NDC 63481-817-70
Unit-Dose package of 20 tablets
(2 blister cards of 10 tablets, not child-resistant,
for hospital use only) NDC 63481-817-20
40 mg
Light yellow to pale yellow, round, film-coated, biconcave extended-release tablets debossed with an “E” on one side and a “40” on
the other side.
Bottles of 60 with child-resistant closure NDC 63481-818-60
Bottles of 100 with child-resistant closure NDC 63481-818-70
Unit-Dose package of 20 tablets
(2 blister cards of 10 tablets, not child-resistant,
for hospital use only) NDC 63481-818-20
Store at 25°C (77°F); excursions permitted to 15°-30°C (59°-86°F). [See USP Controlled Room Temperature].
Dispense in tight container as defined in the USP, with a child-resistant closure (as required).
17 PATIENT COUNSELING INFORMATION
Advise the patient to read the FDA-approved patient labeling (Medication Guide).
Addiction, Abuse, and Misuse
Inform patients that the use of OPANA ER, even when taken as recommended, can result in addiction, abuse, and misuse, which can
lead to overdose or death [see Warnings and Precautions (5.1)]. Instruct patients not to share OPANA ER with others and to take
steps to protect OPANA ER from theft or misuse.
Life-Threatening Respiratory Depression
Inform patients of the risk of life-threatening respiratory depression, including information that the risk is greatest when starting
OPANA ER or when the dosage is increased, and that it can occur even at recommended doses [see Warnings and Precautions (5.2)].
Advise patients how to recognize respiratory depression and to seek medical attention if breathing difficulties develop.
Accidental Ingestion
Inform patients that accidental ingestion, especially by children, may result in respiratory depression or death [see Warnings and
Precautions (5.2)]. Instruct patients to take steps to store OPANA ER securely and to dispose of unused OPANA ER by flushing the
tablets down the toilet.
Interactions with Benzodiazepines and other CNS Depressants
Inform patients and caregivers that potentially fatal additive effects may occur if OPANA ER is used with benzodiazepines or other
CNS depressants, including alcohol, and not to use these concomitantly unless supervised by a health care provider [see Warnings and
Precautions (5.4), Drug Interactions (7)].
Instruct patients not to consume alcoholic beverages, as well as prescription and over-the-counter products that contain alcohol, during
treatment with OPANA ER. The co-ingestion of alcohol with OPANA ER may result in increased plasma levels and a potentially
fatal overdose of oxymorphone [see Warnings and Precautions (5.4)].
Anaphylaxis, Angioedema, and Other Hypersensitivity Reactions
Inform patients that anaphylaxis and other hypersensitivity reactions have been reported with ingredients contained in OPANA ER.
Advise patients how to recognize such a reaction and when to seek medical attention [see Contraindications (4), Warnings and
Precautions (5.6), Adverse Reactions (6)].
Reference ID: 4028719
Serotonin Syndrome
Inform patients that OPANA ER could cause a rare but potentially life-threatening condition resulting from concomitant
administration of serotonergic drugs. Warn patients of the symptoms of serotonin syndrome and to seek medical attention right away
if symptoms develop. Instruct patients to inform their healthcare providers if they are taking, or plan to take serotonergic medications
[see Drug Interactions (7)].
MAOI Interaction
Inform patients to avoid taking OPANA ER while using any drugs that inhibit monoamine oxidase. Patients should not start MAOIs
while taking OPANA ER [see Drug Interactions (7)].
Adrenal Insufficiency
Inform patients that opioids could cause adrenal insufficiency, a potentially life-threatening condition. Adrenal insufficiency may
present with non-specific symptoms and signs such as nausea, vomiting, anorexia, fatigue, weakness, dizziness, and low blood
pressure. Advise patients to seek medical attention if they experience a constellation of these symptoms [see Warnings and
Precautions (5.7)].
Important Administration Instructions
Instruct patients how to properly take OPANA ER, including the following:
• OPANA ER is designed to work properly only if swallowed intact. Taking cut, broken, chewed, crushed, or dissolved OPANA
ER tablets can result in a fatal overdose [see Dosage and Administration (2.1)].
• OPANA ER tablets should be taken one tablet at a time [see Dosage and Administration (2.1)].
• Do not pre-soak, lick or otherwise wet the tablet prior to placing in the mouth [see Dosage and Administration (2.1)].
• Take each tablet with enough water to ensure complete swallowing immediately after placing in the mouth [see Dosage and
Administration (2.1)].
• Occasionally, the inactive ingredients of OPANA ER may be eliminated as a soft mass in the stool that may resemble the original
tablet. Inform patients that the active medication has already been absorbed by the time the patient sees the soft mass.
• Use OPANA ER exactly as prescribed to reduce the risk of life-threatening adverse reactions (e.g., respiratory depression) [see
Dosage and Administration (2), Warnings and Precautions (2.1)].
• Do not discontinue OPANA ER without first discussing the need for a tapering regimen with the prescriber [see Dosage and
Administration (2.4), Warnings and Precautions (5.14)].
Hypotension
Inform patients that OPANA ER may cause orthostatic hypotension and syncope. Instruct patients how to recognize symptoms of low
blood pressure and how to reduce the risk of serious consequences should hypotension occur (e.g., sit or lie down, carefully rise from
a sitting or lying position).
Anaphylaxis
Inform patients that anaphylaxis has been reported with ingredients contained in OPANA ER. Advise patients how to recognize such a
reaction and when to seek medical attention [see Contraindications (4), Adverse Reactions (6)].
Pregnancy
Neonatal Opioid Withdrawal Syndrome
Inform female patients of reproductive potential that prolonged use of OPANA ER during pregnancy can result in neonatal
opioid withdrawal syndrome, which may be life-threatening if not recognized and treated [see Warnings and Precautions
(5.3), Use in Specific Populations (8.1)].
Embryo-Fetal Toxicity
Inform female patients of reproductive potential that OPANA ER can cause fetal harm and to inform their healthcare
provider of a known or suspected pregnancy [see Use in Specific Populations (8.1)].
Lactation
Advise patients that breastfeeding is not recommended during treatment with OPANA ER [see Use in Specific Populations (8.2)]
Reference ID: 4028719
Infertility
Inform patients that chronic use of opioids may cause reduced fertility. It is not known whether these effects on fertility are reversible
[see Adverse Reactions (6.2), Use in Specific Populations (8.3)].
Driving or Operating Heavy Machinery
Inform patients that OPANA ER may impair the ability to perform potentially hazardous activities such as driving a car or operating
heavy machinery. Advise patients not to perform such tasks until they know how they will react to the medication [see Warnings and
Precautions (5.15)].
Constipation
Advise patients of the potential for severe constipation, including management instructions and when to seek medical attention [see
Adverse Reactions (6), Clinical Pharmacology (12.2)].
Disposal of Unused OPANA ER
Advise patients to flush the unused tablets down the toilet when OPANA ER is no longer needed.
Distributed by:
Endo Pharmaceuticals Inc.
Malvern, PA 19355
Manufactured by:
Pharmaceuticals Manufacturing Research Services Inc.
Horsham, PA 19044
INTAC® is a registered trademark of the Grünenthal Group
© 2016 Endo Pharmaceuticals Inc. All rights reserved.
117835
Reference ID: 4028719
Medication Guide
OPANA®ER (Ō-pan-a) (oxymorphone hydrochloride) extended-release tablets, for oral use, CII
OPANA ER is:
• A strong prescription pain medicine that contains an opioid (narcotic) that is used to manage pain severe enough
to require daily around-the-clock, long-term treatment with an opioid, when other pain treatments such as nonopioid
pain medicines or immediate-release opioid medicines do not treat your pain well enough or you cannot
tolerate them.
• A long-acting (extended-release) opioid pain medicine that can put you at risk for overdose and death. Even if
you take your dose correctly as prescribed you are at risk for opioid addiction, abuse, and misuse that can lead
to death.
• Not for use to treat pain that is not around-the-clock.
Important information about OPANA ER:
• Get emergency help right away if you take too much OPANA ER (overdose). When you first start taking
OPANA ER, when your dose is changed, or if you take too much (overdose), serious or life-threatening breathing
problems that can lead to death may occur.
• Taking OPANA ER with other opioid medicines, benzodiazepines, alcohol, or other central nervous system depressants
(including street drugs) can cause severe drowsiness, decreased awareness, breathing problems, coma, and death.
• Never give anyone your OPANA ER. They could die from taking it. Store OPANA ER away from children and in a safe
place to prevent stealing or abuse. Selling or giving away OPANA ER is against the law.
Do not take OPANA ER if you have:
• severe asthma, trouble breathing, or other lung problems.
• a bowel blockage or have narrowing of the stomach or intestines.
Before taking OPANA ER, tell your healthcare provider if you have a history of:
• head injury, seizures ● liver, kidney, thyroid problems
• problems urinating ● pancreas or gallbladder problems
• abuse of street or prescription drugs, alcohol addiction, or mental health problems.
Tell your healthcare provider if you are:
• pregnant or planning to become pregnant. Prolonged use of OPANA ER during pregnancy can cause withdrawal
symptoms in your newborn baby that could be life-threatening if not recognized and treated.
• breastfeeding. Not recommended during treatment with OPANA ER. It may harm your baby.
• taking prescription or over-the-counter medicines, vitamins, or herbal supplements. Taking OPANA ER with certain
other medicines can cause serious side effects that could lead to death.
When taking OPANA ER:
• Do not change your dose. Take OPANA ER exactly as prescribed by your healthcare provider. Use the lowest dose
possible for the shortest time needed.
• Take your prescribed dose every 12 hours at the same time every day on an empty stomach, at least 1 hour
before or 2 hours after meals. Do not take more than your prescribed dose in 24 hours. If you miss a dose, take
your next dose at your usual time.
• Swallow OPANA ER whole. Do not cut, break, chew, crush, dissolve, snort, or inject OPANA ER because this may
cause you to overdose and die.
• To avoid choking on the tablet OPANA ER should be taken 1 tablet at a time. Do not pre-soak, lick, or wet the
tablet before placing in your mouth.
• Call your healthcare provider if the dose you are taking does not control your pain.
• Do not stop taking OPANA ER without talking to your healthcare provider.
• After you stop taking OPANA ER, flush any unused tablets down the toilet.
While taking OPANA ER DO NOT:
• Drive or operate heavy machinery, until you know how OPANA ER affects you. OPANA ER can make you sleepy,
dizzy, or lightheaded.
• Drink alcohol or use prescription or over-the-counter medicines that contain alcohol. Using products containing
alcohol during treatment with OPANA ER may cause you to overdose and die.
The possible side effects of OPANA ER:
• constipation, nausea, sleepiness, vomiting, tiredness, headache, dizziness, abdominal pain. Call your healthcare
provider if you have any of these symptoms and they are severe.
Get emergency medical help if you have:
trouble breathing, shortness of breath, fast heartbeat, chest pain, swelling of your face, tongue or throat, or hands,
hives, itching, rash, extreme drowsiness, light-headedness when changing positions, feeling faint, agitation, high body
temperature, trouble walking, stiff muscles, or mental changes such as confusion.
These are not all the possible side effects of OPANA ER. Call your doctor for medical advice about side effects. You
may report side effects to FDA at class="baec5a81-e4d6-4674-97f3-e9220f0136c1" ="white-space: nowrap;">1-800-FDA-1088. For more information go to dailymed.nlm.nih.gov
Distributed by: Endo Pharmaceuticals Inc., Malvern, PA 19355, www.endo.com or call class="baec5a81-e4d6-4674-97f3-e9220f0136c1" ="white-space: nowrap;">1-800-462-3636
OPANA® is a registered trademark of Endo Pharmaceuticals Inc.
This Medication Guide has been approved by the U.S. Food and Drug Administration.
Revised: December 2016
117836
Reference ID: 4028719
NDC 60760-617-60 CII
OPANA
Extended-Release Tablets
(Oxymorphone HCI)
20 mg
QTY: 60
LOT# XXXXXXX
EXP XX-XX
RX# 0000000
MANUFACTURED BY:
Novartis
Lincoln, NE 68501
60760-617-60
OPANA
Extended-Release Tablets
(Oxymorphone HCI)
20mg
QTY: 60
RX# 0000000
NDC 60760-617-60
LOT# XXXXXXX
EXP XX-XX
St. mary's mpp
PACKAGED BY:
St. Mary's
10860 MAVINEE DR.
ORO VALLEY,AZ 85737
MANAGED PHARMACY PROGRAMS
TAKE AS DIRECTED
Rx only STORE AT CONTROLLED ROOM TEMPERATURE 15 degree - 30 degree C (59 degree -86 degree F).
OPANA ER
oxymorphone hydrochloride tablet, extended release |
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Labeler - St Marys Medical Park Pharmacy (063050751) |
Establishment | |||
Name | Address | ID/FEI | Business Operations |
---|---|---|---|
St Marys Medical Park Pharmacy | 063050751 | relabel(60760-617) , repack(60760-617) |
Establishment | |||
Name | Address | ID/FEI | Business Operations |
---|---|---|---|
Novartis | 129836151 | manufacture(60760-617) |