MORPHINE SULFATE- morphine sulfate solution, concentrate
Lannett Company, Inc.
HIGHLIGHTS OF PRESCRIBING INFORMATION
These highlights do not include all the information needed to use Morphine Sulfate Oral Solution safely and effectively. See full prescribing information for Morphine Sulfate Oral Solution.
Morphine Sulfate Oral Solution, CII
Initial U.S. Approval: 1984
WARNING: RISK OF MEDICATION ERRORS
See full prescribing information for complete boxed warning
INDICATIONS AND USAGE
Morphine sulfate is an opioid analgesic indicated for the management of moderate to severe acute and chronic pain where an opioid analgesic is appropriate. (1)
Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL) is indicated for the management of moderate to severe acute and chronic pain in opioid-tolerant patients. (1)
DOSAGE AND ADMINISTRATION
DOSAGE FORMS AND STRENGTHS
Oral Solution: Each mL contains 20 mg of morphine sulfate USP. (3)
WARNINGS AND PRECAUTIONS
Most common adverse reactions are constipation, nausea, somnolence, lightheadedness, dizziness, vomiting, sweating. (6)
To report SUSPECTED ADVERSE REACTIONS, contact Lannett Company, Inc. at 1-800-325-9994 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch
USE IN SPECIFIC POPULATIONS
See 17 for PATIENT COUNSELING INFORMATION and Medication Guide.
FULL PRESCRIBING INFORMATION: CONTENTS *
Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL) is an opioid analgesic indicated for the management of moderate to severe acute and chronic pain in opioid-tolerant patients.
Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL) may cause fatal respiratory depression when administered to patients not previously exposed to opioids. Patients considered to be opioid tolerant are those who are taking at least 60 mg oral morphine sulfate per day, or at least 30 mg of oral oxycodone hydrochloride per day, or at least 12 mg hydromorphone hydrochloride per day, or an equianalgesic dose of another opioid, for a week or longer.
Morphine Sulfate Oral Solution is available in multiple concentrations. Take care when prescribing and administering Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL) to avoid dosing errors due to confusion between different concentrations and between mg and mL, which could result in accidental overdose and death. Take care to ensure the proper dose is communicated and dispensed.
When writing prescriptions, include both the total dose in mg and the total dose in volume.
Always use the enclosed calibrated oral syringe when administering Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL) to ensure the dose is measured and administered accurately.
Selection of patients for treatment with morphine sulfate should be governed by the same principles that apply to the use of similar opioid analgesics. Individualize treatment in every case, using non-opioid analgesics, opioids on an as needed basis and/or combination products, and chronic opioid therapy in a progressive plan of pain management such as outlined by the World Health Organization, the Agency for Healthcare Research and Quality, and the American Pain Society.
As with any opioid drug product, 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 morphine sulfate, give attention to the following:
The following dosing recommendations, therefore, can only be considered suggested approaches to what is actually a series of clinical decisions over time in the management of the pain of each individual patient.
Continual re-evaluation of the patient receiving morphine sulfate is important, with special attention to the maintenance of pain control and the relative incidence of side effects associated with therapy. During chronic therapy, especially for non-cancer-related pain, periodically re-assess the continued need for the use of opioid analgesics.
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.
Do not initiate treatment with Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL) in patients who are opioid naïve. Select an alternate product with lower concentration.
Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL) is for use in opioid-tolerant patients only who have already been receiving opioid therapy. Use this strength only for patients that have already been titrated to a stable analgesic regimen using lower strengths of morphine sulfate and who can benefit from use of a smaller volume of oral solution.
There is inter-patient variability in the potency of opioid drugs and opioid formulations. Therefore, a conservative approach is advised when determining the total daily dose of morphine sulfate. It is better to underestimate a patient’s 24-hour oral morphine sulfate dose and make available rescue medication than to overestimate the 24-hour oral morphine sulfate dose and manage an adverse experience of overdose.
Consider the following general points regarding opioid conversions.
Conversion from Parenteral Morphine to Oral Morphine Sulfate
For conversion from parenteral to oral morphine sulfate, anywhere from 3 to 6 mg of oral morphine sulfate may be required to provide pain relief equivalent to 1 mg of parenteral morphine.
Conversion from Parenteral Oral Non-Morphine Opioids to Oral Morphine Sulfate
In converting patients from other opioids to morphine sulfate, close observation and adjustment of dosage based upon the patient’s response to morphine sulfate is imperative. Physicians and other healthcare professionals are advised to refer to published relative potency information, keeping in mind that conversion ratios are only approximate.
Conversion from Controlled-Release Oral Morphine to Oral Morphine Sulfate
For a given dose, the same total amount of morphine sulfate is available from Morphine Sulfate Oral Solution, Morphine Sulfate Tablets, and controlled-release and extended-release morphine sulfate capsules. The extended duration of release of morphine sulfate from controlled-release tablets or extended-release tablets results in reduced maximum and increased minimum plasma morphine sulfate concentrations than with shorter acting morphine sulfate products. Conversion from oral solution or immediate-release tablets to the same total daily dose of controlled-release tablets or extended-release tablets could lead to excessive sedation at peak serum levels. Therefore, dosage adjustment with close observation is necessary.
Continual re-evaluation of the patient receiving morphine sulfate is important, with special attention to the maintenance of pain control and the relative incidence of side effects associated with therapy. If the level of pain increases, effort should be made to identify the source of increased pain, while adjusting the dose as described above to decrease the level of pain. During chronic therapy, especially for non-cancer-related pain (or pain associated with other terminal illnesses), periodically reassess the continued need for the use of opioid analgesics.
Each mL of clear/colorless Morphine Sulfate Oral Solution contains 20 mg of morphine sulfate, USP. The concentration of this solution is 100 mg per 5 mL (20 mg per mL).
Morphine Sulfate Oral Solution is marketed in lower concentrations (e.g. 10 mg per 5 mL and 20 mg per 5 mL). Use caution when prescribing, dispensing, and administering any Morphine Sulfate Oral Solution to avoid dosing errors due to confusion between different concentrations and between mg and mL, which could result in accidental overdose and death. Use caution to ensure the dose is communicated clearly and dispensed accurately. Always use the enclosed calibrated oral syringe when administering Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL) to ensure the dose is measured and administered accurately.
Respiratory depression is the primary risk of morphine sulfate. Respiratory depression occurs more frequently in elderly or debilitated patients and in those suffering from conditions accompanied by hypoxia, hypercapnia, or upper airway obstruction, in whom even moderate therapeutic doses may significantly decrease pulmonary ventilation.
Use morphine sulfate with extreme caution in patients with chronic obstructive pulmonary disease or cor pulmonale and in patients having a substantially decreased respiratory reserve (e.g., severe kyphoscoliosis), hypoxia, hypercapnia, or pre-existing respiratory depression. In such patients, even usual therapeutic doses of morphine sulfate may increase airway resistance and decrease respiratory drive to the point of apnea. Consider alternative non-opioid analgesics, and use morphine sulfate only under careful medical supervision at the lowest effective dose in such patients.
Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL) is for use in opioid-tolerant patients only. Administration of this formulation may cause fatal respiratory depression when administered to patients who are not tolerant to the respiratory depressant effects of opioids.
Morphine sulfate is an opioid agonist and a Schedule II controlled substance. Such drugs are sought by drug abusers and people with addiction disorders. Diversion of Schedule II products is an act subject to criminal penalty.
Morphine sulfate can be abused in a manner similar to other opioid agonists, legal or illicit. This should be considered when prescribing or dispensing morphine sulfate in situations where the physician or pharmacist is concerned about an increased risk of misuse, abuse, or diversion.
Morphine sulfate may be abused by crushing, chewing, snorting or injecting the product. These practices pose a significant risk to the abuser that could result in overdose and death. [See DRUG ABUSE AND DEPENDENCE (9)]
Concerns about abuse, addiction, and diversion should not prevent the proper management of pain. Healthcare professionals should contact their State Professional Licensing Board or State Controlled Substances Authority for information on how to prevent and detect abuse or diversion of this product.
Morphine sulfate 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, profound sedation, coma or death may result.
In the presence of head injury, intracranial lesions or a preexisting increase in intracranial pressure, the possible respiratory depressant effects of morphine sulfate and its potential to elevate cerebrospinal fluid pressure (resulting from vasodilation following CO2 retention) may be markedly exaggerated. Furthermore, morphine sulfate can produce effects on pupillary response and consciousness, which may obscure neurologic signs of further increases in intracranial pressure in patients with head injuries.
Morphine sulfate may cause severe hypotension in an individual whose ability to maintain blood pressure has already been compromised by a depleted blood volume or concurrent administration of drugs such as phenothiazines or general anesthetics. Morphine sulfate may produce orthostatic hypotension and syncope in ambulatory patients.
Administer morphine sulfate with caution to patients in circulatory shock, as vasodilation produced by the drug may further reduce cardiac output and blood pressure.
Do not administer morphine sulfate to patients with gastrointestinal obstruction, especially paralytic ileus because morphine sulfate diminishes propulsive peristaltic waves in the gastrointestinal tract and may prolong the obstruction.
The administration of morphine sulfate may obscure the diagnosis or clinical course in patients with acute abdominal condition.
Use morphine sulfate with caution in patients with biliary tract disease, including acute pancreatitis, as morphine sulfate may cause spasm of the sphincter of Oddi and diminish biliary and pancreatic secretions.
Use morphine sulfate with caution and in reduced dosages in patients with severe renal or hepatic impairment, Addison's disease, hypothyroidism, prostatic hypertrophy, or urethral stricture, and in elderly or debilitated patients. [See USE IN SPECIFIC POPULATIONS (8.5)]
Exercise caution in the administration of morphine sulfate to patients with CNS depression, toxic psychosis, acute alcoholism and delirium tremens.
All opioids may aggravate convulsions in patients with convulsive disorders, and all opioids may induce or aggravate seizures in some clinical settings.
Keep Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL) out of the reach of children. In case of accidental ingestion, seek emergency medical help immediately.
Caution patients that morphine sulfate could impair the mental and/or physical abilities needed to perform potentially hazardous activities such as driving a car or operating machinery.
Caution patients about the potential combined effects of morphine sulfate with other CNS depressants, including other opioids, phenothiazines, sedative/hypnotics and alcohol. [See DRUG INTERACTIONS (7)]
Serious adverse reactions associated with morphine sulfate use include: respiratory depression, apnea, and to a lesser degree, circulatory depression, respiratory arrest, shock and cardiac arrest.
The common adverse reactions seen on initiation of therapy with morphine sulfate are dose-dependent and are typical opioid-related side effects. The most frequent of these include constipation, nausea, and somnolence. Other commonly observed adverse reactions include: lightheadedness, dizziness, sedation, vomiting, and sweating. The frequency of these events depends upon several factors including clinical setting, the patient’s level of opioid tolerance, and host factors specific to the individual. Anticipate and manage these events as part of opioid analgesia therapy.
Other less frequently observed adverse reactions expected from opioid analgesics, including morphine sulfate include:
Body as a Whole: malaise, withdrawal syndrome
Cardiovascular System: bradycardia, hypertension, hypotension, palpitations, syncope, tachycardia
Digestive System: biliary pain, dyspepsia, dysphagia, gastroenteritis, abnormal liver function tests, rectal disorder, thirst
Hemic and Lymphatic System: anemia, thrombocytopenia
Metabolic and Nutritional Disorders: edema, weight loss
Musculoskeletal: skeletal muscle rigidity
Nervous System: abnormal dreams, abnormal gait, agitation, amnesia, anxiety, ataxia, confusion, convulsions, coma, delirium, hallucinations, lethargy, nervousness, abnormal thinking, tremor, vasodilation, vertigo, headache
Respiratory System: hiccup, hypoventilation, voice alteration
Skin and Appendages: dry skin, urticaria, pruritus
Special Senses: amblyopia, eye pain, taste perversion
Urogenital System: abnormal ejaculation, dysuria, impotence, decreased libido, oliguria, urinary retention, anti-diuretic effect
Other central nervous system (CNS) depressants including sedatives, hypnotics, general anesthetics, antiemetics, phenothiazines, or other tranquilizers or alcohol increases the risk of respiratory depression, hypotension, profound sedation, or coma. Use morphine sulfate with caution and in reduced dosages in patients taking these agents.
Morphine sulfate may enhance the neuromuscular blocking action of skeletal muscle relaxants and produce an increased degree of respiratory depression.
Do not administer mixed agonist/antagonist analgesics (i.e., pentazocine, nalbuphine, and butorphanol) to patients who have received or are receiving a course of therapy with a pure opioid agonist analgesic such as morphine sulfate. In these patients, mixed agonist/antagonist analgesics may reduce the analgesic effect and/or may precipitate withdrawal symptoms.
Concomitant administration of morphine sulfate and cimetidine or cimetidine hydrochloride has been reported to precipitate apnea, confusion, and muscle twitching in an isolated report. Monitor patients for increased respiratory and CNS depression when receiving cimetidine or cimetidine hydrochloride concomitantly with morphine sulfate.
MAOIs markedly potentiate the action of morphine sulfate. Allow at least 14 days after stopping treatment with MAOIs before initiating treatment with morphine sulfate.
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.
Animal reproduction studies have not been conducted with morphine sulfate. It is also not known whether morphine sulfate can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. Only give morphine sulfate to a pregnant woman if clearly needed.
In humans, the frequency of congenital anomalies has been reported to be no greater than expected among the children of 70 women who were treated with morphine sulfate during the first four months of pregnancy or in 448 women treated with this drug anytime during pregnancy. Furthermore, no malformations were observed in the infant of a woman who attempted suicide by taking an overdose of morphine sulfate and other medication during the first trimester of pregnancy.
Several literature reports indicate that morphine sulfate administered subcutaneously during the early gestational period in mice and hamsters produced neurological, soft tissue and skeletal abnormalities. With one exception, the effects that have been reported were following doses that were maternally toxic and the abnormalities noted were characteristic to those observed when maternal toxicity is present. In one study, following subcutaneous infusion of doses greater than or equal to 0.15 mg/kg to mice, exencephaly, hydronephrosis, intestinal hemorrhage, split supraoccipital, malformed sternebrae, and malformed xiphoid were noted in the absence of maternal toxicity. In the hamster, morphine sulfate given subcutaneously on gestation day 8 produced exencephaly and cranioschisis. Morphine sulfate was not a significant teratogen in the rat at exposure levels significantly beyond that normally encountered in clinical practice. In one study however, decreased litter size and viability were observed in the offspring of male rats administered morphine intraperitoneally (25 mg/kg) 1 day prior to mating. In two studies performed in the rabbit, no evidence of teratogenicity was reported at subcutaneous doses up to 100 mg/kg.
Controlled studies of chronic in utero morphine exposure in pregnant women have not been conducted. Infants born to mothers who have taken opioids chronically may exhibit withdrawal symptoms following birth, reversible reduction in brain volume, small size, decreased ventilatory response to CO2 and increased risk of sudden infant death syndrome.
Manifestations of the neonatal withdrawal syndrome include irritability, hyperactivity, abnormal sleep pattern, high-pitched cry, tremor, vomiting, diarrhea, weight loss, and failure to gain weight. The time and amount of the mother’s last dose and the rate of elimination of the drug from the newborn may affect the onset, duration, and severity of the disorder. When severe symptoms occur, pharmacologic intervention may be required.
Published literature has reported that exposure to morphine sulfate during pregnancy is associated with reduction in growth and a host of behavioral abnormalities in the offspring of animals. Morphine sulfate treatment during gestational periods of organogenesis in rats, hamsters, guinea pigs and rabbits resulted in the following treatment-related embryotoxicity and neonatal toxicity in one or more studies: decreased litter size, embryo-fetal viability, fetal and neonatal body weights, absolute brain and cerebellar weights, lengths or widths at birth and during the neonatal period, delayed motor and sexual maturation, and increased neonatal mortality, cyanosis and hypothermia. Decreased fertility in female offspring, and decreased plasma and testicular levels of luteinizing hormone and testosterone, decreased testes weights, seminiferous tubule shrinkage, germinal cell aplasia, and decreased spermatogenesis in male offspring were also observed. Behavioral abnormalities resulting from chronic morphine sulfate exposure of fetal animals included altered reflex and motor skill development, mild withdrawal, and altered responsiveness to morphine sulfate persisting into adulthood.
Opioids cross the placenta and may produce respiratory depression and psycho-physiologic effects in neonates. Morphine sulfate is not recommended for use in women during and immediately prior to labor. 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. Closely observe neonates whose mothers received opioid analgesics during labor for signs of respiratory depression. Have a specific opioid antagonist, such as naloxone or nalmefene, available for reversal of opioid-induced respiratory depression in the neonate.
Low levels of morphine have been detected in maternal milk. The milk: plasma morphine AUC ratio is about 2.5:1. The amount of morphine delivered to the infant depends on the plasma concentration of the mother, the amount of milk ingested by the infant, and the extent of first-pass metabolism. Because of the potential for serious adverse reactions in nursing infants from morphine sulfate including respiratory depression, sedation and possibly withdrawal symptoms, upon cessation of morphine sulfate administration to the mother, decide whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother.
The safety and effectiveness and the pharmacokinetics of Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL) in pediatric patients below the age of 18 have not been established.
Elderly patients (aged 65 years or older) may have increased sensitivity to morphine sulfate. In general, use caution when selecting a dose for an elderly patient, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function and of concomitant disease or other drug therapy.
While evidence of greater post-operative morphine sulfate consumption in men compared to women is present in the literature, clinically significant differences in analgesic outcomes and pharmacokinetic parameters have not been consistently demonstrated. Some studies have shown an increased sensitivity to the adverse effects of morphine, including respiratory depression, in women compared to men.
Morphine sulfate pharmacokinetics have been reported to be significantly altered in patients with cirrhosis. Clearance was found to decrease with a corresponding increase in half-life. The morphine-3-glucuronide (M3G) and morphine-6-glucuronide (M6G) to morphine AUC ratios also decreased in these subjects, indicating diminished metabolic activity. Start these patients cautiously with lower doses of morphine sulfate and titrate slowly while carefully monitoring for side effects.
Morphine sulfate pharmacokinetics are altered in patients with renal failure. Clearance is decreased and the metabolites, M3G and M6G, may accumulate to much higher plasma levels in patients with renal failure as compared to patients with normal renal function. Start these patients cautiously with lower doses of morphine sulfate and titrate slowly while carefully monitoring for side effects.
Morphine sulfate is a mu-agonist opioid and is a Schedule II controlled substance. Morphine sulfate, like other opioids used in analgesia, can be abused and is subject to criminal diversion.
Drug addiction is characterized by compulsive use, use for non-medical purposes, and continued use despite harm or risk of harm. Drug addiction is a treatable disease, utilizing a multi-disciplinary approach, but relapse is common.
“Drug-seeking” behavior is very common in 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 “loss” of prescriptions, tampering with prescriptions and reluctance to provide prior medical records or contact information for other treating physician(s). “Doctor shopping” to obtain additional prescriptions is common among drug abusers and people suffering from untreated addiction.
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. The converse is also true. 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. Careful record-keeping of prescribing information, including quantity, frequency, and renewal requests is strongly advised.
Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL) is intended for oral use only. Abuse of morphine sulfate poses a risk of overdose and death. The risk is increased with concurrent abuse of alcohol and other substances. Parenteral drug abuse is commonly associated with transmission of infectious diseases 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.
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 (8.2)]
Tolerance to opioids 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 first sign of tolerance is usually a reduced duration of effect. Tolerance to different effects of opioids may develop to varying degrees and at varying rates in a given individual. Physical dependence is manifested by withdrawal symptoms after abrupt discontinuation of a drug or upon administration of an antagonist. Physical dependence and tolerance are frequent during chronic opioid therapy.
The opioid abstinence or withdrawal syndrome is characterized by some or all of the following: 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.
In general, taper opioids rather than abruptly discontinue. [See DOSAGE AND ADMINISTRATION (2.5)]
Acute overdosage with morphine sulfate is manifested 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, in some cases, pulmonary edema, bradycardia, hypotension, cardiac arrest and death.
Morphine 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)]
Give primary attention to re-establishment of a patent airway and institution of assisted or controlled ventilation. Employ supportive measures (including oxygen and vasopressors) in the management of circulatory shock and pulmonary edema accompanying overdose as indicated. Cardiac arrest or arrhythmias may require cardiac massage or defibrillation.
The pure opioid antagonists, naloxone or nalmefene, are specific antidotes to respiratory depression resulting from opioid overdose. Since the duration of reversal is expected to be less than the duration of action of morphine sulfate, carefully monitor the patient until spontaneous respiration is reliably re-established. If the response to opioid antagonists is sub-optimal or only brief in nature, administer additional antagonist as directed by the manufacturer of the product.
Do not administer opioid antagonists in the absence of clinically significant respiratory or circulatory depression secondary to morphine sulfate overdose.
Administer such agents cautiously to persons who are known, or suspected to be physically dependent on morphine sulfate. 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 symptoms experienced will depend on the degree of physical dependence and the dose of the antagonist administered. Reserve use of an opioid antagonist for cases where such treatment is clearly needed. If it is necessary to treat serious respiratory depression in the physically dependent patient, initiate administration of the antagonist with care and titrate with smaller than usual doses.
Chemically, morphine sulfate is 7,8-didehydro-4,5 alpha-epoxy-17 methyl-morphinan-3,6 alpha-diol sulfate (2:1) (salt) pentahydrate with a molecular mass of 758. Morphine sulfate occurs as white, feathery, silky crystals; cubical masses of crystal; or white crystalline powder. It is soluble in water and slightly soluble in alcohol, but is practically insoluble in chloroform or ether. The octanol:water partition coefficient of morphine is 1.42 at physiologic pH and the pKa is 7.9 for the tertiary nitrogen (the majority is ionized at pH 7.4).
Each mL of oral solution contains 20 mg of morphine sulfate, USP and the following inactive ingredients: anhydrous citric acid, edetate disodium dihydrate, glycerin, methylparaben, propylparaben, sodium benzoate, sorbitol and purified water.
Morphine, a pure opioid agonist, is relatively selective for the mu receptor, although it can interact with other opioid receptors at higher doses. In addition to analgesia, the widely diverse effects of morphine sulfate include drowsiness, changes in mood, respiratory depression, decreased gastrointestinal motility, nausea, vomiting, and alterations of the endocrine and autonomic nervous system.
Effects on the Central Nervous System (CNS)
The principal therapeutic action of morphine is analgesia. Other therapeutic effects of morphine include anxiolysis, euphoria and feelings of relaxation. Although the precise mechanism of the analgesic action is unknown, specific 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 common with other opioids, morphine causes respiratory depression, in part by a direct effect on the brainstem respiratory centers. Morphine and related opioids depress the cough reflex by direct effect on the cough center in the medulla.
Morphine causes miosis, even in total darkness.
Effects on the Gastrointestinal Tract and on Other Smooth Muscle
Gastric, biliary and pancreatic secretions are decreased by morphine. Morphine 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. Morphine can cause a marked increase in biliary tract pressure as a result of spasm of the sphincter of Oddi. Morphine may also cause spasm of the sphincter of the urinary bladder.
Effects on the Cardiovascular System
In therapeutic doses, morphine does not usually exert major effects on the cardiovascular system. Morphine produces peripheral vasodilation which may result in orthostatic hypotension and fainting. Release of histamine can occur, which may play a role in opioid-induced hypotension. Manifestations of histamine release and/or peripheral vasodilation may include pruritus, flushing, red eyes and sweating.
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.
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.
Morphine concentrations are not predictive of analgesic response, especially in patients previously treated with opioids. The minimum effective concentration varies widely and is influenced by a variety of factors, including the extent of previous opioid use, age and general medical condition. Effective doses in tolerant patients may be significantly higher than in opioid-naïve patients.
Morphine, when administered as morphine sulfate, is about two-thirds absorbed from the gastrointestinal tract with the maximum analgesic effect occurring 60 minutes post-administration. The oral bioavailability of morphine, when administered as morphine sulfate, is less than 40% and shows large inter-individual variability due to extensive pre-systemic metabolism.
Presence of food is not expected to significantly impact absorption of morphine from Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL). The concurrent intake of a high-fat, high-calorie meal enhanced the extent of absorption (about 16% increase in AUC), reduced the rate of absorption (about 25% decrease in Cmax), and delayed the Tmax (from 0.58 to 0.75 h) of morphine from the Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL).
Steady-state levels of morphine with Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL) are expected to be achieved within 48 hours.
Once absorbed, morphine is distributed to skeletal muscle, kidneys, liver, intestinal tract, lungs, spleen and brain. Although the primary site of action is the CNS, only small quantities cross the blood-brain barrier. Morphine also crosses the placental membranes and has been found in breast milk. The volume of distribution of morphine is approximately 1 to 6 L/kg, and morphine is 20 to 35% reversibly bound to plasma proteins.
The major pathway of morphine detoxification is conjugation, either with D-glucuronic acid to produce glucuronides or with sulfuric acid to produce morphine-3-etheral sulfate. While a small fraction (less than 5%) of morphine is demethylated, virtually all morphine is converted by hepatic metabolism to the morphine-3-glucuronide (M3G) and morphine-6-glucuronide (M6G) metabolites (about 50% and 15%, respectively). M6G has been shown to have analgesic activity but crosses the blood-brain barrier poorly, while M3G has no significant analgesic activity.
Most of a dose of morphine sulfate is excreted in urine as M3G and M6G, with elimination of morphine occurring primarily as renal excretion of M3G. Approximately 10% of the dose is excreted unchanged in urine. A small amount of glucuronide conjugates are excreted in bile, with minor enterohepatic recycling. Seven to 10% of administered morphine sulfate is excreted in the feces.
The mean adult plasma clearance is approximately 20 to 30 mL/min/kg. The effective terminal half-life of morphine after intravenous administration is reported to be approximately 2 hours. In some studies involving longer periods of plasma sampling, a longer terminal half-life of morphine of about 15 hours was reported.
There may be some pharmacokinetic differences associated with race. In one published study, Chinese subjects given intravenous morphine sulfate had a higher clearance when compared to Caucasian subjects (1852 +/- 116 mL/min compared to 1495 +/- 80 mL/min).
Studies in animals to evaluate the carcinogenic potential of morphine sulfate have not been conducted. No formal studies to assess the mutagenic potential of morphine sulfate have been conducted. In the published literature, the results of in vitro studies showed that morphine sulfate is non-mutagenic in the Drosophila melanogaster lethal mutation assay and produced no evidence of chromosomal aberrations when incubated with murine splenocytes. Contrary to these results, morphine sulfate was found to increase DNA fragmentation when incubated in vitro with a human lymphoma line. In vivo, morphine sulfate has been reported to produce an increase in the frequency of micronuclei in bone marrow cells and immature red blood cells in the mouse micronucleus test and to induce chromosomal aberrations in murine lymphocytes and spermatids. Some of the in vivo clastogenic effects reported with morphine sulfate in mice may be directly related to increases in glucocorticoid levels produced by morphine sulfate in this species.
A literature report indicated that morphine sulfate impairs fertility in rats. In a fertility study in which male rats were administered morphine sulfate subcutaneous prior to mating (up to 30 mg/kg twice daily) and during mating (20 mg/kg twice daily) with untreated females, a number of adverse reproductive effects were observed. These included reduction in total pregnancies, higher incidence of pseudopregnancies, and reduction in implantation sites.
Morphine Sulfate Oral Solution
Morphine Sulfate Oral Solution 100 mg per 5 mL (20 mg per mL) is a clear/colorless solution available as follows:
100 mg per 5 mL (20 mg per mL) Oral Solution
NDC 0527-1425-35: Bottles of 15 mL with an oral syringe
NDC 0527-1425-36: Bottles of 30 mL with an oral syringe
NDC 0527-1425-62: Bottles of 120 mL with an oral syringe
NDC 0527-1425-63: Bottles of 240 mL with an oral syringe
Store at Controlled Room Temperature, 15° to 30°C (59° to 86°F).
PROTECT FROM MOISTURE.
All opioids are liable to diversion and misuse both by the general public and healthcare workers and should be handled accordingly.
See Medication Guide
Provide the following information to patients receiving morphine sulfate or their caregivers:
Cody Laboratories, Inc.
Cody, WY 82414
Lannett Company, Inc.
Philadelphia, PA 19136
Made in the USA
Revised 10/2012; Revision 3
MORPHINE SULFATE CII
100 mg per 5 mL
ONLY FOR USE IN PATIENTS
WHO ARE OPIOID TOLERANT
Pharmacist: Must dispense the enclosed
Medication Guide to each patient.
use the oral syringe provided to measure each
dose of Morphine Sulfate Oral Solution.
15 mL BOTTLE and ORAL SYRINGE
Morphine Sulfate (mor-pheen) (CII)
IMPORTANT: Keep Morphine Sulfate Oral Solution in a safe place away from children. Accidental use by a child is a medical emergency and can cause death. If a child accidentally takes Morphine Sulfate Oral Solution, get emergency help right away.
Read this Medication Guide that comes with Morphine Sulfate Oral Solution before you start taking it and each time you get a new prescription. There may be new information. This Medication Guide does not take the place of talking with your healthcare provider about your medical condition or your treatment.
What is the most important information I should know about Morphine Sulfate Oral Solution?
Morphine Sulfate Oral Solution can cause serious side effects, including death.
What is Morphine Sulfate Oral Solution?
Morphine Sulfate Oral Solution is in a group of drugs called narcotic pain medicine. Morphine Sulfate Oral Solution is only for adults who have moderate to severe pain.
Who should not take Morphine Sulfate Oral Solution?
Do not take Morphine Sulfate Oral Solution if you:
What should I tell my healthcare provider before taking Morphine Sulfate Oral Solution?
Before taking Morphine Sulfate Oral Solution, tell your healthcare provider if you:
Tell your healthcare provider about all the medicines you take, including prescription and non-prescription medicines, vitamins, and herbal supplements. Sometimes the doses of medicines that you take with Morphine Sulfate Oral Solution may need to be changed if used together. Morphine Sulfate Oral Solution and other medicines may affect each other causing serious side effects. Be especially careful about taking other medicines that make you sleepy such as:
Ask your healthcare provider if you are not sure if your medicine is one listed above.
Know the medicines you take. Keep a list of them and show it to your healthcare provider and pharmacist when you get a new medicine.
How should I take Morphine Sulfate Oral Solution?
Talk with your healthcare provider regularly about your pain to see if you still need to take Morphine Sulfate Oral Solution.
What should I avoid while taking Morphine Sulfate Oral Solution?
What are the possible side effects of Morphine Sulfate Oral Solution?
See “What is the most important information I should know about Morphine Sulfate Oral Solution?”
Morphine Sulfate Oral Solution can cause serious breathing problems that can become life-threatening, especially if Morphine Sulfate Oral Solution is used the wrong way. Call your healthcare provider or get help right away if:
These can be symptoms that you have taken too much Morphine Sulfate Oral Solution (overdose) or the dose is too high for you. These symptoms may lead to serious problems or death if not treated right away.
Call your healthcare provider if you have any of the symptoms listed above.
Common side effects of Morphine Sulfate Oral Solution include:
Constipation (not often enough or hard bowel movements) is a very common side effect of pain medicines (opioids) including Morphine Sulfate Oral Solution. Talk to your healthcare provider about dietary changes, and the use of laxatives (medicines to treat constipation) and stool softeners to prevent or treat constipation while taking Morphine Sulfate Oral Solution.
Tell your healthcare provider if you have any side effect that bothers you or that does not go away.
These are not all the possible side effects of Morphine Sulfate Oral Solution. For more information, ask your healthcare provider or pharmacist.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
How should I store Morphine Sulfate Oral Solution?
Keep Morphine Sulfate Oral Solution out of the reach of children. Accidental overdose by a child is a medical emergency and can lead to death.
General information about Morphine Sulfate Oral Solution
Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use Morphine Sulfate Oral Solution for a condition for which it was not prescribed. Do not give Morphine Sulfate Oral Solution to other people, even if they have the same symptoms you have. Selling or giving away Morphine Sulfate Oral Solution may harm others, may cause death, and is against the law.
This Medication Guide summarizes the most important information about Morphine Sulfate Oral Solution. If you would like more information, talk with your healthcare provider. You can ask your healthcare provider or pharmacist for information about Morphine Sulfate Oral Solution that is written for healthcare professionals.
For more information about Morphine Sulfate Oral Solution, go to www.lannett.com or call 1-800- 325-9994.
What are the ingredients in Morphine Sulfate Oral Solution?
Active ingredient: morphine sulfate
Inactive ingredients: anhydrous citric acid, edetate disodium dihydrate, glycerin, methylparaben, propylparaben, sodium benzoate, sorbitol and purified water.
Lannett Company, Inc.
Philadelphia, PA 19136
This Medication Guide has been approved by the U.S. Food and Drug Administration.
Revised: August, 2012
Morphine Sulfate (mor-pheen) (CII)
Oral Solution 100 mg per 5 mL (20 mg per mL)
Important information about measuring Morphine Sulfate Oral Solution:
When dispensed with oral syringe:
See Figure 1 for additional information.
morphine sulfate solution, concentrate
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