Label: PHENOBARBITAL tablet

  • NDC Code(s): 0143-1445-01, 0143-1445-05, 0143-1450-01, 0143-1450-05, view more
    0143-1455-01, 0143-1455-05, 0143-1458-01, 0143-1458-05, 0143-1495-01, 0143-1495-05, 0143-1500-01, 0143-1500-05
  • Packager: Hikma Pharmaceuticals USA Inc.
  • Category: HUMAN PRESCRIPTION DRUG LABEL
  • DEA Schedule: CIV
  • Marketing Status: unapproved drug other

DISCLAIMER: This drug has not been found by FDA to be safe and effective, and this labeling has not been approved by FDA. For further information about unapproved drugs, click here.

Drug Label Information

Updated March 5, 2020

If you are a consumer or patient please visit this version.

  • DESCRIPTION

    Phenobarbital is a barbituric acid derivative for oral administration and occurs as a white, odorless, slightly bitter powder that is soluble in chloroform, freely soluble in alcohol or ether, and slightly soluble in water. Its saturated solution has a pH of about 5.6. Chemically, it is 5-ethyl-5-phenylbarbituric acid with the molecular formula C12H12N2O3 (232.24). The structural formula is as follows:

    Phenobarbital-structural formula

    Each Phenobarbital Tablet USP contains 15 mg, 30 mg, 60 mg or 100 mg of phenobarbital, USP.

    Inactive Ingredients are as follows:

    Anhydrous Lactose, Colloidal Silicon Dioxide, Corn Starch, Docusate Sodium with Sodium Benzoate, Lactose Monohydrate, Magnesium Stearate, Microcrystalline Cellulose, and Sodium Starch Glycolate.

  • CLINICAL PHARMACOLOGY

    Phenobarbital, a long-acting barbiturate, is a central nervous system depressant. In ordinary doses, the drug acts as a sedative and anticonvulsant. Its onset of action occurs within 30 minutes, and the duration of action ranges from 5 to 6 hours. It is detoxified in the liver.

  • INDICATIONS AND USAGE

    Phenobarbital Tablets, USP are indicated for use as a sedative or anticonvulsant.

  • CONTRAINDICATIONS

    Phenobarbital is contraindicated in patients who are hypersensitive to barbiturates. In such patients, severe hepatic damage can occur from ordinary doses and is usually associated with dermatitis and involvement of parenchymatous organs. A personal or familial history of acute intermittent porphyria represents one of the few absolute contraindications to the use of barbiturates. Phenobarbital is also contraindicated in patients with marked impairment of liver function, or respiratory disease in which dyspnea or obstruction is evident. It should not be administered to persons with known previous addiction to the sedative/hypnotic group, since ordinary doses may be ineffectual and may contribute to further addiction.

  • WARNINGS

    In small doses, the barbiturates may increase the reaction to painful stimuli. Taken by themselves, the barbiturates cannot be relied upon to relieve pain or even to produce sedation or sleep in the presence of severe pain.

  • PRECAUTIONS

    General Precautions

    Barbiturates induce liver microsomal enzyme activity. This accelerates the biotransformation of various drugs and is probably part of the mechanism of the tolerance encountered with barbiturates. Phenobarbital, therefore, should be used with caution in patients with decreased liver function. This drug should also be administered cautiously to patients with a history of drug dependence or abuse (see DRUG ABUSE AND DEPENDENCE).

    Phenobarbital may decrease the potency of coumarin anticoagulants; therefore, patients receiving such concomitant therapy should have more frequent prothrombin determinations. As with other sedatives and hypnotics, elderly or debilitated patients may react to barbiturates with marked excitement, depression, or confusion.

    The systemic effects of exogenous hydrocortisone and endogenous hydrocortisone (cortisol) may be diminished by phenobarbital. Thus, this product should be administered with caution to patients with borderline hypoadrenal function, regardless of whether it is of pituitary or of primary adrenal origin.

    Information for Patients 

    Phenobarbital may impair the mental and/or physical abilities required for the performance of potentially hazardous tasks, such as driving a car or operating machinery. The patient should be cautioned accordingly.

    Drug Interactions

    Phenobarbital in combination with alcohol, tranquilizers, and other central nervous system depressants has additive depressant effects, and the patient should be so advised. Patients taking this drug should be warned not to exceed the dosage recommended by their physician. Toxic effects and fatalities have occurred following overdoses of phenobarbital alone and in combination with other central nervous system depressants. Caution should be exercised in prescribing unnecessarily large amounts of phenobarbital for patients who have a history of emotional disturbances or suicidal ideation or who have misused alcohol and other CNS drugs (see OVERDOSAGE).

    Usage in Pregnancy

    Pregnancy Category B: Reproduction studies have been performed in animals and have revealed no evidence of impaired fertility or harm to the fetus due to phenobarbital. There are, however, no adequate and well-controlled studies in pregnant women. Because animal reproduction studies are not always predictive of human response, this drug should be used during pregnancy only if clearly needed.

    Nursing Mothers

    Caution should be exercised when phenobarbital is administered to a nursing woman.

  • ADVERSE REACTIONS

    The following adverse reactions have been reported:

    CNS Depression

    Residual sedation or “hangover”, drowsiness, lethargy, and vertigo. Emotional disturbances and phobias may be accentuated. In some persons, barbiturates such as phenobarbital repeatedly produce excitement rather than depression, and the patient may appear to be inebriated. Like other nonanalgesic hypnotic drugs, barbiturates, such as phenobarbital, when given in the presence of pain, may cause restlessness, excitement, and even delirium. Rarely, the use of barbiturates results in localized or diffused myalgic, neuralgic, or arthritic pain, especially in psychoneurotic patients with insomnia. The pain may appear in paroxysms, is most intense in the early morning hours, and is most frequently located in the region of the neck, shoulder girdle, and upper limbs. Symptoms may last for days after the drug is discontinued.

    Respiratory/Circulatory

    Respiratory depression, apnea, circulatory collapse.

    Allergic

    Acquired hypersensitivity to barbiturates consists chiefly in allergic reactions that occur especially in persons who tend to have asthma, urticaria, angioedema, and similar conditions. Hypersensitivity reactions in this category include localized swelling, particularly of the eyelids, cheeks, or lips, and erythematous dermatitis. Rarely, exfoliative dermatitis (e.g., Stevens-Johnson syndrome and toxic epidermal necrolysis) may be caused by phenobarbital and can prove fatal. The skin eruption may be associated with fever, delirium, and marked degenerative changes in the liver and other parenchymatous organs. In a few cases, megaloblastic anemia has been associated with the chronic use of phenobarbital.

    Other

    Nausea and vomiting; headache.

    To report SUSPECTED ADVERSE REACTIONS, contact Hikma Pharmaceuticals USA Inc. at 1-800-962-8364, or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

  • DRUG ABUSE AND DEPENDENCE

    Controlled Substance: Phenobarbital is a Schedule IV drug.

    Dependence

    Prolonged, uninterrupted use of barbiturates (particularly the short-acting drugs), even in therapeutic doses, may result in psychic and physical dependence. Withdrawal symptoms due to physical dependence following chronic use of large doses of barbiturates may include delirium, convulsions, and death.

  • OVERDOSAGE

    The signs and symptoms of barbiturate poisoning are referable especially to the central nervous system and the cardiovascular system. Moderate intoxication resembles alcoholic inebriation. In severe intoxication, the patient is comatose, the level of reflex activity conforming in a general way to the intensity of the central depression. The deep reflexes may persist for some time despite coexistent coma. The Babinski sign is often positive. The EEG may be of the “burst-suppression” type, with brief periods of electrical silence. The pupils may be constricted and react to light, but late in the course of barbiturate poisoning they may show hypoxic paralytic dilatation. Respiration is affected early. Breathing may be either slow or rapid and shallow; Cheyne-Stokes rhythm may be present. Respiratory minute volume is diminished, and hypoxia and respiratory acidosis may develop. The blood pressure falls, owing partly to depression of medullary vasomotor centers; partly to a direct action of the drug on the myocardium, sympathetic ganglia, and vascular smooth muscle; partly to hypoxia.

    The patient thus develops a typical shock syndrome, with a weak and rapid pulse, cold and clammy skin, and a rise in the hematocrit. Respiratory complications (atelectasis, pulmonary edema, and bronchopneumonia) and renal failure are much dreaded and not infrequent concomitant of severe barbiturate poisoning. There is usually hypothermia, sometimes with temperatures as low as 32°C.

    Treatment

    General management should consist of symptomatic and supportive therapy, including gastric lavage, administration of intravenous fluids, and maintenance of blood pressure, body temperature and adequate respiratory exchange. Dialysis will increase the rate of removal of barbiturates from the body fluids. Antibiotics may be required to control pulmonary complications.

  • DOSAGE AND ADMINISTRATION

    Oral Sedative Dose

    Adults: 30 to 120 mg daily in 2 or 3 divided doses.

    Children: 6 mg/kg of body weight daily in 3 divided doses.

    Oral Hypnotic Dose

    Adults: 100 to 320 mg.

    Oral Anticonvulsant Dose,

    Adults: 50 to 100 mg 2 or 3 times daily.

    Children: 15 to 50 mg 2 or 3 times daily.

  • HOW SUPPLIED

    Phenobarbital Tablets, USP 15 mg

    White, Round Tablet; Debossed “WW 445” on one side and plain on the other side.

                  NDC 0143-1445-01: Bottle of 100 tablets 
                  NDC 0143-1445-05: Bottle of 500 tablets  

                  NDC 0143-1495-01: Bottle of 100 tablets 
                  NDC 0143-1495-05: Bottle of 500 tablets  

    Phenobarbital Tablets, USP 30 mg

    White, Round, Scored Tablet; Debossed “WW 450” on one side and Scored on the other side.

    NDC 0143-1450-01: Bottle of 100 tablets   
    NDC 0143-1450-05: Bottle of 500 tablets  

                 NDC 0143-1500-01: Bottle of 100 tablets   
                 NDC 0143-1500-05: Bottle of 500 tablets  

    Phenobarbital Tablets, USP 60 mg

    White, Round Tablet; Debossed “WW 455” on one side and plain on the other side.

                 NDC 0143-1455-01: Bottle of 100 tablets 
                 NDC 0143-1455-05: Bottle of 500 tablets

    Phenobarbital Tablets, USP 100 mg

    White, Round, Scored Tablet; Debossed “WW 458” on one side and Scored on the other side.

                 NDC 0143-1458-01: Bottle of 100 tablets  
                 NDC 0143-1458-05: Bottle of 500 tablets

    Store at 20° to 25°C (68° to 77°F) [See USP Controlled Room Temperature]. Protect from light and moisture.

    Dispense in a tight, light-resistant container as defined in the USP using a child-resistant closure.

    Distr. by:
    Hikma Pharmaceuticals USA Inc.
    Eatontown, NJ 07724

    C50000803/01      Revised July 2019

  • PRINCIPAL DISPLAY PANEL

    NDC 0143-1445-01
    Phenobarbital Tablets USP 
    15 mg
    100 Tablets
    Rx Only

    NDC 0143-1445-01 Phenobarbital Tablets, USP 15 mg 100 Tablets Rx Only
  • PRINCIPAL DISPLAY PANEL

    NDC 0143-1495-01
    Phenobarbital Tablets USP 
    15 mg
    100 Tablets
    Rx Only

    NDC 0143-1495-01 Phenobarbital Tablets, USP 15 mg 100 Tablets Rx Only
  • PRINCIPAL DISPLAY PANEL

    NDC 0143-1450-01
    Phenobarbital Tablets USP 
    30 mg
    100 Tablets
    Rx Only

    NDC 0143-1450-01 Phenobarbital Tablets, USP 30 mg 100 Tablets Rx Only
  • PRINCIPAL DISPLAY PANEL

    NDC 0143-1500-01
    Phenobarbital Tablets USP 
    30 mg
    100 Tablets
    Rx Only

    NDC 0143-1500-01 Phenobarbital Tablets, USP 30 mg 100 Tablets Rx Only
  • PRINCIPAL DISPLAY PANEL

    NDC 0143-1455-01
    Phenobarbital Tablets USP 
    60 mg
    100 Tablets
    Rx Only

    NDC 0143-1455-01 Phenobarbital Tablets, USP 60 mg 100 Tablets Rx Only
  • PRINCIPAL DISPLAY PANEL

    NDC 0143-1458-01
    Phenobarbital Tablets USP 
    100 mg
    100 Tablets
    Rx Only

    NDC 0143-1458-01 Phenobarbital Tablets, USP 100 mg 100 Tablets Rx Only
  • INGREDIENTS AND APPEARANCE
    PHENOBARBITAL 
    phenobarbital tablet
    Product Information
    Product TypeHUMAN PRESCRIPTION DRUGItem Code (Source)NDC:0143-1495
    Route of AdministrationORALDEA ScheduleCIV    
    Active Ingredient/Active Moiety
    Ingredient NameBasis of StrengthStrength
    PHENOBARBITAL (UNII: YQE403BP4D) (PHENOBARBITAL - UNII:YQE403BP4D) PHENOBARBITAL15 mg
    Inactive Ingredients
    Ingredient NameStrength
    CALCIUM STEARATE (UNII: 776XM7047L)  
    SILICON DIOXIDE (UNII: ETJ7Z6XBU4)  
    STARCH, CORN (UNII: O8232NY3SJ)  
    MICROCRYSTALLINE CELLULOSE (UNII: OP1R32D61U)  
    Product Characteristics
    ColorWHITEScoreno score
    ShapeROUNDSize6mm
    FlavorImprint Code WW;445
    Contains    
    Packaging
    #Item CodePackage DescriptionMarketing Start DateMarketing End Date
    1NDC:0143-1495-01100 in 1 BOTTLE; Type 0: Not a Combination Product03/05/2020
    2NDC:0143-1495-05500 in 1 BOTTLE; Type 0: Not a Combination Product03/05/2020
    Marketing Information
    Marketing CategoryApplication Number or Monograph CitationMarketing Start DateMarketing End Date
    UNAPPROVED DRUG OTHER03/05/2020
    PHENOBARBITAL 
    phenobarbital tablet
    Product Information
    Product TypeHUMAN PRESCRIPTION DRUGItem Code (Source)NDC:0143-1500
    Route of AdministrationORALDEA ScheduleCIV    
    Active Ingredient/Active Moiety
    Ingredient NameBasis of StrengthStrength
    PHENOBARBITAL (UNII: YQE403BP4D) (PHENOBARBITAL - UNII:YQE403BP4D) PHENOBARBITAL30 mg
    Inactive Ingredients
    Ingredient NameStrength
    ANHYDROUS LACTOSE (UNII: 3SY5LH9PMK)  
    SILICON DIOXIDE (UNII: ETJ7Z6XBU4)  
    STARCH, CORN (UNII: O8232NY3SJ)  
    DOCUSATE SODIUM (UNII: F05Q2T2JA0)  
    LACTOSE MONOHYDRATE (UNII: EWQ57Q8I5X)  
    MAGNESIUM STEARATE (UNII: 70097M6I30)  
    CELLULOSE, MICROCRYSTALLINE (UNII: OP1R32D61U)  
    SODIUM STARCH GLYCOLATE TYPE A POTATO (UNII: 5856J3G2A2)  
    Product Characteristics
    ColorWHITEScore2 pieces
    ShapeROUNDSize6mm
    FlavorImprint Code WW;450
    Contains    
    Packaging
    #Item CodePackage DescriptionMarketing Start DateMarketing End Date
    1NDC:0143-1500-01100 in 1 BOTTLE; Type 0: Not a Combination Product03/05/2020
    2NDC:0143-1500-05500 in 1 BOTTLE; Type 0: Not a Combination Product03/05/2020
    Marketing Information
    Marketing CategoryApplication Number or Monograph CitationMarketing Start DateMarketing End Date
    UNAPPROVED DRUG OTHER03/05/2020
    PHENOBARBITAL 
    phenobarbital tablet
    Product Information
    Product TypeHUMAN PRESCRIPTION DRUGItem Code (Source)NDC:0143-1455
    Route of AdministrationORALDEA ScheduleCIV    
    Active Ingredient/Active Moiety
    Ingredient NameBasis of StrengthStrength
    PHENOBARBITAL (UNII: YQE403BP4D) (PHENOBARBITAL - UNII:YQE403BP4D) PHENOBARBITAL60 mg
    Inactive Ingredients
    Ingredient NameStrength
    ANHYDROUS LACTOSE (UNII: 3SY5LH9PMK)  
    SILICON DIOXIDE (UNII: ETJ7Z6XBU4)  
    STARCH, CORN (UNII: O8232NY3SJ)  
    DOCUSATE SODIUM (UNII: F05Q2T2JA0)  
    LACTOSE MONOHYDRATE (UNII: EWQ57Q8I5X)  
    MAGNESIUM STEARATE (UNII: 70097M6I30)  
    CELLULOSE, MICROCRYSTALLINE (UNII: OP1R32D61U)  
    SODIUM STARCH GLYCOLATE TYPE A POTATO (UNII: 5856J3G2A2)  
    Product Characteristics
    ColorWHITEScoreno score
    ShapeROUNDSize8mm
    FlavorImprint Code WW;455
    Contains    
    Packaging
    #Item CodePackage DescriptionMarketing Start DateMarketing End Date
    1NDC:0143-1455-01100 in 1 BOTTLE; Type 0: Not a Combination Product01/11/1999
    2NDC:0143-1455-05500 in 1 BOTTLE; Type 0: Not a Combination Product01/11/1999
    Marketing Information
    Marketing CategoryApplication Number or Monograph CitationMarketing Start DateMarketing End Date
    UNAPPROVED DRUG OTHER01/11/1999
    PHENOBARBITAL 
    phenobarbital tablet
    Product Information
    Product TypeHUMAN PRESCRIPTION DRUGItem Code (Source)NDC:0143-1458
    Route of AdministrationORALDEA ScheduleCIV    
    Active Ingredient/Active Moiety
    Ingredient NameBasis of StrengthStrength
    PHENOBARBITAL (UNII: YQE403BP4D) (PHENOBARBITAL - UNII:YQE403BP4D) PHENOBARBITAL100 mg
    Inactive Ingredients
    Ingredient NameStrength
    ANHYDROUS LACTOSE (UNII: 3SY5LH9PMK)  
    SILICON DIOXIDE (UNII: ETJ7Z6XBU4)  
    STARCH, CORN (UNII: O8232NY3SJ)  
    DOCUSATE SODIUM (UNII: F05Q2T2JA0)  
    LACTOSE MONOHYDRATE (UNII: EWQ57Q8I5X)  
    MAGNESIUM STEARATE (UNII: 70097M6I30)  
    CELLULOSE, MICROCRYSTALLINE (UNII: OP1R32D61U)  
    SODIUM STARCH GLYCOLATE TYPE A POTATO (UNII: 5856J3G2A2)  
    Product Characteristics
    ColorWHITEScore2 pieces
    ShapeROUNDSize10mm
    FlavorImprint Code WW;458
    Contains    
    Packaging
    #Item CodePackage DescriptionMarketing Start DateMarketing End Date
    1NDC:0143-1458-01100 in 1 BOTTLE; Type 0: Not a Combination Product01/07/2000
    2NDC:0143-1458-05500 in 1 BOTTLE; Type 0: Not a Combination Product01/07/2000
    Marketing Information
    Marketing CategoryApplication Number or Monograph CitationMarketing Start DateMarketing End Date
    UNAPPROVED DRUG OTHER01/07/2000
    PHENOBARBITAL 
    phenobarbital tablet
    Product Information
    Product TypeHUMAN PRESCRIPTION DRUGItem Code (Source)NDC:0143-1445
    Route of AdministrationORALDEA ScheduleCIV    
    Active Ingredient/Active Moiety
    Ingredient NameBasis of StrengthStrength
    PHENOBARBITAL (UNII: YQE403BP4D) (PHENOBARBITAL - UNII:YQE403BP4D) PHENOBARBITAL15 mg
    Inactive Ingredients
    Ingredient NameStrength
    CALCIUM STEARATE (UNII: 776XM7047L)  
    SILICON DIOXIDE (UNII: ETJ7Z6XBU4)  
    STARCH, CORN (UNII: O8232NY3SJ)  
    MICROCRYSTALLINE CELLULOSE (UNII: OP1R32D61U)  
    Product Characteristics
    ColorWHITEScoreno score
    ShapeROUNDSize6mm
    FlavorImprint Code West;ward;445
    Contains    
    Packaging
    #Item CodePackage DescriptionMarketing Start DateMarketing End Date
    1NDC:0143-1445-01100 in 1 BOTTLE; Type 0: Not a Combination Product03/05/202006/30/2021
    2NDC:0143-1445-05500 in 1 BOTTLE; Type 0: Not a Combination Product03/05/202006/30/2021
    Marketing Information
    Marketing CategoryApplication Number or Monograph CitationMarketing Start DateMarketing End Date
    UNAPPROVED DRUG OTHER03/05/202006/30/2021
    PHENOBARBITAL 
    phenobarbital tablet
    Product Information
    Product TypeHUMAN PRESCRIPTION DRUGItem Code (Source)NDC:0143-1450
    Route of AdministrationORALDEA ScheduleCIV    
    Active Ingredient/Active Moiety
    Ingredient NameBasis of StrengthStrength
    PHENOBARBITAL (UNII: YQE403BP4D) (PHENOBARBITAL - UNII:YQE403BP4D) PHENOBARBITAL30 mg
    Inactive Ingredients
    Ingredient NameStrength
    ANHYDROUS LACTOSE (UNII: 3SY5LH9PMK)  
    SILICON DIOXIDE (UNII: ETJ7Z6XBU4)  
    STARCH, CORN (UNII: O8232NY3SJ)  
    DOCUSATE SODIUM (UNII: F05Q2T2JA0)  
    LACTOSE MONOHYDRATE (UNII: EWQ57Q8I5X)  
    MAGNESIUM STEARATE (UNII: 70097M6I30)  
    CELLULOSE, MICROCRYSTALLINE (UNII: OP1R32D61U)  
    SODIUM STARCH GLYCOLATE TYPE A POTATO (UNII: 5856J3G2A2)  
    Product Characteristics
    ColorWHITEScore2 pieces
    ShapeROUNDSize6mm
    FlavorImprint Code West;ward;450
    Contains    
    Packaging
    #Item CodePackage DescriptionMarketing Start DateMarketing End Date
    1NDC:0143-1450-01100 in 1 BOTTLE; Type 0: Not a Combination Product03/05/202005/31/2021
    2NDC:0143-1450-05500 in 1 BOTTLE; Type 0: Not a Combination Product03/05/202005/31/2021
    Marketing Information
    Marketing CategoryApplication Number or Monograph CitationMarketing Start DateMarketing End Date
    UNAPPROVED DRUG OTHER03/05/202005/31/2021
    Labeler - Hikma Pharmaceuticals USA Inc. (001230762)