Classes
DEA Class; Rx
Common Brand Names; Amytal Sodium
- Sedative/Hypnotics;
- Barbiturates
Description
Amobarbital is an oral and IV barbiturate; longer acting than pentobarbital or secobarbital but shorter acting than phenobarbita. Used for insomnia, to relieve preoperative anxiety and produce sedation, and to control seizures. -schedule II controlled substance.
Indications
Indicated for preanesthesia or sedation maintenance.
Contraindications
Hypersensitivity
Patients with history of manifest or latent porphyria
Significant impairment of liver function
Respiratory disease in which dyspnea or obstruction is evident
Adverse Effects
Somnolence
Nervous system: agitation, confusion, hyperkinesia, ataxia, CNS depression, nightmares, nervousness, psychiatric disturbance, hallucinations, insomnia, anxiety, dizziness, abnormality in thinking
Cardiovascular system: Bradycardia, hypotension, syncope
Respiratory system: apnea, hypoventilation, postoperative atelectasis
Digestive system: Constipation, vomiting, nausea
Other adverse effects: Headache, injection site reactions, hypersensitivity reactions, fever, liver damage, megaloblastic anemia following chronic phenobarbital use
Warnings
Habit forming; tolerance and psychological dependence may occur with continued use
Caution in patients that are mentally depressed, have suicide ideation or history of drug abuse and hepatic damage
Rapid administration may cause respiratory depression, apnea, laryngospasm, or vasodilatation with decrease in blood pressure
Parenteral solutions of barbiturates are highly alkaline; care should be taken to avoid perivascular extravasation or intra-arterial injection
Amobarbital may diminish systemic effects of exogenous and endogenous corticosteroids. Administer with caution to patients with borderline hypoadrenal function, regardless of whether it is of pituitary or of primary adrenal origin
Possible impairment of mental and/or physical abilities required for the performance of potentially hazardous tasks, such as driving a car or operating machinery
Concurrent use of barbiturates with other CNS depressants (eg, alcohol, narcotics, tranquilizers, antihistamines) may result in increased CNS-depressant effects
Extravascular injection may cause local tissue damage with subsequent necrosis; consequences of intra-arterial injection may vary from transient pain to gangrene of the limb; any complaint of pain in the limb warrants stopping the injection
Pregnancy and Lactation
Pregnancy Category: D
Lactation: small amounts of barbiturates are excreted in the milk; use caution
Maximum Dosage
1,000 mg/dose IV/IM.
1,000 mg/dose IV/IM.
500 mg/dose IV.
6 to 12 years: 500 mg/dose IV.
1 to 5 years: Safety and efficacy have not been established.
Safety and efficacy have not been established.
Safety and efficacy have not been established.
How supplied
Amobarbital sodium
powder for injection: Schedule II
- 500mg