Definition

Phenobarbital is a barbiturate, a drug that has sedative and hypnotic effects. The drug is classed as a central nervous system agent and subclassed as an anticonvulsant (antiseizure).

Purpose

Phenobarbital is used to control the seizures that occur in epilepsy, and can relieve anxiety. For short-term use, phenobarbital can help those with insomnia fall asleep.

Description

Phenobarbital is available in tablet or capsule form, and as a liquid. All three forms are taken orally one to three times each day with or without food. When taken once a day, the drug is typically taken near bedtime.

Recommended dosage

The dosage is...