A trade name for: the drug phenobarbitone.

A barbiturate with anticonvulsant properties, now used chiefly for the treatment of epilepsy; a tablet of this.

The sedative and hypnotic drug pentobarbital; a capsule of this.

A synthetic sedative-hypnotic and anticonvulsant barbituric drug which is usually used in the form of its sodium salt (more fully pentobarbital sodium…

= phenobarbital, n.

= pentobarbital, n. Also more fully pentobarbitone sodium, sodium pentobarbitone.

A barbiturate compound used (esp. formerly) in the treatment of sleep disorders and pain. Also called Dial, Dial-Ciba (see Dial, n.3).

Phenobarbital; a tablet of this.

A Nembutal capsule.

Phenobarbital.