noun. Any of a group of barbituric acid derivatives that act as central nervous system depressants and are used as sedatives or hypnotics.

noun. Any salt or ester of barbituric acid.

noun. Any of derivatives of barbituric acid that act as depressants of the central nervous system and are used as sedatives or hypnotics.

noun. organic compound having powerful soporific effect; overdose can be fatal

"JONATHAN ARDEN, MEDICAL EXAMINER, FORENSIC PATHOLOGIST: The sequence of medications you described, first, is thiopental or sodium pentothal, which is an ultra-short-acting barbiturate which is supposed to sedate you, anesthetize you, knock you out."

amphetamine  

sedative-hypnotic  sedative-hypnotic drug  

Nembutal  Pentothal  Seconal  amobarbital  barbital  

Adrenalin  atropine  belladonna  benzodiazepine  benzodiazepines  

Amytal  Amytal pill  Demerol  Dolophine  H