barbiturate

Any salt or ester of barbituric acid.

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

• Chlorpromazine should be taken with caution in combination with barbiturates, sleeping pills, narcotics, or any other medication which may produce a depressive effect. Avoid alcohol.
• Seconal is the commercial name of the barbiturate quinalbarbitone. Its generic name is secobarbital. […] Dr Iqbal gave her another prescription for barbiturates and, three weeks later, wrote out one more after a telephone conversation.