Answer: benzodiazepines

AnswerCrossword Clue
benzodiazepinesAny of a class of heterocyclic organic compounds used as tranquilizers, such as Librium and Valium
benzodiazepinesBENZODIAZEPINE, any of a group of amines (as diazepam and chlordiazepoxide) used esp as tranquilizers