diazepam

noun1

1. •
   A tranquilizing muscle relaxant drug (trademark Valium) used mainly to relieve anxiety.

   • 2001: The most effective anti-anxiety drugs (tranquillizers) are the benzodiazepines, epitomized by diazepam (Valium®). — Leslie Iversen, Drugs: A Very Short Introduction (Oxford 2001, p. 57) — 2001