Aug 2, - The FDA started listing drugs by classification, or drug schedules, clonazepam (Klonopin), clorazepate (Tranxene), diazepam (Valium). Jun 24, - Explore why these anti-anxiety medications are Schedule IV drugs. Benzodiazepines such as Ativan, Xanax, and Valium are a class of. Diazepam, first marketed as Valium, is a medicine of the benzodiazepine family that typically .. International: diazepam is a Schedule IV controlled drug under the Convention on Psychotropic Substances. UK: classified as a controlled drug, Elimination half-life?: ?20– hours (36– ho.