Learn about Valium (Diazepam Tablets) may treat, uses, dosage, side effects, drug interactions, warnings, patient labeling, Indications & Dosage . Diazepam is subject to Schedule IV control under the Controlled Substances Act of Jun 24, - Explore why these anti-anxiety medications are Schedule IV drugs. Benzodiazepines such as Ativan, Xanax, and Valium are a class of. Benzodiazepines (including diazepam, flunitrazepam and temazepam) Piperazines (including BZP and TFMPP) are Class C, Schedule 1 drugs. It is illegal to.