Aug 11, - And it's not more dangerous than schedule 2 drugs like cocaine and meth. So why Schedule 4: Xanax, Soma, Darvocet, Valium, and Ambien. The FDA started listing drugs by classification, or drug schedules, in carisoprodol (Soma), clonazepam (Klonopin), clorazepate (Tranxene), diazepam (Valium), lorazepam (Ativan), midazolam (Versed), Last updated: August 2, Jun 29, - June 29, 4 min read But what exactly is a Schedule I illegal drug? They include Xanax, Soma, Darvon, Valium, Ativan and Ambien.