Jun 1, - List of most commonly encountered drugs currently controlled under the misuse of drugs Drug, Class, Schedule . Lorazepam, C, 4 Pt1. Aug 2, - The FDA started listing drugs by classification, or drug schedules, in Examples of Schedule IV substances include: alprazolam (Xanax). May 26, - The list shows each drug's respective classifications under both the Misuse of Drugs Act and the Misuse of Drugs Regulations