This is the list of Schedule IV drugs as defined by the United States Controlled Substances Act. , Clonazepam. , Clorazepate , Lorazepam. Drugs, substances, and certain chemicals used to make drugs are classified into the drug; for example, Schedule I drugs have a high potential for abuse and the Xanax, Soma, Darvon, Darvocet, Valium, Ativan, Talwin, Ambien, Tramadol. Aug 2, - The FDA started listing drugs by classification, or drug schedules, in Examples of Schedule IV substances include: alprazolam (Xanax).