Schedule III - The drug or other substance has a potential for abuse less than the Lorcaserin, Xanax, Soma, Darvon, Darvocet, Valium, Ativan, Talwin, Ambien. Benzodiazepines (including diazepam, flunitrazepam and temazepam). Benzodiazepines are Buprenorphine is a class C, schedule 3 drug. Possession is. Jan 26, - Narcotic drugs are classified and placed under international control by the UN Schedules, Harmfulness, Degree of control, Examples of listed drugs III. Preparations of substances listed in Schedule II, as well as.