The Controlled Substances Act of 1970 placed various drugs and substances into five schedules: I, II, II, IV, and V. Schedules, which are updated annually, are arranged in descending order, according to drugs and substances with the highest abuse potential to the least.
The classification for drugs and substances in Schedule V stipulates that these are drugs, substances or chemicals with lower abuse potential than Schedule IV and consist of preparations with limited quantities of certain narcotics. These are drugs that are generally used for analgesic, antidiarrheal, and antitussive reasons.
Examples of Schedule V drugs include codeine preparations – 200 mg/(100 ml or 100gm) (Cosanyl, Robitussin A-C, Cheracol, Cerose, Pediacof), dihydrocodone preparation – 100 mg/(100 ml or 100 gm) Cophene-S, diphenoxylate preparations 2.5 mg/25 ug AtSO4 (Lomotil), pregabalin (Lyrica), lacosamide (Vimpat), opium preparations – 100 mg/(100 ml or 100 gm) (Parapectolin, Kapectolin PG, Kaolin Pectin P.G., and pyrovalerone (Centroton, Thymergix).
The most complete list of Schedule V drugs/substances can be found on the U.S. Department of Justice, Drug Enforcement Agency website. Note that the drug or substance name appears first, with other names, if any, in parentheses, and brand names appearing on the far right side.