Which of the following substances is listed as Schedule III in the provided material?

• A. Dronabinol
• B. Phendimetrazine
• C. Gamma Hydroxybutyrate
• D. Amobarbital

Answer: (C)

Schedule III substances have an accepted medical use and a potential for abuse that is lower than the drugs in the higher schedules. Gamma-hydroxybutyrate is listed as Schedule III in the material because its medically used form, sodium oxybate, is approved for treating narcolepsy, so it has a recognized medical use. At the same time, the abuse potential is acknowledged, but it’s considered manageable under strict controls and does not carry the same level of risk as Schedule I or II substances. This combination of medical utility and lower, though present, abuse potential is what places it in Schedule III.