Which of the following drugs is listed as Schedule IV in the material?

• A. Alprazolam
• B. Diazepam
• C. Clonazepam
• D. Lorazepam

Answer: (C)

Benzodiazepines are placed in Schedule IV because they have accepted medical use but carry a potential for abuse that is lower than drugs in the higher schedules. Clonazepam, a benzodiazepine with anxiolytic and anticonvulsant effects, is listed in Schedule IV in the material, so it is treated as a controlled substance with prescription requirements and the standard Schedule IV dispensing rules (valid prescription, up to five refills in six months, appropriate record-keeping). This reflects the balance of therapeutic use and abuse risk characteristic of Schedule IV drugs.