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

• A. Diclofenac
• B. Carisoprodol
• C. Naproxen
• D. Acetaminophen

Answer: (B)

Carisoprodol is listed as Schedule IV because it has accepted medical use but a relatively lower potential for abuse compared with Schedule III drugs, though dependence can occur. It’s also a prodrug of meprobamate, a substance with its own Schedule IV status, which contributes to its controlled classification. The other drugs are not scheduled: diclofenac and naproxen are NSAIDs without abuse potential recognized by the Controlled Substances Act, and acetaminophen is an over-the-counter analgesic not placed in the schedules.