Pentazocine (Talwin) is scheduled as which DEA schedule?

• A. Schedule II
• B. Schedule IV
• C. Schedule III
• D. Schedule V

Answer: (B)

Understanding how the DEA schedules drugs helps you see why pentazocine fits in Schedule IV. Scheduling weighs abuse potential, accepted medical use, and safety. Pentazocine is an opioid analgesic with mixed agonist-antagonist action, giving it legitimate pain-relieving effects while generally presenting lower abuse and dependence risk than stronger mu-opioid agonists. It has medical use and an acceptable safety profile relative to drugs in higher schedules, so it’s placed in Schedule IV.

The presence of naloxone in some formulations (to deter certain routes of misuse) doesn’t shift its schedule—the scheduling reflects overall abuse potential and medical usefulness rather than a single formulation feature. For comparison, drugs with high abuse potential and significant dependence risk (without accepted medical use) fall into Schedule II, while drugs with somewhat lower risk but still substantial potential (and accepted medical use) would be Schedule III. Schedule V represents the lowest potential with limited dependence and a restricted medical use. Therefore, pentazocine with its relative safety and medical utility is categorized as Schedule IV.