Which of the following is NOT a Schedule II substance?

• A. Phencyclidine (PCP)
• B. Opium Poppy Straw
• C. Nalorphine
• D. 1-phenylcyclohexylamine precursors to PCP

Answer: (C)

Understanding how substances are placed in schedules hinges on abuse potential and medical use. Schedule II drugs have a high potential for abuse but still have accepted medical uses, with strict prescribing rules. Phencyclidine (PCP) is a classic example placed in Schedule II because of its significant abuse risk, despite its historical medical use. Opium poppy straw is also Schedule II since it’s a raw material for opiates used medically and is tightly controlled. Precursors to PCP are not themselves placed in Schedule II; they’re regulated as List I chemicals to prevent production of PCP, rather than being scheduled as Schedule II drugs. Nalorphine does not appear on the Schedule II list, so it is not a Schedule II substance.