Which drug is Methadone?

• A. Meperidine
• B. Nabilone
• C. Methadone
• D. Secobarbital

Answer: (C)

Methadone is a long-acting synthetic opioid agonist that binds to μ-opioid receptors to reduce withdrawal symptoms and cravings in opioid dependence, enabling once-daily dosing in maintenance therapy. Its distinctive feature is its duration and use in treating opioid use disorder. The other drugs belong to different classes: meperidine is a short-acting opioid analgesic, nabilone is a synthetic cannabinoid, and secobarbital is a barbiturate. So methadone is the one that matches this name and its well-known clinical role.