What are four schedule II drugs used in veterinary medicine?

• A. Hydromorphone, Fentanyl, Morphine, Codeine
• B. Hydromorphone, Tramadol, Buprenorphine, Butorphanol
• C. Fentanyl, Tramadol, Morphine, Buprenorphine
• D. Butorphanol, Buprenorphine, Tramadol, Codeine

Answer: (A)

Schedule II drugs have a high potential for abuse but are still accepted for medical use; in veterinary practice, many potent opioids fall into this category and require strict handling, record-keeping, and prescription controls. The four substances listed in the correct set are hydromorphone, fentanyl, morphine, and codeine. Hydromorphone, morphine, and fentanyl are classic, widely used opioids for pain management and anesthesia in animals, and codeine is classified as Schedule II when used alone, fitting the same regulatory category.

The other options mix drugs from different schedules. Tramadol and butorphanol are not Schedule II in most jurisdictions (tramadol is typically Schedule IV and butorphanol Schedule IV), and buprenorphine is Schedule III. Because the question asks for four Schedule II drugs, the set that contains only Schedule II drugs is the correct one.