Buprenorphine is classified as which schedule of opioid used in veterinary medicine?

• A. Schedule II
• B. Schedule III
• C. Schedule IV
• D. Not scheduled

Answer: (B)

Schedule classification reflects abuse potential, medical use, and safety. Buprenorphine is a partial μ-opioid agonist, providing analgesia with a ceiling effect on respiratory depression and euphoria. This lowers its abuse potential compared with full opioid agonists, so it is placed in a middle category of controlled substances. In veterinary medicine, this corresponds to Schedule III, indicating legitimate medical use with moderate risk of misuse. It is not not scheduled, and it is more tightly regulated than Schedule IV, reflecting its intermediate risk profile.