Which medication is a transdermal formulation used to treat pain?

• A. Butrans transderm
• B. Percocet oral
• C. OxyContin oral
• D. Vicodin oral

Answer: (A)

Transdermal delivery systems provide analgesia by releasing medication through the skin over an extended period, giving steady pain relief without the peaks and troughs of many oral doses. Butrans is a transdermal patch that delivers buprenorphine, an opioid formulated for long-acting pain control, typically worn for several days to maintain consistent levels. The other options are swallowed pills that contain oxycodone or hydrocodone with acetaminophen, which are not transdermal and have different dosing, onset, and side‑effect profiles.