Which of the following is an anti-inflammatory?

• A. Diphenhydramine
• B. Miconzol 1%
• C. Mirtazapine
• D. Rimadyl/Novox (carprofen)

Answer: (D)

Anti-inflammatory drugs work by dampening the body's inflammatory response, typically by blocking prostaglandin production through COX enzymes. The drug Rimadyl/Novox, which contains carprofen, is an NSAID specifically used to reduce inflammation and pain in dogs. It lowers prostaglandin levels, the mediators that drive inflammation, swelling, and discomfort.

The other medications listed do not act as anti-inflammatories in the same sense: diphenhydramine is an antihistamine used for allergies or sedation, miconazole is an antifungal, and mirtazapine is an antidepressant often used as an appetite stimulant.