Which of the following is the mechanism of action of aspirin

Which of the following is the mechanism of action of aspirin

Which of the following is the mechanism of action of aspirin?

A. Inhibition of angiotensin-converting enzyme (ACE)

B. Inhibition of cyclooxygenase (COX) enzymes

C. Blockade of beta-adrenergic receptors

D. Inhibition of HMG-CoA reductase

E. Blockade of calcium channels

Answer: B

Explanation: Aspirin is a nonsteroidal anti-inflammatory drug (NSAID) that irreversibly inhibits cyclooxygenase (COX-1 and COX-2) enzymes, reducing the production of prostaglandins and thromboxane A2—resulting in anti-inflammatory, analgesic, antipyretic, and antiplatelet effects.