Which drug class inhibits platelet aggregation?

• A. Lipid-Lowering Agent
• B. Platelet Inhibitor
• C. Immunosuppressant
• D. Ophthalmic Anti-Infective

Answer: (B)

Platelet aggregation is the process by which platelets clump together to form a clot, and drugs that prevent this clumping are called platelet inhibitors. These agents interfere with platelet activation or the receptors that drive aggregation, reducing clot formation in conditions where arterial thrombosis is a risk. For example, aspirin reduces thromboxane A2 by inhibiting COX-1, clopidogrel blocks the P2Y12 receptor, and GP IIb/IIIa inhibitors prevent platelets from cross-linking. In contrast, lipid-lowering agents target cholesterol, immunosuppressants dampen immune responses, and ophthalmic anti-infectives treat eye infections. So the class that inhibits platelet aggregation is platelet inhibitors.