Which medication is commonly used as an antiplatelet therapy for myocardial infarction?

• A. Atenolol oral
• B. Warfarin oral
• C. Crestor oral
• D. Plavix oral

Answer: (D)

In myocardial infarction, preventing further clotting is crucial, and antiplatelet therapy is a cornerstone of treatment. Plavix (clopidogrel) is a commonly used antiplatelet that helps stop platelets from sticking together and forming new clots. It works by irreversibly blocking the P2Y12 receptor on platelets, which prevents ADP from activating the platelets and promoting aggregation. This is often used as part of dual antiplatelet therapy with aspirin to reduce the risk of recurrent heart attack, stroke, or death, especially after MI or PCI.

The other medications listed do not act as antiplatelets. Atenolol is a beta-blocker that reduces heart workload; warfarin is an anticoagulant that interferes with blood clotting factors; Crestor is a statin that lowers cholesterol. Plavix is the antiplatelet option.