Which drug inhibits platelet aggregation?

Study for the MCC Block 2 Test. Enhance your skills with interactive quizzes featuring hints and explanations. Prepare effectively and excel in your exam!

Multiple Choice

Which drug inhibits platelet aggregation?

Explanation:
Understanding how drugs affect platelet function is being tested here. Platelets clump together to form a clot, and thromboxane A2 promotes this aggregation. Aspirin irreversibly inhibits the enzyme COX-1 in platelets, blocking thromboxane A2 production and preventing platelets from aggregating. Because platelets cannot make new COX-1, this effect lasts for the platelets’ lifespan (roughly 7–10 days) until new platelets are produced. The other drugs listed do not reduce platelet aggregation: ceftriaxone is an antibiotic, Procrit stimulates red blood cell production, and morphine is an opioid analgesic.

Understanding how drugs affect platelet function is being tested here. Platelets clump together to form a clot, and thromboxane A2 promotes this aggregation. Aspirin irreversibly inhibits the enzyme COX-1 in platelets, blocking thromboxane A2 production and preventing platelets from aggregating. Because platelets cannot make new COX-1, this effect lasts for the platelets’ lifespan (roughly 7–10 days) until new platelets are produced. The other drugs listed do not reduce platelet aggregation: ceftriaxone is an antibiotic, Procrit stimulates red blood cell production, and morphine is an opioid analgesic.

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