Pharmacology and the Nursing Process by Linda Lane Lilley: Practice Exam 2026 - Free Pharmacology Practice Questions and Study Guide

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What is aspirin's primary mechanism of action as an antiplatelet drug?

Increasing platelet aggregation

Irreversible inhibition of cyclooxygenase

Aspirin's primary mechanism of action as an antiplatelet drug is irreversible inhibition of cyclooxygenase, also known as COX. This means that aspirin prevents the formation of a substance called thromboxane A2, which is responsible for increasing platelet aggregation, or clumping together. Stimulating collagen production and direct activation of clotting factors are not related to aspirin's primary mechanism of action as an antiplatelet drug, making options C and D incorrect.

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Stimulating collagen production

Direct activation of clotting factors

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