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Which property of aspirin is responsible for its use in preventing heart attacks?

1. Antipyretic (fever reducing)
2. Analgesic (pain relieving)
3. It is used to thin the blood
4. It inhibits the synthesis of prostaglandins

Correct answer: It inhibits the synthesis of prostaglandins

Solution

Aspirin prevents heart attacks by inhibiting prostaglandin synthesis via irreversible inhibition of cyclooxygenase (COX) enzyme. This reduces thromboxane A2 production in platelets, decreasing platelet aggregation and blood clot formation.

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