Clotting time is most like to be prolonged by the administration of____________?
Correct answer: D. Acetyl salicylic acid
- A. Vitamin K
- B. Barbiturates
- C. Acetominophen
- D. Acetyl salicylic acid
Explanation
Aspirin irreversibly inhibits platelet cyclooxygenase, reducing thromboxane A2 and prolonging bleeding or clotting-related tests. Vitamin K and barbiturates do not produce this antiplatelet effect, while acetaminophen has little effect on platelet function at usual doses.
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