Pharmacology · single question

What is the MOA of apixaban?

  1. Vitamin K antagonism
  2. Direct factor Xa inhibition
  3. Direct thrombin (factor IIa) inhibition
  4. Antiplatelet ADP (P2Y12) receptor blockade
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Correct answer: B. Direct factor Xa inhibition

Apixaban is a direct oral anticoagulant (DOAC) that directly and reversibly inhibits factor Xa, blocking the conversion of prothrombin to thrombin, without requiring vitamin K antagonism or routine INR monitoring.

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