Pharmacology · single question
What is the mechanism of action of apixaban?
Show answer and explanation
Correct answer: A. Direct factor Xa inhibition
- A. Correct. Apixaban (and rivaroxaban, edoxaban) directly inhibit factor Xa. Unlike warfarin, there is no INR to monitor — bleeding risk is managed by timing rather than laboratory titration.
- B. That is dabigatran, the direct thrombin inhibitor.
- C. That is warfarin, which inhibits vitamin K epoxide reductase.
- D. That is heparin, which potentiates antithrombin III.