Anticoagulants · Pharmacology

Which of the following describes the mechanism of Rivaroxaban and Apixaban?

  1. Indirect thrombin blockers
  2. Direct Factor Xa inhibitors
  3. Glycoprotein IIb/IIIa antagonists
  4. Phosphodiesterase inhibitors
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Correct answer: Direct Factor Xa inhibitors

Rivaroxaban and Apixaban are Direct Oral Anticoagulants (DOACs) that bind directly to the active site of Factor Xa. By inhibiting Factor Xa, they prevent the 'thrombin burst' that occurs in the coagulation cascade.

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