Rivaroxaban Factor Xa Inhibitor — FRCA Primary MCQ
Instant feedback + full explanation. One question, done properly.
Educational content. Not a substitute for clinical judgement or local policy.
Reveal the answer and explanation
Correct answer: E — Inhibiting factor Xa directly
Rivaroxaban is a direct oral factor Xa inhibitor. It binds directly to Xa (not requiring AT III as a cofactor unlike heparin). Other direct Xa inhibitors include apixaban and edoxaban. Dabigatran is a direct thrombin (IIa) inhibitor. These DOACs have more predictable pharmacokinetics than warfarin and do not require routine monitoring.
Reference: Peck Hill Williams 2014 Pharmacology for Anaesthesia and Intensive Care