system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Fondaparinux is an anticoagulant that acts by inhibiting
assistant
The correct answer is  Fondaparinux is a synthetic congener of Heparin containing only active pentasaccharide unit and inhibits only Xa. It doesn't inhibit thrombin (factor II a).