<prompt> All the following drugs are used for thrombo prophylaxis except -HeparinWarfarinAspirinAntithrombin  <response>: Ans. is d i.e., Antithrombin Prophylaxis for venous thrombus o Heparin unfractioned, LM W, or fondaparinox and oral anticoagulants warfarin. Prophylaxis for aerial thrombus o Aspirin o Clopidogrel o Ticlopidine 