aspirin daily heparin prophylactic anticoagulation molecular weight mg asa low 
heparin fondaparinux lmwh warfarin molecular weight derived coumarin low prophylaxis 
warfarin low heparin thrombin lmwh inhibitors xa dose therapeutic molecular 
heparin low molecular weight warfarin anticoagulation therapeutic aspirin dose anticoagulants 
warfarin anticoagulation inr pt receiving patients therapeutic prophylactic dose therapy 
bleeding dose heparin molecular weight inr stable carries warfarin low 
heparin low flush acetylsalicylic dwelling dose anticoagulation acid needed maintenance 
anticoagulation therapeutic receiving patients therapy anticoagulant aspirin require anticoagulants stable