Allergy to class/drug
Active major bleeding
Bacterial endocarditis
Thrombocytopenia associated with antiplatelet antibody when tested with<unk> 
Weight <50kg
Severe renal impairment (CrCl <30)
Fondaparinux
Enoxaparin
Apixaban
Argatroban
Bivalirudin
Unfractionated heparin
Rivaroxaban
Reteplase