Allergy to class/drug
33% of patients develop some form of bleeding complication; 2-6% develop major bleeding
HIT<unk> -Induced Thrombocytopenia)
Recent surgery or trauma
Renal failure
Alcoholism
Malignancy
Liver failure
Concurrent use of warfarin, fibrinolytics, steroids, or antiplatelet drugs
Unfractionated heparin
Enoxaparin
Argatroban
Ticlopidine
Apixaban
Bivalirudin
Dalteparin
Low molecular weight heparin