<unk> (oral) is an anticoagulant that is FDA approved for the treatment of venous thromboembolism, pulmonary embolism, thromboembolic complications associated with atrial fibrillation, cardiac valve replacement, and/or myocardial infarction. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include hemorrhage, necrosis of skin and other tissues, systemic atheroemboli, and cholesterol microemboli.
Warfarin 
Oxeladin
Clopidogrel
Ticlopidine
Apixaban
Enoxaparin
Ticagrelor
Heparin