Some common anticoagulant drugs include warfarin, enoxaparin and heparin, explains National Jewish Health. The U.S. Food and Drug Administration approves other anticoagulants, including dabigitran, rivaroxaban and apixaban, states the American Heart Association.
Also known as blood thinners, anticoagulants help to prevent the formation of blood clots by affecting coagulation factors, notes the American Heart Association. Anticoagulant drugs, such as heparin and warfarin, slow the formation of clots by competing with vitamin K. Doctors usually recommend them for patients with atrial fibrillation and those with a high risk of stroke. Serious side effects for anticoagulants include skin rash, bruising and bleeding in the stomach, intestines and brain.