What is clopidogrel?

Clopidogrel, or Plavix, is an antiplatelet medication that works by preventing platelets from clumping together and forming clots that may cause a heart attack or stroke, states MedlinePlus. Doctors usually prescribe clopidogrel for patients who have undergone coronary angioplasty or stent insertion or who have experienced heart attack or stroke.

Doctors sometimes prescribe clopidogrel for patients with peripheral arterial disease and those who have had coronary artery bypass grafting surgery, according to MedlinePlus. It is important for patients to take clopidogrel every day, even if they feel well. Stopping clopidogrel can increase the risk of heart attack or stroke. In patients with coronary stents, stopping clopidogrel increases the risk of a blood clot forming inside the stent.