Harvard Heart Letter

Ask the doctor: Adding Plavix to Coumadin

Warfarin (Coumadin) belongs to the class of drugs called anticoagulants, which slow blood clotting. Clopidogrel (Plavix) belongs to another class of drugs called antiplatelet agents, which slow blood clotting in a different way. Sometimes both types of drug are needed to prevent stroke, a benefit that outweighs the added bleeding risk from this dual therapy.
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