Clopidogrel is a prescription drug used to reduce the risk of heart attack and stroke. Learn about the common, mild, and serious side effects it can cause and how to manage them.

plus extended-release dipyridamole (200 mg) given twice daily, or clopidogrel (75 mg) given once daily. The study was sponsored by the maker of the aspirin/dipyridamole combination (Aggrenox).