Neurologist

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Drug Information Update- Updated Safety Information about a drug interaction between Clopidogrel Bisulfate (Plavix) and Omeprazole (Prilosec, Prilosec OTC)

The Division of Drug Information (DDI) is CDER’s focal point for public inquiries. We serve the public by providing information on human drug products and drug product regulation byFDA.


The U.S. Food and Drug Administration (FDA) has new data showing that omeprazole (Prilosec/Prilosec OTC)—a medicine used to reduce stomach acid—reduces the anti-blood clotting effect of clopidogrel (Plavix) by almost half when these two medicines are taken by the same patient. Patients at risk for heart attacks or strokes who use clopidogrel to prevent blood clots will not get the full effect of this medicine if they are also taking omeprazole. This effect is called a drug interaction and it occurs because omeprazole blocks the conversion of clopidogrel into its active form.

Since clopidogrel can cause bleeding in the stomach, medications like omeprazole may be used in combination to reduce the production of stomach acid, and prevent stomach bleeding. Omeprazole is available by prescription and as an over-the-counter (OTC) medication to treat frequent heartburn.

For more information, please visit: Clopidogrel/Omeprazole

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December 5, 2009 - Posted by | 1

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