Abstract

To the Editor: We read with interest the article by Simon et al1 regarding their recent study, from which we understand that the coadministration of proton pump inhibitors (PPIs) and clopidogrel after percutaneous coronary intervention is safe. The P450 enzyme system is responsible for the metabolism of clopidogrel.2,3 Hepatic cytochrome P450 (CYP) isoenzymes convert clopidogrel to its active metabolites through 2-step oxidation pathways.2, 4 The second pathway induces the formation of the active metabolite of clopidogrel.2, 3 The most important isoforms of human cytochrome P450 responsible of the transformation of …

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