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Are Antiplatelet Effects of Clopidogrel Inhibited by Atorvastatin?

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Are Antiplatelet Effects of Clopidogrel Inhibited by Atorvastatin?

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With respect to antiplatelet therapy, randomized trials and their meta-analyses1 indicate benefits of clopidogrel either as an alternative2 or an adjunct3 to aspirin in some high-risk patients. Regarding the metabolic pathways of clopidogrel, the active thiol metabolite binds rapidly and irreversibly to platelet adenosine diphosphate (ADP) receptors, thus inhibiting platelet aggregation.4 Clopidogrel, a thienopyridine, is a platelet ADP-receptor blocker that is known to be beneficial during and after coronary stenting.2 5 Clopidogrel is extensively metabolized by the liver. The main circulating metabolite is the carboxylic acid derivative, which has no effect on platelet aggregation. The active metabolite, a thiol derivative, is formed by oxidation of clopidogrel to 2-oxo-clopidogrel and subsequent hydrolysis. Results of in vitro studies in human liver microsomes and recombinant cytochromes P450 have shown that several cytochromes are involved in the oxidative metabolism of clopidogrel

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