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Volume 348:2041-2043 May 15, 2003 Number 20
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Pharmacogenetics

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To the Editor: The review by Weinshilboum on the inheritance of drug response (Feb. 6 issue)1 focuses on the pharmacogenetics of drug metabolism as an important factor in the variability of drug effects among persons. An aspect of this topic that is not often addressed is the variability among patients (representing the majority) who carry wild-type alleles responsible for metabolizing enzymes. Responses to two drugs exemplify this variability. According to a recent study,2 metabolic clearance of warfarin in patients who are homozygous for the wild-type CYP2C9 allele ranges from about 130 ml per minute to 1500 ml per minute. The . . . [Full Text of this Article]


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