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Clin Pharmacol Ther. 2010 May;87(5):553-7. doi: 10.1038/clpt.2010.3. Epub 2010 Mar 24.

Genetic variation in nicotine metabolism predicts the efficacy of extended-duration transdermal nicotine therapy.

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  • 1Department of Psychiatry, University of Pennsylvania, Philadelphia, Pennsylvania, USA.


In a placebo-controlled trial, we examined the efficacy of a 6-month ("extended") transdermal nicotine therapy vs. the 8-week ("standard") therapy in 471 Caucasian smokers with either normal or reduced rates of nicotine metabolism as determined at pretreatment. Extended therapy was superior to standard therapy in genotypic or phenotypic reduced metabolizers (RMs) of nicotine but not in normal metabolizers (NMs). RMs of nicotine are candidates for extended transdermal nicotine therapy, whereas an alternative therapeutic approach may be needed for those with normal rates of nicotine metabolism.

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