CYP2C19 testing to benefit women with breast cancer- predicting those who arelikely to have the best outcomes with tamoxifen

Dr Oesterheld’s Comment: It has been well established that women with breast cancer who may receive tamoxifen should receive genetic CYP2D6 testing. They may be in a group of individuals who will not receive benefit from tamoxifen because they are slow metabolizers and will not convert the pro-drug tamoxifen to the active metabolite endoxifen which [...]

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