Enantiospecific pharmacokinetics of metoprolol in CYP2D6 ultra-rapid metabolizers and correlation with exercise-induced heart rate.

Abstract excerpt

OBJECTIVE: Our objective was to study the enantioselective pharmacokinetics of metoprolol in CYP2D6 ultra-rapid metabolizers (UM) compared with extensive (EM) and poor (PM) metabolizers to quantify differential effects of metoprolol enantiomers on the beta1-adrenoreceptor blockade. METHODS: Twenty-nine healthy individuals were selected based on their CYP2D6 genotype, and 100 mg racemic metoprolol was...

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