Title : Clinical pharmacokinetics of fexofenadine enantiomers.

Pub. Date : 2010 Jan

PMID : 19947891






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1 This article reviews the pharmacokinetic differences between fexofenadine enantiomers in humans and summarizes the previous reports that co-administration of P-glycoprotein inhibitors has altered the stereoselective pharmacokinetics of fexofenadine enantiomers. fexofenadine ATP binding cassette subfamily B member 1 Homo sapiens
2 This article reviews the pharmacokinetic differences between fexofenadine enantiomers in humans and summarizes the previous reports that co-administration of P-glycoprotein inhibitors has altered the stereoselective pharmacokinetics of fexofenadine enantiomers. fexofenadine ATP binding cassette subfamily B member 1 Homo sapiens
3 Co-administration of itraconazole and/or verapamil significantly increased the AUC(0 - 24) of both enantiomers; their influence on the P-glycoprotein-mediated transport of (S)-fexofenadine was greater than that of the (R)-enantiomer. fexofenadine ATP binding cassette subfamily B member 1 Homo sapiens
4 However, because t(max) and t(1/2) were constant in both studies, the fexofenadine stereoselective pharmacokinetics appears to be due to P-glycoprotein efflux activity in the small intestine, which suggests that P-glycoprotein probably possesses the chiral discriminatory abilities. fexofenadine ATP binding cassette subfamily B member 1 Homo sapiens
5 However, because t(max) and t(1/2) were constant in both studies, the fexofenadine stereoselective pharmacokinetics appears to be due to P-glycoprotein efflux activity in the small intestine, which suggests that P-glycoprotein probably possesses the chiral discriminatory abilities. fexofenadine ATP binding cassette subfamily B member 1 Homo sapiens