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Effect of rifampicin pretreatment on the oral bioavailability of domperidone in healthy human volunteers

  • Adukondalu Devandla , Shravan Kumar Yamsani and Madhusudan Rao Yamsani EMAIL logo
Published/Copyright: September 3, 2015

Abstract

Background: Increased exsorption of domperidone was observed from different parts of the small intestine of the rat after pretreatment with rifampicin by the everted sac method. Based on the in vitro studies the effect of rifampicin pretreatment on the pharmacokinetics of domperidone was investigated in eight healthy male volunteers.

Methods: After an overnight fast, 20 mg domperidone was administered to the volunteers, either alone or after 6 days pretreatment with a once daily dose of 600 mg rifampicin. Serum concentrations of domperidone were estimated by reverse phase HPLC. Pharmacokinetic parameters were determined based on non-compartmental model analysis using the computer program kinetica.

Results: Rifampicin pretreatment decreased Cmax, AUCo-∞, AUMC, MRT and t1/2 by 25.11%, 37.76%, 64.97%, 43.71% and 44.48%, respectively. This may be due to increased induction of cytochrome P450 enzymes and/or increased expression of P-glycoprotein.

Conclusions: This interaction may have clinical significance when domperidone is co-administered with rifampicin in chronic treatment conditions, such as tuberculosis, leprosy and other infections of joints, bones, etc.


Corresponding author: Prof. Madhusudan Rao Yamsani, Vaagdevi College of Pharmacy, Ramnagar, Hanamkonda, Warangal – 506 009, Telangana, India, E-mail: ; and University College of Pharmaceutical Sciences, Kakatiya University, Warangal, Telangana, India

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Received: 2015-1-31
Accepted: 2015-7-22
Published Online: 2015-9-3
Published in Print: 2015-12-1

©2015 by De Gruyter

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