Abstract
Abstract The influence of efavirenz, etravirine, raltegravir, and nevirapine administration on the pharmacokinetics of ritonavir-boosted darunavir was investigated using population pharmacokinetics analysis. The population was composed of 142 patients infected with HIV: darunavir plus nucleoside/nucleotide reverse transcriptase inhibitors (NRTI), 54 patients (group A); darunavir plus efavirenz±NRTI, 4 patients (group B); darunavir plus etravirine±NRTI, 5 patients (group C); darunavir plus nevirapine±NRTI, 21 patients (group D); darunavir plus raltegravir±NRTI, 38 patients (group E); and darunavir plus raltegravir and etravirine±NRTI, 20 patients (group F). A significant increase in darunavir clearance in combination with nevirapine (+66%) and efavirenz (+235%) was observed. A significant decrease (p<0.05) in trough plasma concentration was observed in groups B and D compared with the other groups. Our study indicates that the combination of ritonavir-boosted darunavir and etravirine or raltegravir has no significant influence on the pharmacokinetics of darunavir in contrast to the combination of ritonavir-boosted darunavir and nevirapine or efavirenz, which involves an increase in darunavir clearance and a decrease in the plasma concentration of darunavir.
Published Version
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