Pharmacokinetics of Nelfinavir and Efavirenz in Antiretroviral-Naïve, Human Immunodeficiency Virus-Infected Subjects when Administered Alone or in Combination with Nucleoside Analog Reverse Transcriptase Inhibitors

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Abstract
Pharmacokinetic studies were conducted with human immunodeficiency virus-infected patients receiving efavirenz, nelfinavir, or both agents at weeks 4 and 32. Reductions of 25% and 45% were observed in the mean nelfinavir area under the concentration-time curve and minimum concentration of the drug in serum, and there was a 31% more rapid half-life for patients receiving both drugs compared to patients receiving nelfinavir alone. There were no significant differences in efavirenz pharmacokinetics.