Abstract
A simple, rapid, specific and sensitive method has been developed and validated for simultaneous determination of lopinavir and ritonavir in human plasma. The analytical procedure involves a protein precipitation method using fluoxetine as internal standard Separation was carried out on an Inertsil ODS column using a mobile phase consisting of acetonitrile and 5 mM ammonium acetate buffer. The total run time of analysis was 2.0 min. A linear response function was established for the range of concentrations 50.67–10,008.82 ng mL−1 for lopinavir and 5.066–1,000.693 ng mL−1 for ritonavir. The method was successfully applied to an oral bioequivalence study in humans.
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