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Article Abstract
Osimertinib is a new-generation epidermal growth factor inhibitor for the treatment of non-small cell lung cancer. In the present study, a rapid and sensitive LC with tandem MS method was developed and validated for the determination of osimertinib in rat plasma. Chromatographic separation was carried out on a C18 column using acetonitrile and water containing 0.1% formic acid. The assay was validated over a concentration range of 1.0-1000 ng/mL for osimertinib, with a lower LOQ of 1.0 ng/mL. The intra- and interday accuracy values for osimertinib ranged from 92.66 to 101.50% and from 97.08 to 99.15%, respectively, and the intra- and interday precision values for osimertinib ranged from 6.25 to 10.34% and from 3.43 to 10.44%, respectively. The method was successfully applied in a pharmacokinetic study of osimertinib after oral administration of osimertinib (4.5 mg/kg) to rats.
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