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- W2053403718 abstract "What is known and objective This study aimed to elucidate the pharmacokinetics of erlotinib in Japanese patients with advanced non-small cell lung cancer (NSCLC) and to investigate the relationship between erlotinib exposure and the occurrence of interstitial lung disease (ILD)-like events. Methods Population pharmacokinetics analysis was performed using nonlinear mixed-effects modelling software (NONMEM) based on 348 plasma samples from 97 patients obtained in two phase II clinical studies. Individual empirical Bayesian estimates (EBEs) of apparent oral clearance (CL/F) and Cmax were compared between the patients who developed and did not develop ILD-like events. Results A 1-compartment model with first-order absorption and first-order elimination was used to describe the plasma concentrations of erlotinib. The estimated population pharmacokinetics parameters were as follows: 4·71 L/h for CL/F, 163 L for apparent volume of distribution (Vc/F) and 1·97 h−1 for absorption rate constant (Ka). Total bilirubin (TBIL) and alpha 1-acid glycoprotein (AGP) were identified as statistically significant covariates for CL/F. No differences in CL/F and Cmax were observed between the patients with ILD-like events and those without ILD-like events. What is new and conclusions A population pharmacokinetics model of erlotinib was developed and validated in Japanese patients. There was no relationship between exposure of erlotinib before the occurrence of ILD-like events and the occurrence of ILD-like events when erlotinib was administered at the same dosage. The high plasma concentration of erlotinib reported in patients after the onset of ILD-like events may be explained by CL/F decrease which occurs along with increasing levels of AGP which was identified as a covariate for CL/F." @default.
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- W2053403718 date "2014-11-17" @default.
- W2053403718 modified "2023-10-01" @default.
- W2053403718 title "Population pharmacokinetics of erlotinib in Japanese patients with advanced non-small cell lung cancer" @default.
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- W2053403718 doi "https://doi.org/10.1111/jcpt.12232" @default.
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