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- W4283795500 abstract "<h3>Objective</h3> Oxcarbazepine (OXC) is metabolised to active 10-monohydroxy derivative (MHD) after oral administration. Using this fact we aimed to develop an MHD population pharmacokinetic (PPK) model in Chinese adult epileptic patients to facilitate the clinical implementation of model-guided individualised drug therapy. <h3>Methods</h3> We collected blood samples from Chinese adult epileptic patients taking OXC at the Second Affiliated Hospital of Zhejiang University School of Medicine. We used high performance liquid chromatography (HPLC-MS/MS) with tandem mass spectrometry to detect MHD concentrations in the blood samples. We collected various data from patients including their demographic, pathological, and physiological information. MassARRAY method was used to detect <i>ABCC2</i>, <i>ABCB1</i>, <i>SCN8A</i>, <i>SCN1A</i>, <i>SCN2A</i>, <i>SCN3A</i>, <i>UGT1A9</i>, and <i>UGT2B7</i> gene polymorphisms. We used a nonlinear mixed-effects modelling method to develop the PPK model and we predicted dosing regimens through simulation. <h3>Result</h3> In total we collected 164 blood samples from 118 patients. We found that a one-compartment model with first-order absorption better described the in vivo MHD pharmacokinetics. <i>UGT2B7</i> gene (rs7439366) site mutation and the combined use of valproic acid enhanced the MHD clearance rate. We divided patients into groups based on the <i>UGT2B7</i> genotype and whether they were also using valproic acid at the same time. Individualised OXC dosing regimens were proposed for different subgroups of patients. <h3>Conclusion</h3> In Chinese adult epileptic patients, individualised drug administration can be facilitated using a PPK model of OXC. <h3>Trial registration number</h3> ChiCTR-OOC-17012141." @default.
- W4283795500 created "2022-07-05" @default.
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- W4283795500 date "2022-07-04" @default.
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- W4283795500 title "Population pharmacokinetics of oxcarbazepine 10-monohydroxy derivative in Chinese adult epileptic patients" @default.
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- W4283795500 doi "https://doi.org/10.1136/ejhpharm-2022-003357" @default.
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