Body mass index as a determinant of clozapine plasma concentrations: a pharmacokinetic-based hypothesis
Background:Knowledge regarding the impact of body composition measures on pharmacokinetics of antipsychotics is limited.Aims:Our aim was to investigate the impact of body weight and body mass index on clozapine pharmacokinetics using a therapeutic drug monitoring database.Methods:A large therapeutic...
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| Main Authors: | , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
February 5, 2021
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| In: |
Journal of psychopharmacology
Year: 2021, Volume: 35, Issue: 3, Pages: 273-278 |
| ISSN: | 1461-7285 |
| DOI: | 10.1177/0269881120985166 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1177/0269881120985166
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| Author Notes: | Maxim Kuzin, Ekkehard Haen, Christoph Hiemke, Benjamin Bochon, Karolina Bochon, Gerhard Gründer, Michael Paulzen and Georgios Schoretsanitis |
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| 245 | 1 | 0 | |a Body mass index as a determinant of clozapine plasma concentrations |b a pharmacokinetic-based hypothesis |c Maxim Kuzin, Ekkehard Haen, Christoph Hiemke, Benjamin Bochon, Karolina Bochon, Gerhard Gründer, Michael Paulzen and Georgios Schoretsanitis |
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| 520 | |a Background:Knowledge regarding the impact of body composition measures on pharmacokinetics of antipsychotics is limited.Aims:Our aim was to investigate the impact of body weight and body mass index on clozapine pharmacokinetics using a therapeutic drug monitoring database.Methods:A large therapeutic drug monitoring dataset of clozapine plasma concentrations considering three patient subgroups was analysed: a control group (CLZ0, 20?30 kg/m2, n=266), a group with high body mass index (CLZhigh, body mass index ?30?kg/m2, n=162) and with low body mass index values (CLZlow, body mass index <20?kg/m2, n=27). Comparisons of plasma and dose-adjusted plasma concentrations (C/D) of clozapine were based on the Spearman?s correlation (rs), Kruskal Wallis and Mann-Whitney-U tests. For percentages we used the Pearson chi-square test (?2). To assess effects of confounders we used bootstrapping analysis of covariates.Results/outcomes:Regarding demographic characteristics, groups differed only for sex percentage with more females than males in CLZlow and CLZhigh compared to CLZ0 (p=0.001 for ?2 test). Plasma and C/D values were positively associated with body mass index (rs=0.108, p=0.022 and rs=0.156, p=0.001 respectively). Intergroup differences were observed for plasma and dose-adjusted concentrations of clozapine (p=0.031 and p=0.029 for Kruskal Wallis respectively): post-hoc pairwise comparisons showed higher plasma concentrations and C/D of clozapine in CLZhigh compared to CLZ0 (p=0.014 and p=0.007 respectively for Mann-Whitney U-test), by mean 21 and 18%, respectively. Differences for C/D values remained after accounting for sex (p=0.02).Conclusions/interpretation:In obese patients, bioavailability, distribution or elimination of clozapine may be altered due to increased clozapine deposits in fat tissue and hepatic enzyme activity changes. | ||
| 650 | 4 | |a body mass index | |
| 650 | 4 | |a clozapine | |
| 650 | 4 | |a obesity | |
| 650 | 4 | |a pharmacokinetics | |
| 650 | 4 | |a Therapeutic drug monitoring | |
| 700 | 1 | |a Haen, Ekkehard |e VerfasserIn |4 aut | |
| 700 | 1 | |a Hiemke, Christoph |e VerfasserIn |4 aut | |
| 700 | 1 | |a Bochon, Benjamin |e VerfasserIn |4 aut | |
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