Background And Objective: Understanding pharmacokinetic disposition of cefepime, a β-lactam antibiotic, is crucial for developing regimens to achieve optimal exposure and improved clinical outcomes. This study sought to develop and evaluate a unified population pharmacokinetic model in both pediatric and adult patients receiving cefepime treatment.

Methods: Multiple physiologically relevant models were fit to pediatric and adult subject data. To evaluate the final model performance, a withheld group of 12 pediatric patients and two separate adult populations were assessed.

Results: Seventy subjects with a total of 604 cefepime concentrations were included in this study. All adults (n = 34) on average weighed 82.7 kg and displayed a mean creatinine clearance of 106.7 mL/min. All pediatric subjects (n = 36) had mean weight and creatinine clearance of 16.0 kg and 195.6 mL/min, respectively. A covariate-adjusted two-compartment model described the observed concentrations well (population model R, 87.0%; Bayesian model R, 96.5%). In the evaluation subsets, the model performed similarly well (population R, 84.0%; Bayesian R, 90.2%).

Conclusion: The identified model serves well for population dosing and as a Bayesian prior for precision dosing.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7222999PMC
http://dx.doi.org/10.1007/s40262-020-00873-3DOI Listing

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