Physiologically Based Pharmacokinetic Modeling of Meropenem in Preterm and Term Infants.

Conference Paper

BACKGROUND: Meropenem is a broad-spectrum carbapenem antibiotic approved by the US Food and Drug Administration for use in pediatric patients, including treating complicated intra-abdominal infections in infants < 3 months of age. The impact of maturation in glomerular filtration rate and tubular secretion by renal transporters on meropenem pharmacokinetics, and the effect on meropenem dosing, remains unknown. We applied physiologically based pharmacokinetic (PBPK) modeling to characterize the disposition of meropenem in preterm and term infants. METHODS: An adult meropenem PBPK model was developed in PK-Sim® (Version 8) and scaled to infants accounting for renal transporter ontogeny and glomerular filtration rate maturation. The PBPK model was evaluated using 645 plasma concentrations from 181 infants (gestational age 23-40 weeks; postnatal age 1-95 days). The PBPK model-based simulations were performed to evaluate meropenem dosing in the product label for infants < 3 months of age treated for complicated intra-abdominal infections. RESULTS: Our model predicted plasma concentrations in infants in agreement with the observed data (average fold error of 0.90). The PBPK model-predicted clearance in a virtual infant population was successfully able to capture the post hoc estimated clearance of meropenem in this population, estimated by a previously published model. For 90% of virtual infants, a 4-mg/L target plasma concentration was achieved for > 50% of the dosing interval following product label-recommended dosing. CONCLUSIONS: Our PBPK model supports the meropenem dosing regimens recommended in the product label for infants <3 months of age.

Full Text

Duke Authors

Cited Authors

  • Ganguly, S; Edginton, AN; Gerhart, JG; Cohen-Wolkowiez, M; Greenberg, RG; Gonzalez, D; Best Pharmaceuticals for Children Act-Pediatric Trials Network Steering Committee,

Published Date

  • December 2021

Published In

Volume / Issue

  • 60 / 12

Start / End Page

  • 1591 - 1604

PubMed ID

  • 34155614

Pubmed Central ID

  • PMC8616812

Electronic International Standard Serial Number (EISSN)

  • 1179-1926

Digital Object Identifier (DOI)

  • 10.1007/s40262-021-01046-6

Conference Location

  • Switzerland