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Optimal Dosing of Ceftriaxone in Infants Based on a Developmental Population Pharmacokinetic-Pharmacodynamic Analysis

Ya-Kun Wang1, Yue-E Wu2, Xue Li2

  • 1Department of Respiratory Care, Children's Hospital of Hebei Province, Shijiazhuang, China.

Antimicrobial Agents and Chemotherapy
|August 21, 2020
PubMed

Insights

Optimizing ceftriaxone dosing for infants with community-acquired pneumonia is crucial. This study establishes evidence-based regimens, recommending 20 mg/kg for infants under one year and 30 mg/kg for older infants, twice daily.

Area of Science:

  • Pharmacology
  • Pediatrics
  • Infectious Diseases

Background:

  • Ceftriaxone is a key antibiotic for infant community-acquired pneumonia.
  • Current dosing lacks evidence-based optimization, leading to variability.
  • Optimal ceftriaxone dosage for infants remains undefined.

Purpose of the Study:

  • To determine optimal ceftriaxone dosage for infants (1 month to 2 years) with community-acquired pneumonia.
  • To establish population pharmacokinetics and pharmacodynamics of ceftriaxone in this age group.
  • To provide evidence-based dosing recommendations.

Main Methods:

  • Prospective, open-label pharmacokinetic study.
  • Opportunistic blood sampling and high-performance liquid chromatography for drug quantification.
  • Nonlinear mixed-effects modeling (NONMEM) for pharmacokinetic-pharmacodynamic analysis.

Main Results:

  • A one-compartment model with first-order elimination best described ceftriaxone pharmacokinetics.
  • Infant age and weight significantly impacted ceftriaxone pharmacokinetics.
  • Monte Carlo simulations suggested optimal regimens based on a 70% fT>MIC target.

Conclusions:

  • Established population pharmacokinetics of ceftriaxone in infants.
  • Recommended evidence-based dosing: 20 mg/kg twice daily for infants <1 year, 30 mg/kg twice daily for infants >1 year.
  • Optimized dosing aims to improve treatment efficacy for community-acquired pneumonia in infants.

Keywords:
ceftriaxonedosing optimizationinfantspopulation pharmacokinetics

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