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Dose Optimization of Gentamicin in Critically Ill Neonates.

Kannan Sridharan1, Muna Al Jufairi2,3, Ali Mohamed Qader4

  • 1Department of Pharmacology & Therapeutics, College of Medicine & Medical Sciences, Arabian Gulf University, Manama, Bahrain.

Current Drug Metabolism
|May 13, 2020
PubMed
Summary

Gentamicin dosing in critically ill neonates needs adjustment. Increasing the dose to 5-6 mg/kg/day improves achievement of both peak concentration (Cmax) and area-under-the-curve (AUC0-24) targets.

Keywords:
AminoglycosidesBayesianMonte Carlo simulationsclinical pharmacokineticsdosing strategygentamicin.

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Area of Science:

  • Neonatal pharmacology
  • Pediatric critical care
  • Antibiotic dosing optimization

Background:

  • Gentamicin dosing in critically ill neonates remains a challenge.
  • Optimizing gentamicin therapy is crucial for effective treatment and minimizing toxicity.

Purpose of the Study:

  • To evaluate gentamicin's peak concentration (Cmax) and area-under-the-time-concentration curve (AUC0-24) in critically ill neonates.
  • To simulate optimal gentamicin doses using Monte Carlo methods for improved therapeutic outcomes.

Main Methods:

  • Retrospective analysis of 82 critically ill neonates.
  • Bayesian pharmacokinetic modeling to predict Cmax and AUC0-24.
  • Monte Carlo simulations for dose recommendations across different birth weight categories.

Main Results:

  • The current 4 mg/kg/day dose achieved target Cmax in 75% of neonates but recommended AUC0-24 in only 25%.
  • Premature neonates showed higher Cmax and AUC0-24 values.
  • Simulations suggested 5-6 mg/kg/day achieves target Cmax in 90% of neonates.

Conclusions:

  • The current gentamicin dose is insufficient for achieving recommended AUC0-24 in many neonates.
  • Increasing gentamicin dosage to 5-6 mg/kg/day is recommended to optimize both Cmax and AUC0-24.
  • Adjusted dosing strategies are essential for effective gentamicin therapy in critically ill neonates.