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Determining the optimal dose size and dosing frequency in pharmacotherapy is crucial for achieving therapeutic effectiveness while minimizing adverse effects. This article explores the methodologies employed in determining these parameters, focusing on their significance and interplay to tailor dosing regimens.Dose Size: Dose size refers to the amount of a drug administered in a single dose. It is determined based on the drug's pharmacodynamics and pharmacokinetics properties and...
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In pediatric medicine, understanding the renal function and drug elimination nuances is crucial for administering safe and effective treatments. Newborns, in particular, display markedly slower renal functions than adults, profoundly affecting how drugs are cleared from their bodies. This slower drug clearance requires clinicians to extend the dosing intervals for many medications to prevent drug accumulation and toxicity while ensuring therapeutic efficacy.One key area where these adjustments...
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Optimizing Gentamicin Dosing in Pediatrics Using Monte Carlo Simulations.

Abdullah Alsultan1,2, Manal Abouelkheir3, Yasmine Elsharawy4

  • 1From the Department of Clinical Pharmacy, College of Pharmacy.

The Pediatric Infectious Disease Journal
|March 19, 2019
PubMed
Summary
This summary is machine-generated.

Optimizing gentamicin dosing in children requires higher doses for effective treatment of Gram-negative infections, especially with higher minimal inhibitory concentrations. Current dosing may be inadequate, necessitating a review of gentamicin breakpoints and safety of increased pediatric doses.

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Area of Science:

  • Pharmacology
  • Pediatric Infectious Diseases
  • Clinical Pharmacy

Background:

  • Gentamicin exhibits concentration-dependent bactericidal activity.
  • Nephrotoxicity is a known adverse effect of gentamicin.
  • Optimizing gentamicin dosing in pediatric populations is crucial for efficacy and safety.

Purpose of the Study:

  • To develop a population pharmacokinetic/pharmacodynamic model for gentamicin in pediatric patients.
  • To optimize gentamicin dosing strategies in children aged 1 month to 12 years.
  • To evaluate the adequacy of current gentamicin dosing against varying minimal inhibitory concentrations (MICs) of Gram-negative organisms.

Main Methods:

  • Retrospective data collection of gentamicin peak and trough concentrations from 107 pediatric patients.
  • Development of a one-compartment population pharmacokinetic model.
  • Monte Carlo simulations to assess target attainment at different gentamicin doses and MICs.

Main Results:

  • The pharmacokinetic model adequately described gentamicin concentrations in pediatric patients.
  • Recommended daily doses of 5-6 mg/kg are sufficient only for Gram-negative organisms with MIC < 1 µg/mL.
  • Higher doses (7-8 mg/kg) are needed for MICs of 1 µg/mL, and even 10 mg/kg showed poor attainment at MIC of 2 µg/mL.

Conclusions:

  • Current gentamicin dosing regimens may be insufficient for treating Gram-negative infections in children, particularly those with higher MICs.
  • Reevaluation of gentamicin's established breakpoints is recommended.
  • Further assessment of the safety and efficacy of higher gentamicin doses in pediatric patients is warranted.