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Related Experiment Videos

An extended interval dosing method for gentamicin in neonates.

M D Stickland1, C M Kirkpatrick, E J Begg

  • 1Department of Paediatrics, Neonatal Intensive Care Unit, Christchurch Womens Hospital, Christchurch, New Zealand.

The Journal of Antimicrobial Chemotherapy
|December 26, 2001
PubMed
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Clinical pharmacology and therapeutics·2017

Standard gentamicin dosing in neonates often fails to achieve therapeutic levels, risking toxicity. An extended interval dosing strategy significantly improves gentamicin

Area of Science:

  • Neonatal pharmacology
  • Pediatric infectious diseases
  • Clinical pharmacokinetics

Background:

  • Traditional gentamicin dosing regimens (every 8-24 hours) in neonates frequently result in suboptimal peak concentrations (Cmax) and elevated trough concentrations (Cmin).
  • This suboptimal pharmacokinetic profile can lead to both treatment failure due to sub-therapeutic levels and increased risk of toxicity.

Purpose of the Study:

  • To evaluate the efficacy of an extended interval gentamicin dosing strategy in neonates.
  • To determine if this new dosing method can achieve ideal concentration-time profiles for improved efficacy and reduced toxicity.

Main Methods:

  • Prospective audit of 53 neonates receiving traditional gentamicin dosing (2.5 mg/kg every 8-24 h).
  • Development of an extended interval dosing method (24, 36, 48 h) via simulation for infants weighing 0.75-5 kg.

Related Experiment Videos

  • Prospective audit of 51 neonates receiving the extended interval dosing method.

    • Main Results:

    • Traditional dosing resulted in sub-therapeutic Cmax in 62% and elevated Cmin in 15% after the first dose.
    • Extended interval dosing achieved a mean Cmax of 13.1 mg/L and a mean Cmin of 0.7 mg/L after the first dose.
    • 78% of neonates on extended interval dosing achieved Cmax >10 mg/L, with acceptable 24-hour exposure (AUC0-24 = 93 mg*h/L).

    Conclusions:

    • Extended interval gentamicin dosing is a superior strategy for neonates.
    • This method optimizes gentamicin's concentration-dependent killing effect while minimizing toxicity.
    • The developed dosing method demonstrates good predictive ability for achieving therapeutic gentamicin levels in neonates.