Related Experiment Videos
Gentamicin dosage intervals in neonates: longer dosage interval--less toxicity
1Grantley Stable Neonatal Unit, Royal Women's Hospital, Brisbane, Queensland, Australia.
Journal of Paediatrics and Child Health
|February 3, 1999
Summary
Gentamicin dosing intervals significantly impact toxic trough serum levels in neonates. Intervals of 12 hours for any infant or 24 hours for premature infants (<30 weeks) result in toxic levels, necessitating adjusted gentamicin dosing strategies.
Area of Science:
- Neonatal pharmacology
- Pediatric pharmacokinetics
- Clinical toxicology
Background:
- Gentamicin is a crucial antibiotic for treating neonatal infections.
- Optimizing gentamicin dosing is vital to maximize efficacy and minimize toxicity.
- Toxicity is often associated with elevated trough serum levels.
Purpose of the Study:
- To investigate the incidence of toxic trough serum gentamicin levels in neonates.
- To evaluate the impact of different gentamicin dosage intervals on toxicity.
- To identify safe and effective gentamicin dosing regimens for neonates.
Main Methods:
- Retrospective study of neonates receiving gentamicin between July and December 1995.
- Data collected included birth weight, gestational age, gentamicin dose, trough levels, and renal function indicators.
- Toxic trough serum gentamicin level defined as >= 1.5 mg/L.
Main Results:
- High rates of toxic gentamicin levels were observed across various gestational age groups and dosing intervals.
- Infants aged 30-34 weeks receiving gentamicin every 12 or 18 hours had 100% and 93% toxic levels, respectively.
- For infants >= 35 weeks, 12-hour intervals led to 86% toxic levels, while 24-hour intervals resulted in 13% toxic levels.
Conclusions:
- Starting gentamicin at 12-hour intervals for any neonate, or 24-hour intervals for those <30 weeks gestational age, frequently results in toxic trough levels.
- A 24-hour gentamicin dosing interval appears safe and non-toxic for neonates aged 30 weeks gestational age and greater.