A Retrospective Study Evaluating Neonatal Vancomycin Loading Doses to Achieve a Therapeutic Target

Area of Science:

• Neonatal pharmacology
• Infectious disease management
• Antibiotic pharmacokinetics

Background:

• Vancomycin, a key antibiotic for Gram-positive infections, has debated benefits regarding loading doses in neonates.
• Optimizing vancomycin therapy is crucial for treating serious neonatal infections.

Purpose of the Study:

• To evaluate the impact of vancomycin loading doses on achieving therapeutic targets in neonates with sepsis.
• To compare vancomycin target attainment before and after updated prescription guidelines.

Main Methods:

• Retrospective cohort study in a South African neonatal unit.
• Bayesian modeling used to calculate vancomycin area under the curve from trough concentrations.
• Comparison of target attainment (AUC0-24h/MIC ≥400) between neonates with and without loading doses.

Main Results:

• Loading dose group showed a 2-fold increased odds of target attainment.
• Significantly higher early target attainment (8-12 hours) in the loading dose group (92.4% vs 61.0%).
• Overall 24-hour target attainment and nephrotoxicity rates were similar between groups.

Conclusions:

• Vancomycin loading doses may enhance early therapeutic target attainment in neonates.
• The findings support considering loading doses for faster vancomycin efficacy in neonatal sepsis.