Vancomycin Dosing Assessment in a Tunisian Pediatric Population
Safa Souissi1,2,3, Syrine Ben Hammamia1,2,3, Mouna Ben Sassi1,2,3
1Department of Clinical Pharmacology, National Center of Pharmacovigilance, Tunis, Tunisia.
Insights
Vancomycin dosing in children needs improvement. Few pediatric patients achieved therapeutic vancomycin levels, highlighting the need for personalized dosing strategies and better monitoring in this population.
Area of Science:
- Pharmacology
- Pediatric Medicine
- Infectious Diseases
Background:
- Vancomycin is a critical antibiotic for gram-positive bacterial infections.
- High interindividual variability necessitates therapeutic drug monitoring, particularly in pediatric patients.
- Validated data for vancomycin monitoring in children is limited.
Purpose of the Study:
- To assess vancomycin plasma concentrations in Tunisian pediatric patients.
- To evaluate the influence of patient age and administration mode on vancomycin levels.
- To identify gaps in current vancomycin prescribing practices for children.
Main Methods:
- Retrospective study at the National Pharmacovigilance Center in Tunis.
- Inclusion of 146 pediatric patients, stratified by age.
- Evaluation of vancomycin levels associated with initial doses, comparing continuous and intermittent infusion.
Main Results:
- Only 11.8% of initial trough concentrations were therapeutic at an average dose of 38 mg/kg/d.
- Continuous infusion achieved therapeutic levels in 29.5% of cases (average dose 44 mg/kg/d).
- Infants and children required higher doses; neonates required lower doses to reach therapeutic ranges.
Conclusions:
- Existing vancomycin prescribing practices in pediatrics lack sufficient clinical validation.
- Current monitoring strategies may be inadequate for optimizing pediatric vancomycin therapy.
- Personalized dosing, such as Area Under the Curve (AUC)-guided monitoring, is recommended for improved outcomes.
Background:
Vancomycin is a glycopeptide antibiotic indicated in patients suffering from infections caused by gram-positive bacteria. Therapeutic drug monitoring is crucial because of its high interindividual variability, especially in pediatric populations. However, validated data guiding vancomycin monitoring in pediatric patients are lacking. This study aimed to assess vancomycin plasma concentrations in a Tunisian pediatric population according to patient's age and administration mode.
Methods:
A retrospective study was conducted at department of Clinical Pharmacology of National Pharmacovigilance Center. It obtained approval from the Institutional Review Board at Charles Nicolle Hospital in Tunis, Tunisia. Patients included in this study were classified by age. Only vancomycin levels associated with initial doses were evaluated. Continuous and intermittent infusion modes were assessed.
Results:
The study included 146 patients. Each age group was separately evaluated. Only 11.8% of initial trough concentrations were within the therapeutic range with an average dosage of 38 mg/kg/d. Using the continuous infusion, 29.5% of initial concentrations reached the therapeutic range with an average vancomycin dose of 44 mg/kg/d. Only 20.5% of plasma concentrations during continuous infusion were supratherapeutic, compared with intermittent infusion (29.4%). Infants and children required higher daily doses to achieve therapeutic range. Lower doses were needed for prematurely born neonates.
Conclusions:
Although numerous studies have evaluated vancomycin prescribing practices in pediatric populations, clinical data validating recent recommendations remain lacking. More personalized dosing approaches, including Area Under the Curve-guided monitoring, should be established.
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