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[Clinical pharmacokinetics and the optimal intravenous ampicillin administration regimen in children]
Insights
This study determined optimal ampicillin dosing for pediatric acute pneumonia. A two-compartmental model informed a regimen providing effective antibiotic levels in children.
Area of Science:
- Pediatric Pharmacology
- Infectious Diseases
- Pharmacokinetics
Context:
- Acute pneumonia is a common childhood illness requiring effective antibiotic treatment.
- Ampicillin is a frequently prescribed antibiotic for bacterial infections in children.
- Understanding drug pharmacokinetics is crucial for optimizing pediatric dosing regimens.
Purpose:
- To investigate the pharmacokinetics of ampicillin in children with acute pneumonia.
- To develop an optimized intravenous dosing regimen for ampicillin in this population.
- To validate the calculated regimen through clinical observation.
Summary:
- Nineteen children (3 months–3 years) received intravenous ampicillin (25 mg/kg).
- A two-compartmental model best described ampicillin's pharmacokinetic profile, with a half-life of 37 minutes and clearance of 7.3 ml/min·kg.
- An optimized regimen (3.5 mg/kg loading dose, 70 µg/min·kg infusion) was calculated and showed good correlation with observed serum levels in 7 children.
Impact:
- Provides a data-driven, optimized ampicillin dosing strategy for pediatric acute pneumonia.
- Enhances therapeutic efficacy and potentially reduces adverse events through precise drug level management.
- Contributes to evidence-based guidelines for antibiotic use in pediatric infectious diseases.
Abstract:
Nineteen children aged 3 months to 3 years were treated with ampicillin for acute pneumonia. The drug pharmacokinetics after a single intravenous administration in a dose of 25 mg/kg was studied. The data of the antibiotic pharmacokinetics in blood serum specimens collected within 3 hours after the drug injection were approximated with the use of the two-compartmental model, which proved to be more adequate than the one-compartmental model. The average period of the antibiotic half-life was 37 minutes and the value of the total clearance was 7.3 ml/min . kg. The optimal regimen for ampicillin administration, i. e. intravenous infusion of the antibiotic at a rate of 70 microgram/min . kg and its administration in a loading dose of 3.5 mg/kg was calculated with the use of the constants of the two-compartmental model. Clinical trials of the above regimen showed satisfactory conformity of the factual and calculated levels of the antibiotic in the blood serum of 7 children.