Related Experiment Videos
Oral absorption of flucloxacillin in infants and young children
Insights
Flucloxacillin bioavailability varies in pediatric patients. Infants under 6 months showed better absorption of the mixture, while older children had higher plasma concentrations with tablets, regardless of food intake.
Area of Science:
- Pharmacology
- Pediatric Medicine
- Drug Bioavailability
Background:
- Flucloxacillin is a commonly prescribed antibiotic for bacterial infections.
- Understanding its pharmacokinetic profile in pediatric populations is crucial for effective dosing.
Purpose of the Study:
- To evaluate the oral bioavailability of flucloxacillin in infants and children.
- To compare absorption between different formulations (mixture vs. tablets) and age groups.
- To assess the impact of food on flucloxacillin absorption.
Main Methods:
- Oral administration of flucloxacillin at a dose of 12.5 mg/kg.
- Measurement of peak plasma concentrations and time to peak concentration.
- Comparison of absorption in infants (<6 months) versus older children.
- Evaluation of different formulations (mixture and tablets).
- Assessment of administration with or without food.
Main Results:
- Peak flucloxacillin concentrations were achieved at 60 minutes post-dose.
- Plasma concentrations declined rapidly, becoming low in older children by 4 hours.
- Infants under 6 months demonstrated better absorption from the mixture formulation.
- Older children achieved higher plasma concentrations with tablets compared to the mixture.
- No significant difference in flucloxacillin concentration was observed when administered with or without breakfast.
Conclusions:
- Age and formulation significantly influence flucloxacillin bioavailability in pediatric patients.
- The mixture formulation appears more suitable for infants, while tablets may be preferred for older children.
- Flucloxacillin absorption is not significantly affected by food intake in this population.
Abstract:
The bioavailability of flucloxacillin (Heracillin) following oral administration was determined in infants and children. After a dose of 12.5 mg/kg, peak concentrations were achieved at 60 min. which declined rapidly and were low in older children only 4 hours afterwards. Infants below 6 months of age showed a better absorption when given the mixture than older children. Older children achieved higher plasma concentrations when given tablets than when given equal doses of the mixture. There was no difference in the concentration when the dose was given to the subject when fasting, or with breakfast.