Pharmacokinetics of ibuprofen in febrile children

Area of Science:

• Pediatric Pharmacology
• Pharmacokinetics
• Drug Safety

Background:

• Acetaminophen is commonly used for pediatric fever, but ibuprofen's pharmacokinetic profile in children is not well-established.
• Limited data exists on ibuprofen's use as an alternative antipyretic in pediatric populations.

Purpose of the Study:

• To investigate the pharmacokinetics of ibuprofen in children aged 3-10 years.
• To evaluate the impact of different ibuprofen dosages (5 mg/kg and 10 mg/kg) on its absorption and elimination in pediatric patients.
• To assess the safety and tolerability of ibuprofen in this age group.

Main Methods:

• A pharmacokinetic study involving 17 pediatric patients (3-10 years) with fever.
• Administration of single oral doses of ibuprofen (5 mg/kg or 10 mg/kg).
• Serial blood sampling over 8 hours, with serum concentrations analyzed using High-Performance Liquid Chromatography (HPLC).

Main Results:

• Ibuprofen serum concentrations varied between 17-42 µg/mL (5 mg/kg) and 25-53 µg/mL (10 mg/kg).
• Pharmacokinetic parameters (tmax, oral clearance, elimination half-life) were similar across both dosage groups and showed no correlation with patient age.
• No adverse events were reported during the study.

Conclusions:

• Ibuprofen pharmacokinetics in children aged 3-10 years appear unaffected by doses ranging from 5 to 10 mg/kg.
• Age does not significantly influence ibuprofen's pharmacokinetic behavior in this pediatric cohort.
• Ibuprofen demonstrates a favorable safety profile for fever management in children within the studied dose range.