Pharmacokinetics of intravenous diclofenac sodium in children

Area of Science:

• Pharmacology
• Pediatric Anesthesiology
• Drug Metabolism

Background:

• Diclofenac sodium is a common nonsteroidal anti-inflammatory drug (NSAID).
• Understanding its pharmacokinetics in pediatric populations is crucial for safe and effective use.
• Limited data exists on diclofenac pharmacokinetics in young children.

Purpose of the Study:

• To investigate the pharmacokinetic profile of diclofenac sodium in pediatric patients.
• To compare key pharmacokinetic parameters between young children and adult populations.

Main Methods:

• Intravenous (i.v.) administration of diclofenac sodium at a dose of 0.5 mg/kg.
• Study population included small children aged 4-6 years undergoing surgery.
• Pharmacokinetic parameters including tidal volume (Vt), total plasma clearance, and elimination half-life were assessed.

Main Results:

• Tidal volume (Vt) and total plasma clearance of diclofenac sodium were significantly higher in pediatric patients compared to adults.
• The elimination half-life of diclofenac sodium was similar between the pediatric group and adults.
• These findings suggest altered drug distribution or metabolism in young children.

Conclusions:

• Pediatric patients (4-6 years) exhibit distinct pharmacokinetic characteristics for intravenous diclofenac sodium compared to adults.
• Higher tidal volume and plasma clearance indicate potential differences in drug handling.
• Further research is warranted to elucidate the mechanisms behind these observed pharmacokinetic variations in children.