Route of Oseltamivir Administration Affects Metabolite Concentrations in Critically Ill Children

Area of Science:

• Pediatric critical care medicine
• Pharmacokinetics and drug metabolism

Background:

• Oseltamivir is a key antiviral medication used in pediatric populations.
• Optimal drug delivery methods are crucial for critically ill children to ensure therapeutic efficacy.

Purpose of the Study:

• To compare systemic exposure of oseltamivir's active metabolite following administration via enteric tube versus oral route in critically ill children.

Main Methods:

• Prospective cohort study design.
• Enrollment of critically ill pediatric patients receiving oseltamivir.
• Measurement of oseltamivir active metabolite concentrations based on administration route.

Main Results:

• Enteric tube administration of oseltamivir was associated with significantly lower concentrations of its active metabolite.
• Oral delivery resulted in higher systemic exposure of the active metabolite.

Conclusions:

• The route of oseltamivir administration significantly impacts the systemic exposure of its active metabolite in critically ill children.
• Findings suggest potential under-dosing with enteric tube administration, warranting further investigation and clinical consideration.