The excretion of ibuprofen by the horse – a preliminary report.

This research studies how the anti-inflammatory drug Ibuprofen is metabolized and excreted in horses, revealing it takes about 8 hours for the drug to clear from the blood and about 28 hours to clear from the urine.

Objective

The main objective of this research was to examine how Ibuprofen, a common anti-inflammatory drug, is excreted by horses. The study focused on the duration it takes for the drug to be eliminated from the horse’s blood and urine after administration.

Methodology

• The study measures the levels of Ibuprofen in a horse’s blood and urine over a 24-hour period after a 12-gram dose was administered.
• The amounts of Ibuprofen were detected using gas-liquid chromatography of the silylated derivative, a process aimed at separating and analyzing volatile substances within the blood and urine.

Findings

• After the administration of Ibuprofen, its peak levels in plasma were observed within 30 to 60 minutes. The drug was no longer detectable in the plasma by 8 hours.
• Peak urinary levels of the drug were observed 200 to 300 minutes (3-5 hours) after the dosing was administered, and the drug was no longer detectable in the urine by about 28 hours.
• The study found that only 2% to 6% of the unchanged Ibuprofen was actually excreted in the urine, meaning that the majority of the drug was metabolized or otherwise removed from the body via other excretion processes.

Implications

• The findings of this research may be crucial for veterinary medication as it provides better understanding of Ibuprofen metabolism in horses.
• This information is also valuable in formulating dosing schedules for Ibuprofen administration in horses, ensuring that the drug does not accumulate to potentially toxic levels within the horse’s system.