Pharmacokinetics of imidocarb dipropionate in horses after intramuscular administration.

This research investigates the absorption and elimination of drug imidocarb dipropionate in horses following a single intramuscular injection. The drug, which is usually used in treatment or prevention of Babesia caballi infections, appears to quickly move into storage tissues post-administration and remain in the body for a long duration.

Objective of the Study

• The primary goal of this research was to explore the pharmacokinetic behaviour of the drug imidocarb dipropionate in horses. Specifically, it aimed to see how the drug is absorbed, distributed, metabolized, and excreted following a single intramuscular injection.

Methodology

• A total of eight horses were injected intramuscularly with a one-time dosage of imidocarb dipropionate.
• The dose given was 2.4 mg of the drug for every kilogram of the horse’s body weight, which is the standard dosage for treating Babesia caballi infections or preventing babesiosis.
• Researchers collected blood, fecal, urine, and milk samples from the horses for analysis.
• The team used a high-performance liquid chromatographic method (HPLC) after weak cation-exchange solid phase or liquid-liquid extraction procedures to determine the presence and concentration of imidocarb in the collected samples.

Results

• No plasma concentrations of imidocarb were detected in any of the horses twelve hours after injection.
• The progression of the drug through the body and its elimination pattern suggest it moves quickly to certain storage tissues in the body.
• The drug appears to remain present in the body for an extended period of time.

Implication of Findings

• The research provides evidence of a possible reservoir effect of imidocarb in some tissues.
• This reservoir effect could lead to the drug being undetectable in the plasma of the animals but could remain in sufficient amounts to perform its therapeutic and prophylactic functions.
• The understanding of the pharmacokinetic behaviour of imidocarb can enhance the knowledge of its working mechanism and consequently, may improve its application in treating or preventing infections in horses.