Pharmacokinetics of ticarcillin and clavulanic acid given in combination to adult horses by intravenous and intramuscular routes.

This research article explores the breakdown and absorption of two drugs, ticarcillin and clavulanic acid, in horses when given through intravenous (IV) and intramuscular (IM) means.

Objective of the Study

The study aimed to understand the pharmacokinetics, essentially how a body processes a drug, of ticarcillin and clavulanic acid, both separately and together when administered via intravenous (IV) and intramuscular (IM) routes in adult horses. The main parameters researched were the elimination half-life and bioavailability of these two drugs.

Study Design and Methodology

• The study was carried out on six healthy adult horses.
• Both drugs were given to the horses via IV and IM methods.
• The disposition of ticarcillin and clavulanic acid were studied separately.
• The researchers followed a two-compartment model for ticarcillin and a one-compartment model for clavulanic acid to predict their behavior within the organism. These models are often used in pharmacokinetics to understand the distribution and elimination of a drug in a body.

Key Findings

The key findings in the pharmacokinetics of these two drugs include:

• For ticarcillin, when given intravenously, the elimination half-life was found to be 1.0 hour, implying that the concentration of the drug decreases by half in the body within this duration.
• For clavulanic acid, when given intravenously, the elimination half-life was shorter, only 0.40 hour.
• The elimination half-lives of both drugs were found to be longer when they were administered intramuscularly (ticarcillin 1.8 hours and clavulanic acid 1.2 hours).
• The bioavailability, which measures how much and how quickly a drug enters the bloodstream, of ticarcillin was 84.4%, and for clavulanic acid it was higher at 94.3%. This shows that a significant amount of both drugs are effectively absorbed by the body after administration.

This comprehensive analysis of pharmacokinetics in horses contributes to the field of veterinary medicine, providing useful information on the behavior of these two drugs in the equine body. This could be instrumental in managing the dosage and route of administration of these drugs in horses for effective results.