Biological availability of inhaled fluticasone propionate in horses.

The research article investigates the efficacy of the drug fluticasone propionate, delivered through different methods, on suppressing cortisol levels in healthy horses, concluding that aerosolized delivery is the most effective.

Research Aim

• The objective of this study was to examine the bioavailability of fluticasone propionate when administered through different delivery methods (aerosol, intranasal, or oral) to healthy horses. The assumption behind this investigation is that how a drug is delivered can impact its effectiveness.

Research Method

• The research team administered a 3 mg dose of the drug that was evenly divided over morning and evening treatments to the horses for a seven-day period. The focus was on evaluating the efficacy of this drug in suppressing the horses’ cortisol levels, a key indicator of stress and inflammation in the body.

Findings

• The study found that horses which received the aerosolised drug had significantly lower cortisol concentrations, indicating a stronger biological response, on days 5 and 8 as opposed to those given aerosolised placebo.
• In contrast, the horses given nasal and oral doses did not show any significant change in their cortisol levels. This suggests that the bioavailability of fluticasone propionate – or how effectively the drug can be absorbed and used by the body – is notably higher when inhaled versus other delivery methods.

Implication

• The results offer important insights into designing effective treatment strategies for horses by highlighting the superior efficacy of the aerosolised delivery of fluticasone propionate. This can be used in relieving respiratory issues or other health problems in horses that could benefit from lower cortisol levels.