4.4 Review

Glucocorticoid treatment in horses with asthma: A narrative review

Journal

JOURNAL OF VETERINARY INTERNAL MEDICINE
Volume 35, Issue 4, Pages 2045-2057

Publisher

WILEY
DOI: 10.1111/jvim.16189

Keywords

corticosteroid; dexamethasone; heaves; horse; inhalation

Funding

  1. Fonds de Recherche du Quebec en Sante [272483]

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Despite extensive research efforts, glucocorticoids remain crucial in treating asthma in horses. There are still many unknowns regarding their use, such as comparative efficacy of different drugs, minimal effective doses, and the mechanisms of variable modulation of airway inflammation. This structured review aims to report and compare the effects of various glucocorticoids in asthmatic horses, highlighting gaps in knowledge and potential areas for future research.
Despite substantial research efforts to improve the treatment and outcome of horses with asthma, glucocorticoids (GC) remain the cornerstone of drug treatment of this prevalent disease. The high efficacy of GC to relieve airway obstruction explains their extensive use despite potential deleterious effects. However, much is yet to be uncovered concerning GC use in horses with asthma, including the comparative efficacy of the different drugs, the determination of minimal effective doses and the mechanisms underlying their variable modulation of airway inflammation. The objectives of this structured review were to report and compare the plethora of effects of the various GC used in asthmatic horses with a focus on impact on lung function, airway inflammation, and bronchial remodeling. Adverse effects are also briefly described, with an emphasis on those that have been specifically reported in horses with asthma. Ultimately, we aimed to highlight gaps in the literature and to identify future research areas.

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