Effects of Orally Administrated Mosapride, a 5-HT₄ Receptor Agonist on the Digestive Tract of Horses

Abstract

The effects of mosapride, a 5-hydroxytryptamine 4 (5-HT₄) receptor agonist, on the motility of horse small intestine were examined by means of electrointestinography (EIG). Six adult healthy thoroughbreds were used, in which EIG signals from the small intestine were measured by a Degetorappar EGG system. Mosapride, dissolved in 200 ml water, was orally administered at a dose of 2 mg/kg. The total power of EIG signals at a frequency band of 3 cpm was 419.1 ± 122.0 (μV) ² × cpm (n=6) before, and 2,093.6 ± 850.0 (μV)² × cpm (n=6) after the drug administration, the latter mean value being significantly greater than the former. This result suggests that mosapride has a prokinetic action on the motility of horse small intestine.