Actions of the novel gastrointestinal prokinetic agent cisapride on equine bowel motility.

The research investigates the impacts of cisapride, a novel gastrointestinal prokinetic agent, on the bowel motility of ponies.

Study Design

• The researchers conducted an evaluation of cisapride’s influence on the bowel motility of four ponies with chronically implanted electromechanical transducers. It’s worth noting that this drug was infused over specific timeframes of 60 minutes at varying dosages (0.05 mg/kg, 0.1 mg/kg, and 0.25 mg/kg).

Major Effects of Cisapride

• Cisapride triggered significant and lasting upsurges in both electrical and mechanical activity at all sites examined. This essentially means that it stimulated increased activity levels in the ponies’ stomachs and intestines.
• In the stomach, cisapride led to an increase in total contraction activity, increased contraction amplitude, and a slight reduction in rate.
• In the small intestine, irregular activity known as phase II was increased through a rise in the number and amplitude of contractions. It also triggered a decrease in the amount of regular activity or phase III activity fronts. This indicates that the drug has varied impacts on different parts of the digestive system.

Side Effects

• The research uncovered certain side effects associated with the administration of cisapride. These include increased bowel sounds and frequency of defecation, slight uptick in heart rate, and transient signs of discomfort at the highest dosage (0.25 mg/kg).

Conclusion

• The study observed that cisapride induced dose-dependent increases in activity in the stomach and small intestine. However, in the left dorsal and small colon, the intermediate dose of 0.1 mg/kg resulted in the greatest and most consistent responses. The findings hence suggest that cisapride has a notable influence on equine bowel motility, with effects differing based on specific concentrations and areas of the digestive system.