Effect of romifidine on gastrointestinal motility, assessed by transrectal ultrasonography.
Authors: Freeman S L, England G C
Journal: Equine veterinary journal
Summary
# Editorial Summary: Romifidine's Effects on Equine Gastrointestinal Motility Romifidine, a widely used sedative in equine practice, significantly suppresses gastrointestinal motility—a finding with important clinical implications for anaesthesia and recovery protocols. Freeman and England employed transrectal ultrasonography to measure small intestinal, caecal and colonic contractions in six horses before and after romifidine administration (80 and 120 micrograms/kg bodyweight) over a four-hour period, comparing responses to saline controls in a blinded, crossover design. Both sedative doses produced marked reductions in bowel motility characterised by non-propulsive contractions, whereas control measurements showed only minor, non-significant decreases over the same timeframe. The transrectal ultrasonography technique proved reliable for quantifying these changes in real time, offering clinicians an objective means of assessing drug effects on intestinal function. Since impaired gastrointestinal transit during sedation increases colic risk in the perioperative period, these findings reinforce the need for careful monitoring and peri-anaesthetic management protocols—particularly extended recovery times and cautious refeeding strategies—when romifidine is used in clinical cases.
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Practical Takeaways
- •Romifidine causes significant suppression of intestinal motility in horses; clinicians should monitor GI function closely when using this sedative, particularly at higher doses
- •Transrectal ultrasound is a practical diagnostic tool for assessing intestinal motility changes in response to medications
- •The nonpropulsive contractions induced by romifidine may increase colic risk; consider GI implications when selecting sedation protocols
Key Findings
- •Both 80 and 120 microg/kg doses of romifidine produced marked decreases in gastrointestinal motility in horses
- •Romifidine administration was associated with reduced nonpropulsive contractions of the small intestine, caecum, and left ventral colon
- •Transrectal ultrasonography proved suitable for monitoring changes in intestinal motility type and frequency
- •Control group showed only slight nonsignificant decrease in motility over 4-hour period