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Dogs, cats and horses
May Be Prescribed by Vets for:
Esophageal reflux or megaesophagus, anti-emetic, post-operative ileus, delayed gastric-emptying, megacolon.
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Cisapride is a third-generation benzamide that is used in human and veterinary medicine as a motility-enhancement drug. Motility disorders of the gastrointestinal (GI) tract are a common clinical problem in companion animals. Post-operative ileus is a common and particularly difficult complication seen after abdominal surgery in horses. Cisapride once was used as a motility enhancement drug in human medicine but it is no longer manufactured or used for this purpose.
Cisapride activates acetylcholine release from the mesenteric plexus, which in turn stimulates GI smooth-muscle. Cisapride is a serotonergic agonist. Cisapride can show activity on the smooth muscle throughout the GI tract. Anatomic differences between species can affect clinical efficacy. For example, cisapride is not used generally to manage megaesophagus in dogs because they lack smooth muscle in the esophagus. Like cisapride, metoclopramide and domperidone also are drugs in the benzamide class. Cisapride does not increase gastric acid secretion.
Cisapride has been used widely to treat gastric-emptying disorders, intestinal transit and other motility disorders in both dogs and cats. It accelerates emptying the stomach and propulsion of food through the intestines by increasing peristalsis. Cisapride is used in cats to manage chronic constipation and megacolon.
Work in humans has shown that cisapride is better absorbed when given with food. In small-animal practice it usually is recommended that cisapride be given orally 15 minutes before feeding.
Post-operative ileus (POI) is a common and serious complication in horses that have had abdominal surgery, particularly surgery of the small intestine. Several clinical trials in the early 1990s supported the use of cisapride to treat POI in the horse but more recent work done in vitro demonstrated some receptor differences in the horse jejunum. Possible species differences and the variable results of different research-models indicate a need for more research. Because POI may be caused by multiple factors (endotoxemia, distension, inflammation) it is possible that the response to prokinetic agents such as cisapride may be influenced by these different underlying causes. At this time the effect of cisapride on gastrointestinal motility in the horse remains unclear and there does not appear to be a consensus of opinion regarding the use of prokinetic agents in the prevention of POI. Cisapride absorption in the horse has been investigated when given orally, intravenously, intra-muscularly and rectally. Absorption after rectal administration is negligible.
GI symptoms including abdominal pain and diarrhea are common.
There is a wide margin of safety with cisapride. Extremely high doses can potentially cause GI distress, difficulty breathing and CNS signs. Oral overdose of Cisapride should be handled using standard GI emptying procedures, activated charcoal and supportive care. Cardiac monitoring for arrhythmia is suggested.
Dr. Barbara Forney is a veterinary practitioner in Chester County, Pennsylvania. She has a master's degree in animal science from the University of Delaware and graduated from the University of Pennsylvania School of Veterinary Medicine in 1982.
She began to develop her interest in client education and medical writing in 1997. Recent publications include portions of The Pill Book Guide to Medication for Your Dog and Cat, and most recently Understanding Equine Medications published by the Bloodhorse.
Dr. Forney is an FEI veterinarian and an active member of the AAEP, AVMA, and AMWA.
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