Background: To evaluate the efficacy of a single intramuscular adminsitration of long-acting omeprazole (LA-OMEP) in increasing gastric pH in dogs.Hypothesis: We hypothesized that LA-OMEP would meet in healthy dogs the clinical goals defined for human patients for treatment of gastroduodenal ulceration.
Animals: Nine healthy research dogs.Methods: Prospective experimental study. Dogs were given a 4 mg/kg intramuscular injection of LA-OMEP. Intragastric pH was continuously recorded on treatment days 0 to 7. Daily mean pH and mean percentage time (MPT) intragastric pH was ≥3 or ≥4 were determined.
Results:The mean onset of action for the LA-OMEP was 98.11 min (SD 46.39). The mean number of days the dogs' pH met established goals for MPT pH ≥3 was 5.5 days (range, 3-7) and 5.25 days for MPT pH ≥4 (range, 3-7). Long-acting omeprazole met the human clinical goals pH ≥3 for 72 hours in 8/8 of the dogs and MPT pH ≥4 for 96 hours in 7/8 of dogs.Conclusions and Clinical Importance: The LA-OMEP formulation produced gastric acid suppression in healthy dogs for an average of 5 days and up to 7 days, after a single intramuscular injection. No major adverse effects were observed.acid suppression, bravo monitoring, canine intragastric pH, proton pump inhibitor
| INTRODUCTIONGastrointestinal (GI) bleeding is common in critically ill dogs and is a cause of increased morbidity and case fatality. 1,2 Clinical signs of GI bleeding include anorexia, lethargy, vomiting, abdominal pain, hematemesis, melena, and hematochezia. 3,4 Central to the treatment of upper GI bleeding is inhibition of gastric acid suppression through the administration of gastric acid-suppressant treatment. 1,4,5 In human patients, the use of proton pump inhibitors (PPIs) reduces both bleeding risk and the need for endoscopic intervention in bleeding patients. 4,6 Suppressing gastric acid production and maintaining intragastric pH ≥3 and ≥4 for 75% and 67% of the day promotes the healing of duodenal ulcers and gastroesophageal reflux disease in human patients, respectively. 7,8