• Open Access

Effects of Prednisone Alone or Prednisone with Ultralow-Dose Aspirin on the Gastroduodenal Mucosa of Healthy Dogs

Authors

  • A. Heather Graham,

    1. Department of Small Animal Clinical Sciences, C.R. Roberts Professor Small Animal Medicine, Virginia-Maryland Regional College of Veterinary Medicine, Virginia Tech, Blacksburg, VA.
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  • Michael S. Leib

    1. Department of Small Animal Clinical Sciences, C.R. Roberts Professor Small Animal Medicine, Virginia-Maryland Regional College of Veterinary Medicine, Virginia Tech, Blacksburg, VA.
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Corresponding author: Michael S. Leib, DVM, MS, Diplomate ACVIM, Department of Small Animal Clinical Sciences, C.R. Roberts Professor Small Animal Medicine, Virginia-Maryland Regional College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061; e-mail: mleib@vt.edu or heath06@vt.edu.

Abstract

Background: The coadministration of prednisone and ultralow-dose aspirin has been recommended for the management of various diseases, but the safety of this combination in dogs has not been studied.

Hypotheses: The gastroduodenal lesions associated with prednisone and ultralow-dose aspirin administration will be similar to those caused by prednisone alone, but both treatments will result in more severe lesions than placebo.

Animals: Eighteen healthy adult purpose-bred dogs.

Methods: Randomized, blinded, placebo-controlled study of 3 treatment groups for 27 days: placebo, prednisone, and prednisone and aspirin. Gastroduodenoscopy was performed before and on days 5, 14, and 27 of treatment and mucosal lesions scores were assigned. Mucosal lesion scores were compared by a Kruskal-Wallis test. Clinical signs were compared by the Friedman's chi-square test (significance at P < .05).

Results: There were no significant differences in the gastroduodenal lesion scores among groups, or within groups at any time during the study. Significantly more dog-days of diarrhea occurred in the prednisone and aspirin group during treatment, compared with baseline. No significant differences in clinical signs were found among any of the groups.

Conclusion: The concurrent use of prednisone and ultralow-dose aspirin did not increase the severity of gastroduodenal lesions compared with prednisone or placebo. Coadministration of prednisone and ultralow-dose aspirin increases the frequency of mild, self-limiting diarrhea in some dogs.

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