See why NSAIDs can increase certain gastrointestinal risks.
NSAID inhibition of COX-1 in the stomach can diminish the COX-1 mediated role in gastric mucosal protection, which can lead to GI side effects such as ulcers and bleeding.1-4
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References: 1. Bhatt DL, Scheiman J, Abraham NS, et al. ACCF/ACG/AHA 2008 expert consensus document on reducing the gastrointestinal risks of antiplatelet therapy and NSAID use. Circulation. 2008;118(8):1894-1909. 2. Hirschowitz BI. Nonsteroidal anti-inflammatory drugs and the gastrointestinal tract. Gastroenterol. 1994;2(3):207-223. 3. Blot WJ, McLaughlin JK. Over the counter non-steroidal anti-inflammatory drugs and risk of gastrointestinal bleeding. J Epidemiol Biostat. 2000;5(2):137-142. 4. Cheatum DE, Arvanitakis C, Gumpel M, Stead H, Geis GS. An endoscopic study of gastroduodenal lesions induced by nonsteroidal anti-inflammatory drugs. Clin Ther. 1999;21(6):992-1003.