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Benicar and Diarrhea. Side effects of the blood pressure medication Benicar may include sprue-like enteropathy, a gastrointestinal disorder that causes diarrhea and other unpleasant complications.
It also has weak antibacterial qualities against bacteria such as Heliobacter. The salicylate component (salicylate is a substance similar to aspirin) seems to have a slight antiprostaglandin effect, assisting in the treatment of some types of diarrhea. Prostaglandins are hormone-like substances that promote the secretion of fluids, often causing diarrhea.