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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.
Benicar is not recommended for the following groups of people: 1  Pregnant women. 2  Nursing mothers. 3  Children under one year of age. 4  Patients with blood volume or salt depletion. 5  Patients with narrowing of arteries.