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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.
Your doctor can give you medications that can help stop the diarrhea and cramping. Sometimes using bismuth medications like Pepto, can cause black diarrhea. But you should have your stool checked for blood and infection just in case. If your doctor cannot see you now, go back to the ER and demand a stool sample. Also, ask for medications to stop the diarrhea and cramping, so that you can feel better.