The Intestine Constipation Constipation can be caused by a variety of medicines. This results in the slow and difficult passage of stool. Medicines also may bind intestinal liquid and make the stool hard. Medicines that commonly cause constipation include antihypertensives, anticholinergics, cholestyramine, iron, and antacids that contain mostly aluminum. Warning sign Constipation that is severe or disabling or that lasts several weeks.
Precautions Drink plenty of fluids.
Eat a well-balanced diet that includes whole grains, fruits, and vegetables. Take laxatives only under a doctor's supervision. Diarrhea Diarrhea is a common side effect of many medicines. Diarrhea is often caused by antibiotics, which affect the bacteria that live normally in the large intestine. Almost any antibiotic may cause C. difficile -induced diarrhea, but the most common are ampicillin, clindamycin, and the cephalosporins.