Diarrhea is a common symptom of various medical conditions. It involves having loose, watery stools three or more times per day. Acute, or short-term, diarrhea usually lasts for a couple of days.

Cephalexin is a generic drug that’s prescribed for certain bacterial infections in adults and children. As with other drugs, cephalexin can cause side effects, such as diarrhea, nausea, or vomiting.

Imodium (loperamide) is an over-the-counter (OTC) medication used to relieve diarrhea in adults and some children. Imodium can cause side effects that range from mild to serious. Examples include ...