Are acidophilus chews supposed to give you diarrhea?

Not typically. Acidophilus chews are known to cause harmless effects like hiccups, excess gas and belching. Diarrhea, while uncommon, should be minimal. If you experience any of the following side effects : Rash, itching, hives, swelling of the face, lips, tongue, difficulty breathing, weakness, nausea or vomiting notify your doctor or go to the ER right away.