For the short-term, using over-the-counter medications like Imodium can help but this should only be used for no more than a few days at a time. Other things to help with chronic diarrhea include probiotics and eating foods that are high in soluble fiber. This includes things like bananas, canned fruit, grapefruit, pears, figs and oranges.

It helps a lot to know what the diarrhea is from. There are many many causes, but most diarrhea will improve with use of imodium.