The evaluation of a patient with chronic diarrhea can be quite frustrating, as it is expensive
and involves multiple diagnostic studies. Moreover, identification of a drug as a cause of
chronic diarrhea is a challenge in patients taking multiple medications. The disease may
either be associated with intestinal mucosal changes, mimicking diseases such as celiac
disease, or purely functional, with no histopathologic change. Drug-induced diarrhea may or
may not be associated with malabsorption of nutrients, and a clinical improvement may …