My Mom has been taking Namenda for a couple of yrs. We tried to add Exelon twice, but had to stop due to gastrointestinal problems. We're now trying 5 mg/day of Aricept and after one week is already experiencing diarrhea. Has anyone come up with a solution short of taking her off the Aricept? I hate for her to take immodium as it is difficult to know how much to take and she has ended up in the ER with an impacted bowel previously. She takes her meds with food, except protonix which has to be on empty stomach for indigestion.