interstitial cystitis
"I took Elmiron for 8-10 years. Initially, and for several years, it did not cause any negative side effects. However, after taking it for about 5 or so years, I started to have symptoms of colitis/Crohn's. A colonoscopy discovered multiple spots where the lining of the colon was ulcerated. So I was treated for a bowel disease for 6 YEARS. The doctor wanted to put me on something stronger, but I wasn't eager for that. I remember that Elmiron could cause diarrhea as an initial side effect. I hadn't had that problem, but I decided to stop taking the medicine. Within TWO WEEKS, all of my gastrointestinal problems went away. My most recent colonoscopy showed that the tissue had returned to normal. Be aware of late side effects."