I agree that it's best to talk to your doctor about
it. It can depend on your disease as to whether or not they think it's okay for you.
With that said I've taken it every day for over a decade. Before getting diagnosed I was at around 5-6 Immodium a day. It helped, but honestly really didn't touch the pain and D I had back then. Which amazed everyone I knew, because if they took that much they'd be plugged for weeks! Now I also take Questran, and that helps me SO much. My "magic bullet," as I call it, is my questran and 2 immodium daily. Without it I wouldn't have a quality of life!
Of course it doesn't do much if I'm in a full out flare. I lost my gallbladder several years back, so I'm also dealing with having diarrhea from too much bile in my system.