Mesalamine
"I use to be on Asacol 400mg, but they stopped making or something. So, I've been on Asacol HD 800mg for about a year. I think it's the best for me, because I really haven't had any severe or major side effects from the medicine. It is doing the job it is supposed to do. I've been taking Asacol for over 20 years. Never had to try anything else, but for some reason they want me to try Imuran, and I don't like what the reviews are saying about it.  Like they say, if it's not broke don't fix it.  Overall, I've had some flares over the 20 yrs., but nothing is worth me having to get use to another medicine."