I also developed UC, actually ulcerative proctitis, in 1998. To make my long story short, I was first on prednisone with Asacol. Two years later switched from the Asacol to Colazal. Two years after that the doctor added 6MP. The 6MP has not kept me out of flares and I am now on Remicade because I have become prednisone dependent and the doctor said there are more long standing adverse effects from prednisone than Remicade. I can believe that because I already have osteoporosis, high blood pressure and while on it, prednisone induced diabetes....ugh.
After my first two infusions I felt great but after my 3rd infusion of Remicade I developed chills, fever of 101, diarrhea, nausea and body aches. This was two days after the infusion and the symptoms only lasted 24 hrs. Within a few days I started to flare again but not as bad as usual. The doctor has me on a short course of prednisone. We won't know whether I just had a stomach bug or I already built up antibodies to the Remicade until after my next infusion on the 26th of February. I am 63 yrs old. Wasn't diagnosed until I was 52.
I wish you well.