My Neuro went just the other way. They started me on Imuran then switched me to CellCept. I was on Imuran for 12 months. It made me very sick and I lost 35 pounds. But actually the Imuran worked and we did not know it because the side effects were so bad. Imuran works for a lot of people it just did not work for me keep that in mind. The main side effect was nausea. The last few months I was eating about 500 cal a day. When I went off Imuran and switched to CellCept my doctor apologized and said he knew Imuran was making me sick. The reason we know that the Imuran was working was when he tapered me off after two days I was Superman which lasted about six weeks. I wish you the best the luck and hope it works for you.
Mike