My 16 year old son started on imuran 4 months ago, but has been on prednisone as well till the imuran kicked in. At our last visit, the doc told us to start weaning down the prednisone. We got down to 5 mg and he started vomiting. The doctor wanted to increase his prednisone, my son refused. So we continue on the wean but he has started with mouth sores and still vomiting occasionally but it is much better. Last month his ESR was 1 and his CRP was.9 This month his ESR is 18 and his CRP is 8.1. Has anyone else experienced these side effects? Could these new values be his new norm, now that the prednisone is almost out of his system? Thanks for listening.