It depends. I do know that several members here have had problems with Imuran and when they switched to 6MP they were able to tolerate it well. So in theory it should work in reverse. HOWEVER, Imuran is metabolized into mercaptopurine in the body. 6MP is mercaptopurine.
Moderator Crohn's Disease Forum
CD, Ankylosing Spondylitis, small fiber peripheral neuropathy, avascular necrosis, diffuse connective tissue disease, Sjogren's Syndrome ?