You'll hear many on this forum refer to Imuran - that's Azathioprine. It's an immunosuppresant and sometimes referred to as a 'steroid-sparing' drug (because it's prescribed to help people reduce their steroid use.) One of the possible risks is shingles (if you've ever had chicken pox) and I did get shingles almost immediately after beginning Imuran. It also caused inflammation in my liver, but a reduction in the dose controlled that. There are other side affects, however. Here's a link to Mayo Clinic's info on Azathioprine.
"If you trust Google more than you trust your doctor than maybe it's time to switch doctors."