Hi Stephanie,
I have lost some hair with my treatment, but thought it had to do with my pred, not my azathioprine/Imuran. Hmmm. My hair loss is all around the back of my head and by my ears where I put on my glasses. I figure the hair got really brittle and just broke off. It's starting to grow back now and no-one would notice except me (and my hairdresser)- so don't worry, no wig required! Good luck with your treament, hope you find the winning combination!
~Kathy