Hi Rygon,
I have very little side effects myself (been on Imuran for 14mos). I did notice a few things....my pee became very very dark (and I wasn't dehydrated), I did notice my skin couldn't be out in the sun for prolong periods, as I'd get red patches on my chest and legs. Other than that, nothing really. My white blood cell count did go down, so I've been on 50mg for the past 10mos. The meds were fine with me, although in a flareup at the moment, so not sure what this means.
I actually caught less colds and didn't get the flu (like everyone and their mother did this year). I think I was more careful about washing hands, having hand sanitizer, etc. I also just lived my life as normal. Best of luck, hope you feel ok on it.