I now understand why my neurologist ordered frequent blood tests at first when I went on Imuran.  I looks like I have been luckier, and I am doing better on Imuran.  One of the hardest things about MG seems to be how everyone’s case can be so different, so a lot of trial (and error) is involved in our treatments, even with very good docs on our cases.  Good luck with your treatments going forward!