Hi Rogerm213,
Pred, Imuran and Cellcept are all immunosuppressants and Pred is the fastest acting one. But because it has also some unpleasant side-effects, Imuran or Cellcept are also prescribed but you may have to wait for quite a long time (six months or even more for Cellcept) before they kick in. When they start to be effective, Pred is progressively tapered down to zero in the best cases.
Try to think that your treatment is a rocket, Pred is the first stage and Cellcept (or Imuran) is the second stage.
Mestinon minimizes the symptoms caused by the anti-bodies, the immuno-suppressants lower the production of anti-bodies by your immune system, IVIG and PLEX partially remove chemically or physically the anti-bodies in your blood system and finally thymectomy may act on the production site of the anti-bodies...
For further details on available therapies, see
http://neurotalk.psychcentral.com/post441175-8.html
I hope this will help you,
Maurice.