Tyson, you really got me interested in the question of PLEX and immunosuppressants since my next step is to treat with cellcept or imuran along with IVIG or PLEX. I found this article regarding combined therapies that seems to indicate immunosuppressants and PLEX combined have a synergistic effect leading to a better outcome. Am I reading it right? I hope the link works.

http://www.ncbi.nlm.nih.gov/pubmed/7453714