Cellcept is actually a chemotherapy drug for reducing rejection chances in transplant patients. When "cross-purposed" and used for Lupus, et.al, there is a limit to how much they think is safe.
Fortunately for me, when I maxed out at about
18 months, it had already greatly altered the course of my Lupus (in a positive direction), and my blood work was fairly normal.
It is difficult for the kidneys, and I'd certainly keep an eye on kidney performance it they'd wanted to keep me on it "long term".
Lynnwood, Lupus & Sjogren's Moderator, Dx: 2002DIAGNOSING LUPUS & LUPUS RESOURCES
"Life is far too important to be taken seriously." - Oscar Wilde