Sorry, not sure how long it's taking to help people. For that matter, I'm not sure if it even is helping anybody. Initial trial results have seemed positive, but I'm not certain that anything has been officially presented.
Additionally, I believe the only trials currently being run on CellCept are using it in conjunction with one of the interferons on relapsing remitting patients. Since I'm PPMS, this is really a shot in the dark.
Can't report any dramatic results. I started out taking two 500 mg pills a day, which made me extremely fatigued and kind of achy. The doctor dials me back to one 500 mg pill a day, which has been easier to take. I'm supposed to resume two pills a day next week. As I said, I've not seen any benefit MS wise.
As for the mechanism of the drug, I believe it inhibits the production of both T and B cells, thereby resulting in a general dampening of the immune system. CellCept's approved use is an anti-rejection drug for transplant patients...