I have been on cellcept for 2 1/2 years with great results. I have been able to taper down my prednisone dose from 100 mg/day to 10 mg/eod. I had previously been on Imuran but when I started to taper the prednisone I wound up in the hospital 3 times in 3 months for plasma-pheresis treatments. Since starting the cellcept I have not had to have plasma-pheresis or IVIG. It did take a couple months for it to kick in but for me it has been "the" drug that has helped the most.