Yes, I have chronic lupus nephritis and have had it for 22 years. I was on Cytoxan treatment for 13 months from 1990 through 1991. It has helped preserve my kidney function since the treatment. Of course, different people react differently to it, but hopefully it will help you too.
The side effects are somewhat harsh from Cytoxan. They put you on the lowest dose possible, but it still makes you pretty sick. Luckily, there are much better anti-nausea drugs now than what we had in the '90's. I lost some hair, but it was an all over type of thing and wasn't noticable at all. Cellcept is supposed to do pretty much the same thing, from what I understand, without the side effects.
Good luck with everything! Email me if you wish/need to talk with someone who's been-there-done-that for quite some time now.
So long, and thanks for all the fish!