Title wrong.. Not Mathers!! "Mabthera"

I was scanned this Monday to look for leftovers from my thymys surgery removal I had about 12 years ago...
Nothing left.. So now my doctor want to try a different drug for me..

I have been on mestinon and prednisone for 10years noe and its not that good apparently to eat cortisone for that long..

So no he wants me to start with "mabthera"

Experiences??