zevalin .... in our future

My husband has completed his chemo (Rchop) and will be starting Zevalin and Rituxan in a few weeks. We meet with the radiologist tomorrow to discuss the zevalin regiment. WE know very little about this drug. Does anyone have advice or suggestion of a list of questions we should ask the DR. My husband was diagnosed in Feb, with NHL. Had to be the worst day of my life. He did 6 months of chemo and last scan should no disease thank god !! however he is only 49 and we know we have along road ahead of us.

I have to say his attitude has been so wonderful. He was normally a very negative person and he has completely changed his out look on life. He is really really my hero.
if anyone has advice on zevalin please let me know.

Thanks