I did well on Velcade and had very few side effects. We're all different in how we respond to treatment though. I know someone who's been doing well on Revlimid for over 4 years, but it failed for me in under 8 months.
Would your brother's doctor be open to calling or corresponding with a specialist such as Dr. Berenson, Dr. Durie or Dr. Richardson to help formulate a treatment plan? You could also email the IMF at
TheIMF@myeloma.org to see if they can make some suggestions.
Also, if you sign up for the mailing list, there are lots of patients and family with more experience to draw from.
http://www.mmsupport.net/content/view/188/80/