Help! losing weight

For the last 3 years I've been battling cancer treatment.  In 2005 I underwent 6 rounds of high dose chemo and 2 stem cell transplants.  All the while, I was also taking Thalidomide and Dexamethasone in pill form which I still take even now.  When I was getting chemo.  I lost weight and the doctors were quite concerned about my weight loss.  But now, I'm worried about my weight gain.I've been on Thalidomide and Dexamethasone so long now that I am having a very difficult time losing weight.  Doctors and pharmacist both have told me it is very hard if not impossible to lose weight while taking Dexamethasone or any steroid.  Well, I can't except that.So does anyone have any suggestions as...