This is going to sound strange, but you might ask the Onc. about ritalin (the med. for ADHD or ADD). At the Oncology conference in Orlando last summer, good results using it for increased energy. The nurse-practitioner in my Onc.s office was at the presentation. She gave me a Rx for it, but I never tried it. Good luck. If he uses steroids, it seems to be that he should start with a very low dose.
Muriel K