Hi Nicki,
I had radiation in December (but no chemo).
Nausea was minor, the soreness to the throat began after a couple of weeks - that seemed to be the hardest part, making it difficult to eat or swallow, so try to "stock up" on calories now if he can with milkshakes, whip cream, etc!

Also fatigue is a major problem. His job now is to fight the cancer, so try to get lots of rest and don't plan on doing much.

Good luck and hope things get better after chemo & radiation!
michelle
ps Not everyone has trouble with constipation, maybe he will be one of the lucky ones as I was (Sometimes with all this you forget to think about what does go right!)