Laura - My son also had horrible nausea and the doctors even put him on two breaks during the radiation treatments. He was switched from Amifostine to Compazine but it didn't seem to help too much. He drank a LOT of water,too. Towards the end of treatment it was really bad but even when they offered him another break he refused and kept going just to get it over with. Just when I thought he couldn't make it anymore, he somehow dragged himself into the Rad room and out again. He slept a lot, too. . . so much that there were times I would go into his room just to make sure he was still breathing! Knowing someone else made it thru helps to know that it's possible and it does get so much better. Your Dad's sense of humor will come back - my son's did and better than ever! Take care of yourself, too, Laura and hang on to the small successes or improvements along the way.