I just read your message and thought I might have some information that could help your dad. I have recently been diagnosed with a glialblastoma multeforme stage 4 tumor. Most of the tumor was surgigaly removed and I am currently doing radiation and chemotherapy at the same time. I wake up every morning by 9am. I take 1500mg of kepre for siezures, 4 mg of dechodron(steroid)for brain swelling and 30 mg of pepcid to protect my stomache form ulcers. Then I eat breakfast. I have to finish eating by 9:30. This allows my body 2hrs to digest before taking my anti nausea medicine. At 11:30 I take kytril(anti nausea). At 12:30 I take 135mg of Temador(Chemotherapy) At 1:30 I go recieve my radiation treatment. The Kytril is amazing! I have not felt sick at all. THis has enabled me to keep my appetite. The temador is very tolerable. As for the radiation, I do feel fatigued 2-4 hours afterward. Usually I will eat a meal about an hour after radiation. This gives me a little more energy. I do not know if the treatment and meds are working yet becouse I am only 4 weeks into my radiation. See if your dad can take Kytril for the nausea. It is working for me, I hope it can work for him. Best of luck. I will post again when I know more about my situation.