I had pretty much the same experience when I finished radiation. You didn't mention constipation, it also causes nausea and vomiting. Was it the radiation? I don't know - the mucous, poor hydration, pain meds, other meds, laxatives, mouth sores still don't know. I would run it by the doctor, they would prefer he not get sick. Oh, and did I mention that the "Pink Magic" makes me gag and vomit everytime I use it. I also needed to be rehydrated twice (but not weekly). Fluid intake is the most important thing you need 2-3 liters a day - that's 4-6 personal size water bottles in other words, a lot. Make sure he stays hydrated. Stay away from drinks with caffeine.
Is he done with chemo? After my second session I had to use compazine suppositories because I couldn't keep anything down (after the Zofran stopped being effective - about 72 hrs) He needs to have multiple types of antiemetics in his inventory. I have to tell you, I have thrown up more in the last 3 months than in my entire life combined - I'm actually getting used to it.
It IS frustrating when you have worked hard to intake the calories than lose them. Wait till after three weeks out and you will be celebrating the end of treatment.


Gary
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IMRT/Cisplatin X2
SCC, Stage III, Right Tonsil
Treatment began Jan 27, 2003
Treatment ended Mar 20, 2003