Rosie,
John has had thrush since the middle of his radiation treatment ( early or mid July). We have battled it with everything. We started with Nystatin. It got worse and he took diflucan. It never completely went away and we started a third med a lozenger which dissolved in his mouth. I can't remember the name but I will get it. It is now January and it is almost gone. I am sure it went down his throat when it was at its worst. The diflucan was the most powerful drug we used. Our dentist said that it was related to the lack of saliva as well as the radiation and would begin to resolve when John's saliva became more normal. We tried a home cure that seemed to help but run it by your doctor before doing it. John would add just a teaspoon of vinegar (white) to a cup of water and swish it through his mouth. Thrush does not like an acid base. He did not swallow this or get it to the back of his throat.
The nausea that John had was controlled by zofran. He was nausea free about one month after his last radiation.
Meredith