Eileen,
Since then my wife has had two additional dilations. Again, as usual, she got violently ill with nausea and vomiting. So as usual after the 7th and 8th dilation we spent three days in the CCC so that she could get hydration and anti-nausea medication. She did not have thrush or any mouth infections.
I have asked the GI doctor performing the dilations why the nausea occurs. I did not really get an answer but he prescribed Tygan as a remedy. Tygan was dispensed in "horse" size pill which she could not swallow. We did try Zofran but it did not seem to help.
Anyway, we though that the nausea could be related to the anesthetics given for the procedure. So we asked the anestisiologist to try something different but the end result was the same. So we still do not know why the nausea occurs.