David

I've had similar issues with insurance over Diflucan. The insurance companies base their restrictions on the assumption that Diflucan is being prescribed for a vaginal infection which does not get a daily dose. Luckily for me, at that time I was getting my prescriptions filled at the hospital pharmacy. The pharmacist knew that your dosage is standard for oral thrush in cancer patients and he called and argued with the insurance company. He had special numbers to call a supervisor since similar issues came up all the time with cancer patients and did get my insurance to pay for it.

Since I'm not going to the hospital daily, when I get thrush, I use Mycelex lozenges (generic name is Clotrimazole 10 mg troches) which dissolve on your tongue and are really effective. Unlike Diflucan which courses through your whole body and can do a number on your kidney and liver, this just hits topically on the thrush on your tongue. You might want to ask your doctor next time.
good luck - I hate it when the thrush comes back
Charm