I had radiation treatment about 2 months ago. And I have been having problems (I believe) with Candida for about 3 months off and on. About a mounth ago they gave me an Nystatin which is liquid and you swish around in your mouth. I ran out of that, so they gave me Ketoconazole (Nizoral). That worked very well, but the Candida came back. So they gave me Diflucan. I have been taking it for about 4 days and it does't seem to be helping me yet. So I might have to switch back to Kenoconazole. Does any one know about how long Candidia will keep accurring ?