They discovered that usually one pill Diflucan will do the treat for a yeast infection. Sometimes with Monistat also. Taking antibiotics always gives me a yeast infection. But this time the yeast infection came on its own and I don't know know why. I just got over a viral infection and cold and am thinking a suppressed immune system could have caused it. I don't know. But after antibiotics I also get a yeast infection and will sometimes need two Difulcan and Monistat cream. Also keep dry down there and take a probiotic and eat yogurt. That is my advice.