Hey, Jane; I'm glad to have you here.
I’m thinking Nyastatin may work, if you used it in a conjunction with other form of detox, including low sugar, low carb diet, but only once in short burst. Otherwise, I'm afraid yeast will adapt to it, and you will be on the loosing battle; going back to where you'd started. However, with one less weapon to use for the round two (like in video games.) I believe yeast have to be treated in stages, with different ‘weapons.’
I once saw a book (pardon me, I don't remember the title) that spoke of how 'braziers' were responsible for breast cancer. I did not read the book, but the dots are connecting in my head that yeast causes cancer, along with many other disorders, disease and mysterious ‘syndromes.’ If you are wearing a bra all the time, mostly made of synthetic material, like nylon, I bet it will be cozy for the yeast to grow there, like a warm cradle. Once yeast is in your blood stream, it can grow anywhere in your body, just as any fungus will grow when the condition is right.
Both of my children now 6 and 4 had seizures before. My DD's was very mild, but my DS had few in a same day. It was both induced from high temp. I did not realize this till my DS had his, and after I was calm to think about this. They both had high temp: A natural course of body trying to rid of bacteria/virus. They all happened in March: Where we have lots of rain and things starting to grow. And, we were living in our old house at the time, with humidifier in our bed room to keep our room warm and comfortable (co-sleeper.) All the condition that the yeast will prefer.
I feel most people who are fighting to control yeast and yeast related problems by only looking at a part of the picture, but there is no silver bullet to concur the Yeasty Beastie.