Hi, I'm a homeopath and I come across a lot of thrush in children and adults. The surest way to eradicate it, I've found, is to eliminate [detox] the toxic metals it is there to mop up. When you remove the metals, thrush is removed by the body quite simply. There is a similar case with parasites. Our bodies use these overgrowths to lock away toxic metals. When you use medications to eliminate them you get what's known as 'herxing' and it looks just like metal toxicity symptoms [mercury and aluminium in particular]. When these organisms are killed before the body has eliminated metals, the metals they contained are liberated into the system, causing 'herxing' [herxing is thought to be due to breakdown products of the dying organisms but I am sure in part it is the liberation of metals].
Remove the metals and the body is no longer susceptible to candida and parasites. I've seen it time and again and now I don't treat candida overgrowth or parasites before detoxing metals [homeopathically].
Hope that helps.