From my experience, candida and yeast will build resistance to some antifungals. Because of that you should be careful with the antifungal that you use.
According to Sean Brookwood, Coconut Oil and CFort10 are two antifungals which candida does not have resistance to. The ingredient in CFort10, 10-Undecenoic Acid is highly recommended by many doctors, and it's a VERY powerful antifungal.