Hi there. Rotation of antifungals is a fallacy in my opinion, you need to find the one that works for you. What is clever is to "cycle" dosages, especially when you use a strong antifungal like grapefruit seed extract, i.e; go low dose for a few days, high dose for a few and then stop, then repeat. Take GSE for two to three weeks max., then stop for a week or so. Not a good idea to take a product continuously for weeks and months on end. I like people to use "special foods" I've written about in my book Candida Crusher, like cloves, garlic, coconut, etc., as well as have various antifungals.
Once you adopt the right diet, the right lifestyle, and take special foods (like fermented/cultured foods, anti fungals foods, etc) then the whole idea of constantly killing candida with antifungals becomes less important. It is important, don't get me wrong, but it is not the holy grail like some make it out to be, just a small cog wheel in a big machine, that's all.