I know it's not popular to talk about mainstream medicine on this forum, but I have to report my results with Itracanazole (Sporanox) and nail fungus.... It worked.
I was also very concerned about liver toxicity, but there has been progress in the last few years, and the dosage has been refined from 3 months non-stop (yikes!), to three months, 7 days on, 21 days off. MUCH easier on the liver! Still, alcohol is mildly contraindicated.
I had a fungus in my right big toe for over ten years and it is gone now. Just to be sure, I did a parasite/colon cleanse, (Natural Factors 7 day), and ate only whole foods and no coffee/alcohol for two weeks last summer. Felt fantastic - really ecstatic some days.