I have had great success with Lufenuron.
I know there are many that wouldn't touch it but it is used a lot in Europe. It is NOT good for the liver but I had no luck with anything else and I felt I had to do something. My tongue had a white coat for more than 20 years.
I have been taking it for over a year and other than a severe Herx reaction when I first started taking it I have had no problems. Start slow. The recommended dosage is 9 grams. I took 400 mg the first time and the Herx was so bad I was in bed for days. It took 3 months to work up to 9 grams.
It hasn't helped the toe nail fungus much but the gut fungus is under control.