Save your cash, there's a cheaper, more effective treatment. White distilled vinegar. put two drops on the base of your infected toenails in the morning and repeat before going to bed. Vinegar doesn't kill the existing fungi, but it does prevent more from growing....so...you'll need to do this UNINTERRUPTED for about 3 months while the toenail grows out. I tried the perscription approach with bloodtest and all and was completely underwhelmed. Then I tried the vinegar and within 4 weeks I noticed a marked improvement and after 3 months or so, all was gone...not to return since. That was 4 years ago. Go buy a medicin dropper from a local drugstore and some vinegar if you don't have some already.