Any medication to treat toenail fungus has been medically proven to cause major health issues, namely heart attacks. I did a horrible job of taking care of my feet while deployed to Afghanistan and came back with a horrible fungus on my two big toes. I tried all sorts of over the counter stuff and couldn't get rid of it so I spoke to a doctor about getting some medication cause I kept seeing all the commercials. He refused to prescribe me any because of the side effects and admittedly I left pissed off. After reading up about how dangerous they are I'm happy he didn't. Took alot of time, quite a few nail files, and a few different products but I finally got rid of it.