I had the same. Dr. prescribed for 3 months (last July through September), and did a liver test every 6 weeks while I was taking it. Now, the toe nails (both big toes) are 1/2 way normal (the tops are nearly 1/4" thick - ick) -- I keep cutting down and trying to get to the normal nail.
My dad wasn't a candidate for oral meds, and he had his nails removed. It was pretty painful, from what he told me.
I didn't get treatment for years, and tried OTC stuff on and off with no results. It might be incredibly vain, but it's pretty exciting to know that this summer I might actually be able to get a pedicure!