I had blackening toenails for years. They started getting black and thick, starting from pinky and finally covered all toenails on my left foot. I tried creams, all kinds - nothing worked. Lasted for at least 5 years. I hated looking at my toes. Finally, I went to Foot and Ankle clinic, they prescribed Terbinafine, I took it orally for 3 months, and all my nails now look better than ever! All fungus is gone, I feel so happy! It took 6 months to cure it completely, but it worked like a miracle.