Lamisil, Terbinafine is an antifungal medication widely used to treat fungal infections of the skin, hair, and nails, including athlete's foot, jock itch, and ringworm. It works by inhibiting the enzyme squalene epoxidase, which is crucial for the synthesis of ergosterol, a key component of fungal cell membranes. By disrupting this process, terbinafine causes fungal cell death and helps to clear..