Lamisil Cream 1% 15g contains Terbinafine. Terbinafine treats a variety of fungal skin infections such as ringworm, athlete’s foot, and jock itch. Also, this medication treats a skin condition known as pityriasis. This is a fungal infection that causes a lightening or darkening of the skin of the neck, chest, arms, or legs. Terbinafine is an antifungal that works by preventing the growth of fungus.