Tolnaftate is an antifungal medication used to treat fungal skin infections such as athlete's foot, jock itch, and ringworm. It is available in several forms, including creams, sprays, and powders. Tolnaftate works by stopping the growth of fungi that cause skin infections. It is generally considered safe and well-tolerated when used as directed. Common side effects include skin irritation, itching, and burning.