A method for delivering an antifungal agent to a nail surface or a surface of a body excluding an oral cavity includes the step of adding the antifungal agent and a penetration enhancer containing composition sequentially or simultaneously to the nail surface or the surface of the body to form a further composition. Penetration through the nail or the surface of the body of the antifungal agent is enhanced by the penetration enhancer, and the penetration enhancer is a metal chlorite salt.
