The percutaneous absorption of a new antifungal agent, amorolfine, has been measured through both skin and nail using an in vitro technique. Application of a 5% concentration in either an ethanol or methylene chloride lacquer resulted in permeation rates through nail in the range of 20-100 ng/cm2/h and somewhat higher through skin. Absorption was greater from the methylene chloride lacquer than the ethanol lacquer.