One percent Ciclcpirox soluticn, a new topical antimycotic agent, was used in a double-blind controlled trial in 105 dermatcmycosis patients. Twelve of the patients were lost to follow-up. Of the remaining ninety-three patients, forty-four were treated with the active drug, forty-nine with a placebo. The cure rate amongst those using ciclopirox was significantly superior to that of the placebo. The drug was effective against Trichophyton rubnim, T. violaceum, T. mentagrophytes and Malassezia furfur.