Ciclopirox-d11 (sodium) is deuterium labeled Ciclopirox. Ciclopirox (HOE296b) is a synthetic antifungal agent that can be used for superficial mycoses reseaech. Ciclopirox olamine has a very broad spectrum of activity and inhibits dermatophytes, yeasts, molds, and many Gram-positive and Gram-negative species pathogenic[1].