Ciclopirox is an antifungal medication. Ciclopirox topical prevents fungus from growing. Ciclopirox topical (for the skin) cream, gel, and lotion formulations are used to treat skin infections such as athlete's foot, jock itch, ringworm, and yeast infections. Ciclopirox shampoo is used to treat seborrheic dermatitis (inflammatory skin condition) of the scalp. Ciclopirox nail lacquer is used to treat fungal infections of the toenails and fingernails. Ciclopirox topical may also be used for purposes not listed in this medication guide.