A human antifungal drug used to treat various dermatophyte infections. Can be used for ringworm infections in the skin. In veterinary species, griseofulvin is approved for use in dogs and cats to treat dermatophytic fungal infections of the skin, hair, claws, and to treat ringworm (caused by T.equinum and M. gypseum) in horses. It has also been used in laboratory animals and ruminants for the same indications.