Dermatomycotic diseases which are one of the mostly seen diseases in pets and also which became more and more important because of their zoonotic influences are to be one of the cases that the cure is delayed because of their long term asking and expensive therapy and that's why new researchs are developing. Terbinafin (Lamisil ® ) which seems to be more effective regarding to the other drugs (griseofulvin, ketoconazole, fluconazole and ıtraconazole) is more oftenly used in veterinary medicine. This article aims to give further information about terbinafin's clinical effects and use.