The present invention relates to the use of substituted dihydroimidazolones, particularly [1-(4-chlorophenyl)-4-(4-morpholinyl)-2,5-dihydro-1H-imidazol-2-one] (AWD 131-138) or a physiologically acceptable salt thereof for the treatment of epilepsy in dogs.本發明係關於經取代之二氫咪唑酮類,特別是[1-(4-氯苯基)-4-(4-嗎福啉基)-2,5-二氫-1H-咪唑-2-酮](AWD 131-138)或其一種生理上可接受之鹽類在處理狗內癲癎上之用途。