A therapeutic agent for spinal canal stenosis is provided, which contains a pyridazinone compound of the formula (I)
wherein R1, R2 and R3 are each independently a hydrogen atom or a lower alkyl, X is a halogen atom, a cyano or a hydrogen atom, Y is a halogen atom, a trifluoromethyl or a hydrogen atom, and A is a C1 - C8 alkylene optionally substituted with a hydroxyl, or its pharmacologically acceptable salt.
本发明提供了一种治疗椎管狭窄的药物,其中含有式(I)的
哒嗪酮化合物
其中 R1、R2 和 R3 各自独立地为氢原子或低级烷基,X 为卤素原子、
氰基或氢原子,Y 为卤素原子、三
氟甲基或氢原子,A 为任选被羟基取代的 C1 - C8 亚烷基或其药理学上可接受的盐。