The invention relates to a method of treating pain comprising the separate, sequential or simultaneous administration to an individual in need of such treatment of a therapeutically effective amount of a compound according to formula (I) or pharmaceutically acceptable salts thereof, wherein Y is -Cl or -CF3； and of a therapeutically effective amount of gabapentin or pregabalin, or a pharmaceutically acceptable salt thereof.本發明係關於一種治療疼痛之方法，包括分開、依序或同時投與給有此治療需要之個體治療上有效量之式(I)化合物或其醫藥上可接受之鹽，其中Y為-Cl或-CF3；及治療上有效量之加巴噴丁(gabapentin)或普瑞巴林(pregabalin)，或其醫藥上可接受之鹽。
