Methods Hot-plate method for mice and tail flick method for rats were used to check pain threshold after administration with CNT,aspirin and araban respectively.

• 方法采用小鼠热板法和大鼠尾尖压痛法分别观察灌服尼尔骨康片、阿斯匹林及等容量阿拉伯胶前后痛阈潜伏期的变化;