33 cases of pain due to neural - root type cervical spondylosis were treated by Bitongxiao. with another 31 cases treated by Jingfukang granule as control. The pain scores in both groups before and after the treatment were markedly decreased （all P <0. 01）

so were that of the difference of values between them（P<0. 05）. For the analgesic action between the type of qi -stagnation blood - stasis and the type of channel blocked by wind - cold evil

there was no difference. The content of leucic- eukephalin （LEK） in the plasma of the treatment group after treatment increased dramatically （P<0. 01）. but that in the control group

though tending to increase

showed no significant difference.