本文报告用离体兔颈上神经节法比较氯甲左箭毒与右旋筒箭毒碱阻断神经节传递的效价,前者为后者的48.68％,用大鼠膈神经膈肌法比较其肌松效价为51.80％,因此两药对离体颈上神经节和膈神经膈肌的阻断效力之比甚为接近。对氯甲左箭毒的肌松作用类型作了分析,认为此药与右旋筒箭毒碱一样,均属非去极化型肌松药。由于氯甲左箭毒在我国药源丰富,肌松作用可靠,有可能在临床上代替右旋筒箭毒碱作为肌肉松弛药。 In this paper, we report that the former is 48.68% of the latter, compared with that of the left cervical ganglion in vitro. Muscle relaxation tweezers was 51.80%, so the two drugs on the isolated cervical ganglion and phrenic nerve diaphragm blocking effect is very close to the ratio. Analysis of the type of muscle relaxation role of the chlorine arrow left arrow poison, that the drug and right-tuberculin, are non-depolarizing muscle relaxants. Because of the chlorine left arrow poisoned in our country rich source of medicine, muscle relaxant effect, it is possible to clinically replace right-tubule as a muscle relaxant.