生杜仲、杜仲炭和砂烫杜仲均能使兔、狗的血压明显下降,并可减缓大白鼠离体子宫的自发活动、对抗脑垂体后叶素对子宫的作用。但经炮制后的炭和砂烫杜仲在降压和对子宫抑制两方面较生者强,而炭和砂烫杜仲在药理实验的作用强度基本一致,因此认为可以用方法简便、效率又高的砂烫杜仲炮制 Eucommia ulmoides Oliv., Eucommia ulmoides carbon, and sand-burned Eucommia ulmoides can significantly reduce the blood pressure of rabbits and dogs, and can slow the spontaneous activity of isolated uterus of rats and counteract the effect of pituitrin on the uterus. However, the processed charcoal and the sand-burned eucommia ulmoides are stronger in the antihypertensive and uterine-inhibitory effects, while the charcoal and sand-burning eucommia ulmoides have similar strengths in the pharmacological experiments, so it is considered that the methods can be used simply and efficiently. Sand Burning Yezhong Processing