它对神经系统产生作用，从而降低血压。
他们也用了药物来引起昏迷，昏迷降低了大脑中的新陈代谢和血流速度，从而降低血压。
They also used drugs to induce a coma, which slows the metabolism and blood flow in the brain, decreasing pressure.
较大剂量时，也能舒张外周阻力血管和心肌阻力血管从而降低血压，还可以间接地增强心肌收缩力。
If large doses are used, they can diastole outside resistant blood vessels and myocardial resistant vessels and they can reduce blood pressure and also indirectly enhance myocardial systole.
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