肼酯哒嗪与肼酞嗪(肼苯哒嗪)或双肼酞嗪不同,它具有一个保护性肼基,是外周小动脉血管扩张剂。口服本品7.5～30mg,可使原发性高血压病人的收缩压及舒张压分别下降20％,25％,15mg 最宜。肼酯哒嗪通过松弛动脉平滑肌导致降低外周血管阻力而降压,单剂量给药后,病人的外周血管阻力下降20％～30％。该药可引起反射性的持续性心动过速,但在长期治疗中该不良反应趋向减弱。老年病人在长期治疗中增加约16％的心输出 Hydrazinium ester pyridazine and hydralazine (hydralazine) or hydralazine different, it has a protective hydrazino, is a peripheral arteriolar vasodilator. Oral 7.5 ~ 30mg of this product can make patients with essential hypertension systolic and diastolic blood pressure were decreased by 20%, 25%, 15mg the most appropriate. Hydrazapridyl pyridazine reduces blood pressure by relaxing the arterial smooth muscle and lowering the peripheral vascular resistance of patients after a single dose, the patient’s peripheral vascular resistance decreased by 20% to 30%. The drug can cause reflex persistent tachycardia, but the long-term treatment of the adverse reactions tend to be weakened. Elderly patients increase their cardiac output by about 16% over the long term treatment