用自身对照开放性试验方法，应用苯那普利治疗４８例轻中度原发性高血压患者，有效率为９３．４％，心率无明显变化，不良反应轻。治疗原发性高血压有其独到优势，有着良好的应用前景。 48 cases of mild to moderate essential hypertension were treated with benazepril. The effective rate was 93.4%. There was no significant change in heart rate with mild adverse reaction. Treatment of essential hypertension has its unique advantages, has a good prospect.