研究表明慢性哮喘的儿童和成人口服β-受体兴奋剂对改善肺功能和控制哮喘症状有很高疗效。为获得同样程度的支气管扩张作用经吸入途径给药所需剂量比口服少,且吸入给药副作用的发生率亦比口服低。近10年来临床常用3种选择性作胃于β_2受体的口服药物,包括硫酸间羟异丙肾上腺素、硫酸间羟舒喘 Studies have shown that oral administration of beta-agonists in children and adults with chronic asthma is highly effective in improving lung function and controlling asthma symptoms. In order to obtain the same degree of bronchiectasis, the dosage required for administration by inhalation route is less than that for oral administration, and the incidence of inhalation administration side effects is also lower than that for oral administration. In the recent 10 years, 3 kinds of oral drugs commonly used as β 2 receptor have been selectively used clinically, including isoproterenol sulfate,