β_2受体激动剂(β_2A)是目前常用的支气管舒张剂,其吸入剂型因平喘起效快,作用可靠,全身副作用少而受到临床重视,甚至有人长年使用。然而,近年来的资料显示,长期的特别是大剂量用药对哮喘病人不利,甚至死亡率增加。为合理的使用β_2A.本文讨论β_2A气雾剂吸入用药对呼吸系统的副面效应和用药原则。 β_2 receptor agonist (β_2A) is the most commonly used bronchodilator. Its inhalation dosage forms are clinically important due to its rapid onset of asthma, reliable action, few systemic side effects and even long-term use. However, recent data show that long-term, especially high-dose, adverse effects on asthma patients and even increased mortality. In order to reasonably use β_2A, this paper discusses the side effects and medication principles of β_2A aerosol inhalation on respiratory system.