喘息是指由于呼吸道阻塞或狭窄,通气障碍而引起的呼吸困难。在我国喘息症状常见于支气管哮喘和喘息型慢性支气管炎。两病在发病学上不同,对药物的反应亦异。广义说来,凡能平定喘息症状的药物均称为平喘药。然而长期以来,人们把平喘药与支气管扩张药简单地等同起来,其实后者虽对多数类型的喘息有一定的即时疗效,但很少涉及病因,疗效亦不巩 Breathing refers to dyspnea due to airway obstruction or stenosis, ventilation disorders. In China, wheezing symptoms are common in bronchial asthma and wheezing chronic bronchitis. Both diseases are morbidly different and the response to the drug is also different. Broadly speaking, any drugs that help calm wheezing are called antiasthmatics. For a long time, however, people simply equated the antiasthmatic drugs with bronchodilators. In fact, although the latter has some immediate curative effect on most types of wheezing, it rarely involves etiology and has no therapeutic effect