平喘药作用主要包括抑制气道炎症和缓解气道阻塞。抗炎性平喘药中，糖皮质激素的分子机制和吸入疗法有了新认识；出现了奈多罗米钠、呋塞米等新药。气道扩张药中，发展了具有抗炎作用的长效β２受体激动药；茶碱类的小剂量长疗程受到重视。一些免疫抑制药可用于治疗慢性顽固性哮喘病人。 Antiasthmatic drugs mainly include the inhibition of airway inflammation and relieve airway obstruction. Anti-inflammatory antiasthmatic drugs, glucocorticoid molecular mechanism and inhalation therapy has a new understanding; appeared natamilom sodium, furosemide and other new drugs. In the airway dilatation medicine, long-acting β2 agonist with anti-inflammatory effect has been developed. The long-term treatment with low dose of theophylline has been paid more attention. Some immunosuppressive drugs can be used to treat patients with chronic intractable asthma.