Treatment of bronchial asthma by nebulized inhalation is a very important therapeutic measure. drugs used in nebulization can be divided into several categories: 1. mainly beta2 agonists, such as salbutamol, terbutaline, salmeterol, fomoterol, procaterol and other nebulized solutions. 2. anticholinergic solutions, such as ipratropium bromide nebulized inhaler. 3. glucocorticoids, such as budesonide suspension for inhalation. 4. home-provided The spray for emergency, such as Bicodone, Pulmicort, Salmeterol Ticapone, etc., for self-use. In addition, when the sputum is relatively viscous, you can also choose to use chymotrypsin, aminoglutethimide and other nebulizing solutions for nebulized inhalation jointly.