Commonly used clinical nebulized drugs include adrenal glucocorticoids, β2 agonists and sputum-diluting drugs, as follows: First, glucocorticoids, commonly used nebulized solutions include inhalation budesonide suspension, which is the only FDA glucocorticoid that can be used for pregnant women, mainly to control airway inflammation and can promote the repair of respiratory tract mucosa. Secondly, agonists of β2 receptors, commonly used nebulizer are terbutaline sulfate nebulizer solution and salbutamol sulfate nebulizer inhalation solution, the main effect is to excite the β2 receptors on the bronchial wall to make bronchial dilation. Thirdly, drugs that dilute sputum, commonly used are acetylcysteine solution for inhalation, the main effect is to dilute sputum, which is conducive to the discharge of sputum.