Nebulization of pneumonia in the elderly commonly used inhaled hormones, β2 agonists, M2 receptor antagonists, and acetylcysteine. 1. Hormones: common drugs include budesonide, beclomethasone, etc., which have a faster onset of action. 2. β2 agonists: common drugs include salbutamol, terbutaline, etc., which can dilate the bronchial tubes and relieve the symptoms of cough and shortness of breath. 3. M2 receptor antagonists: common drugs include ipratropium bromide, which is stronger and lasts longer. 4. Acetylcysteine: it can dilute sputum and promote the discharge of sputum. Elderly people with pneumonia nebulization need to be strictly under the guidance of the doctor, do not blindly use drugs.