Cough up a heap of yellow pus sputum, possible diseases for purulent bronchitis, pneumonia, lung abscess, bronchiectasis, etc., in the etiological treatment at the same time, can be given symptomatic nebulization to promote the discharge of sputum, nebulized drugs including gentamicin, aminobromine hydrochloride, chymotrypsin, etc.. Gentamicin: It can be used for pulmonary infections caused by Klebsiella and Pseudomonas aeruginosa. This drug and other aminoglycosides allergy is prohibited; renal function abnormalities with caution. Adverse reactions include urticaria, rash, nausea, vomiting, hemolytic anemia, dizziness, tinnitus and so on. Precautions: Prohibit the combination with other aminoglycosaminoglycosides, neuromuscular blocking drugs, cefotiophene and cefazolin. 2. Ambroxol Hydrochloride: It is suitable for expectorant treatment of acute and chronic respiratory tract inflammation with abnormal sputum secretion, such as purulent bronchitis and bronchiectasis. It is contraindicated in early pregnancy, allergic to this drug and to bromhexine; use with caution in malignant cilia syndrome, glaucoma, and allergy. Adverse reactions include dizziness, headache; nausea, vomiting, dyspepsia, etc.; dyspnea, dryness of the mouth and airways, etc.; difficulty in urination. Note: Avoid taking with atropine-type drugs and strong cough suppressants. 3. Chymotrypsin: It can be used in chronic bronchitis, lung abscess, bronchial dilatation, etc. It can make purulent sputum liquefied and easily discharged. Serious liver disease, coagulation abnormalities and other patients are strictly prohibited. Adverse reactions include fever, excessive sweating, abnormal coagulation function and so on. The above drugs are recommended to be used under the guidance of a doctor, not blindly self-medication. To avoid adverse reactions.