Among the respiratory diseases, the most common are inflammatory reactions of the respiratory system, including upper respiratory tract infections, bronchitis, pneumonia, bronchial asthma, acute bronchitis, cough variant asthma, and pneumonia. The common manifestation of these diseases can be coughing, coughing up sputum, and even accompanied by symptoms of dyspnea. At this time, the choice of cough and phlegm medication is based on the different etiologies and accompanying clinical symptoms. For simple dry cough, cough suppressants such as dexamethasone syrup, compound forcodine oral solution, cough capsules, compound licorice tablets, etc. can be used. For cough with large amounts of phlegm, cough suppressants and phlegm removers such as carboxymethystane oral solution, aminoglutethimide syrup, cough granules for clearing lungs and resolving phlegm, honey-refined Chuanbei loquat paste, snake bile and Chuanbei liquid, snake bile and Chenpi san, etc., myrtle oil, etc. can be used. For asthma and shortness of breath For cough with wheezing and shortness of breath, you can choose compound fenagan syrup, compound methoxyphenamine capsule, aminoglutethimide oral solution, Bolicamni tablets, or even short-term use of glucocorticoids, such as dexamethasone tablets, methylprednisone tablets and other drugs. While taking cough medicine, you should drink more warm boiled water to help dilute the phlegm, facilitate its discharge, reduce the symptoms and facilitate the recovery of the disease.