A dry cough is a cough that produces no phlegm or a small amount of white mucus phlegm. There are many causes of dry cough, so the specific use of “what medicine” varies. The general principle is to identify the primary cause and then give specific treatment according to the primary cause. The general principle of treatment for eosinophilic bronchitis, cough variant asthma, and allergic cough is anti-allergy, such as loratadine, to relieve airway inflammation, and the main treatment is inhaled hormone therapy. 2. Gastroesophageal reflux cough requires proton pump inhibitors to suppress gastric acid secretion, such as omeprazole and eprazole, which are prescription drugs and need to be seen by a doctor before they can be used. 3.Laryngeal cancer requires anti-cancer treatment combined with local radiotherapy. 4.The three cases of tracheobronchial bifurcation with pressure irritation, tumor of trachea or bronchus, and foreign body in trachea or bronchus need bronchoscopy and interventional treatment. 5, acute laryngitis need to be given to clear the throat treatment, you can use the fat sea to drink water. The general principle of treatment is the need for specific analysis of the specific cause, not only to deal with the original disease, the symptoms can be relieved.