Dry cough without sputum may be caused by physiological factors such as prolonged speech, dry environment, etc. Usually no medication is needed. However, if the cough is caused by cough variant asthma, allergic cough and other diseases, you can use drugs for the cause, such as salbutamol, dextromethorphan and so on. 1. Physiological factors: prolonged speech, dry environment, stimulated by pollen, smoke, cold air and other factors, may appear dry cough without sputum. If the cough is transient, it is normal and no medication is needed. It can be relieved by talking less, drinking more water and keeping the airways moist. 2. Cough variant asthma: Dry cough without sputum is also considered to be due to cough variant asthma, which usually occurs after exposure to irritants such as pollen, insects and mites, and cold air. It is necessary to keep away from allergens in time, and at the same time, you can use drugs such as propacaterol hydrochloride and salbutamol to relax the bronchial tubes and alleviate the symptoms, and you can also give montelukast sodium and loratadine for anti-allergy treatment. 3. Allergic cough: Dry cough without sputum may also be caused by allergic cough. For severe dry cough, dextromethorphan, pentoxyverine and other cough suppressant treatment, as well as loratadine and other anti-allergy drug treatment. There are many reasons for dry cough without sputum, and patients are advised to go to regular hospitals to find out the cause of the disease. The above drugs should be used under the guidance of a physician.