Dry cough is a cough without sputum or with a small amount of sputum, and under the guidance of a doctor, oral cough suppressants can have a good therapeutic effect on this symptom. 1. Central cough suppressants: dextromethorphan, pentoxifylline, dextromethorphan, codeine, forcodine, etc.; among them, dextromethorphan is currently the most widely used clinically; 2. Peripheral cough suppressants: noscapine, benadryl, morgestan, benzonatate etc. The role of cough suppressants is symptomatic treatment, but it is also necessary to treat the primary cause of dry cough in order to treat dry cough at the root. For symptoms such as fever and weakness, antiviral drugs such as oseltamivir can be applied, or oral treatment with fever-clearing and detoxifying herbal medicines; if bacterial infection occurs, cephalosporin antibiotics can be applied; 2, chronic pharyngitis: the main symptom of chronic pharyngitis is an irritating cough with foreign body sensation in the throat; Chinese herbal medicines such as white chrysanthemum, fat sea, licorice, etc. can be used for drinking; usually pay attention to oral hygiene, avoid smoking, alcohol, spicy 3. Gastroesophageal reflux disease: Gastroesophageal reflux of gastric juice stimulates the throat and produces a dry cough; acid suppressants and gastrodynamic drugs, such as cimetidine, omeprazole, domperidone and gastroflucan, can be taken to relieve or control gastroesophageal reflux and reduce cough symptoms; 4. Cough variant asthma: cough variant asthma is mainly irritating dry cough at night or in the early morning; salbutamol can be inhaled. Oral beta2 agonists can also be taken.