Cough is a relatively common symptom in life, and depending on the situation that caused the cough, the drugs used are also different. Mild coughs generally do not need to be treated with drugs and can be relieved naturally by drinking more water, but more serious coughs, which affect daily life and sleep, need cough medicines to help treat them: I. Western medicines: 1. Codeine: a central nervous system depressant with a relatively strong and rapid cough suppressant effect, suitable for severe dry or irritating coughs caused by various reasons, especially severe dry coughs accompanied by chest pain, capable of relieving moderate 2. Dextromethorphan: a central cough suppressant, with no drowsiness effect in daytime tablets and antihistamine effect in nighttime tablets, and has a strong sedative effect. It is used for the treatment of cough caused by cold, mostly in the treatment of cough caused by upper respiratory tract infection, acute or chronic bronchitis, bronchial asthma, bronchiectasis, pneumonia, tuberculosis, etc.; 3. Forcodine: similar to dextromethorphan, with cough suppressant and analgesic effects. Oral effect is better than codeine, toxicity and addiction is smaller than codeine, safety is greater, suitable for relieving severe dry cough and moderate pain; 4. Pentoxifylline: the strength of the cough suppressant effect is not as high as codeine, the treatment has the symptoms of dry cough without sputum, has the effect of weakening the cough reflex and relaxing the bronchial smooth muscle, mostly seen in acute bronchitis, chronic bronchitis and cough caused by various reasons. Chinese patent medicines: 1. Ginkgo cough syrup: treats cough with nasal discomfort, clear nasal discharge and thin white tongue coating, and has the effect of reducing phlegm and relieving cough; 2. Luo Han Guo cough granules: can treat cough and phlegm that cannot be coughed out, sore throat, with body heat and yellow nasal discharge, and has the effects of cough expectorant, antibacterial and antioxidant; 3. Antelope Qing Lung Pill: treats body heat and dizziness, cough with phlegm, sore throat, dry mouth and dry tongue. It has the functions of clearing heat and detoxifying, clearing lung and throat, stopping cough and expectorant; 4. It is also used for the prevention and treatment of radioactive pneumonia, radioactive esophagitis, etc. It has the effect of clearing heat and regulating phlegm, moistening the lung and relieving cough. There are many other types of cough medicines, but it should be noted that they should be used under the guidance of a doctor. In addition, coughs caused by asthma, allergies and other diseases generally do not need to be treated with cough suppressants alone, as the effect is often not very good and treatment of the primary cause is the key.