Clinical antiviral drugs used in viral respiratory diseases are mainly: M2 ion channel blockers, neuraminidase inhibitors, broad-spectrum antiviral drugs and so on. 1.M2 ion channel blockers: amantadine, amantadine ethylamine. They can inhibit the ion channel activity of viral M2 protein and exert antiviral effect. M2 protein exists in influenza A virus, so it only has inhibitory effect on influenza A virus, amantadine and amantadine are mainly used for prevention and treatment of influenza A virus. 2. Neuraminidase inhibitors: Oseltamivir, Zanamivir, Paramivir. Inhibit the activity of neuraminidase on the surface of the virus, prevent the virus from invading into human cells, prevent the replication of virus particles in human cells, and have antiviral effects on both influenza A and B. 3. Broad-spectrum antiviral drugs: Abidol, ribavirin. It can inhibit RNA and DNA viruses, and has a weaker effect on influenza viruses, and is mainly used for pneumonia and bronchitis caused by respiratory syncytial virus. There are also antiviral proprietary Chinese medicines: antiviral granules, antiviral oral solution, etc., of which the main ingredient is Banlangen, which has antiviral effects. If there are symptoms such as fever, cough, headache, sore throat, etc., and respiratory viral infection is suspected, it is necessary to go to the hospital for further consultation and treatment. The above drugs need to be taken under the guidance of a physician to avoid adverse reactions.