Coughs caused by viral colds are mainly suppressed with dextromethorphan, and can be combined with antiviral drugs such as oseltamivir if caused by influenza viruses. For severe coughs caused by colds, cough suppressants can be used. Cough suppressants such as dextromethorphan are usually used to treat cough symptoms, effectively controlling symptoms and improving general condition. In addition, if it is due to influenza virus caused by influenza, can also be combined with antiviral treatment, generally use oseltamivir and other antiviral drugs, to control the virus to continue to replicate, which caused the aggravation of the symptoms, can be fundamentally improve the condition. If the symptoms of the flu are severe, it is recommended to seek medical attention and use medication under the guidance of a doctor to avoid delaying the condition.