Banlangen is not an antiviral drug, but pharmacological studies have found that it has an antiviral effect, and should be used reasonably under the guidance of a doctor. Antiviral drugs are a kind of drugs with antiviral effect in the category of western medicine, and the common pathogens that cause disease in human body are bacteria, virus, etc. Antiviral drugs are the drugs that have therapeutic effect on viral infections, such as ribavirin tablets, acyclovir tablets, valganciclovir hydrochloride tablets, etc. Antiviral drugs belong to Chinese herbal medicine, and there is no definition of antiviral in Chinese herbal medicine. Panax quinquefolium belongs to Chinese herbal medicine, and there is no definition of antiviral drugs in Chinese herbal medicine, so Panax quinquefolium does not belong to antiviral drugs. However, pharmacological studies have shown that Panax quinquefolium has antiviral effects. The use of Panax quinquefolium for the treatment of diseases should be under the guidance of a doctor and according to the theory of Chinese medicine.