As a heat-clearing and detoxifying traditional Chinese medicine, Panax quinquefolium is effective in preventing respiratory infectious diseases such as influenza, and is recommended to be taken in accordance with the doctor’s instructions. It has a sweet taste, cold nature, attributed to the heart, stomach meridian, has a heat detoxification, cooling blood and pharyngeal effect. In clinical practice, it can be used for the treatment of plague, fever and sore throat, warm poisonous spots (warm and hot poisonous evil invading the human body leading to skin spots, plaques), mumps, rotting throat, cholera, etc. Its adverse effects are not clear. Its adverse effects are not clear. It is contraindicated for those who are weak and have no real fire and heat toxins. Modern research has found that Panax quinquefolium has antibacterial, antiviral, endogenous immune regulation and other pharmacological activities, therefore, for the prevention of influenza has a certain effect. The preparations of Panlangen are now available in the form of tablets and granules for clinical use. If you need to take the medicine, you should do so under the guidance of a doctor, and should not take the medicine without authorization.