Banlangen can cure wind-heat cold. Panax quinquefolium is a kind of traditional Chinese medicine with a bitter taste and cold nature, which belongs to the heart and stomach meridians. It is effective in clearing away heat and detoxification (removing heat and toxicity from the body), cooling the blood, in addition to benefiting the pharynx. It has the function of treating external fever, sore throat, the beginning of warm disease, mumps, carbuncle and sores. From the above, it can be seen that the root can be used to treat wind-heat colds. The contraindications of Panax quinquefolium are not clear. It should be noted that it should not be taken by those who have a weak body without actual fire and heat poisoning; and should be used with caution by those who have a weak spleen and stomach (spleen and stomach weak and cold). If there is a need for medication, it should be used under the guidance of a doctor to identify the evidence, and should not be used blindly on its own to avoid adverse consequences.