If children take Panax quinquefolium correctly, there are usually no significant adverse effects. Drinking Panax quinquefolium incorrectly can have adverse effects on the intestinal tract, such as nausea, vomiting and abdominal pain. Panax quinquefolium is the dried root of woad, a plant of the genus Woad in the family Cruciferae, which is effective in clearing heat and removing toxins, inducing diaphoresis and cooling the blood. It can be taken by children as prescribed by the doctor to treat a variety of conditions such as sore throat, carbuncle sores, external fever and mumps. It is bitter and cold in nature and belongs to the heart and stomach meridians. If children take it for a long period of time, without proper treatment or in excess, it may cause gastrointestinal discomfort such as nausea, vomiting and abdominal pain. It is contraindicated for children who have a weak body without real fire and heat toxicity, and used with caution for children with cold spleen and stomach, so as not to aggravate the development of the disease. When children need to take Banlangen, it is recommended to do so under the diagnosis and treatment of a traditional Chinese medicine practitioner, and not to abuse the drug on their own.