Introduction: Although the side effects are small, but the serving method and dosage must be strictly in accordance with the drug instructions on the package, blind abuse can not prevent disease health effects. Experts warned that the root of the plate on the prevention and treatment of wind and fever colds and so on does have a certain role, but for wind and cold and other types of colds are not necessarily suitable. People in a healthy state of taking too much bluegrass, will hurt the spleen and stomach. Very few people who have a history of allergy should not take it easily. As for feverish patients with severe cold symptoms, they must go to the hospital as soon as possible. It is the rhizome part of the 2-year-old plant Isatis woad in the family Cruciferae, whose leaves are also known as dasheen leaves, and is also a purgative and antidote to fever. It contains many kinds of amino acids, glutathiol, indigo, indigo red and other medicinal ingredients, which have the effect of clearing heat and detoxifying, cooling blood and dissolving spots, and have good preventive and therapeutic effects on many bacterial and viral diseases such as influenza, flu, mumps, leptospirosis, pneumonia, hepatitis and so on. Pharmacologically speaking, the toxic side effects of Panax not only are minimal, but also are easily mistaken as non-toxic because it is an “antidote” medicine. However, if used in large doses for a long time, it can cause accumulation of poisoning when the detoxification capacity of the liver decreases. Damage to the digestive and hematopoietic systems, such as upper gastrointestinal bleeding and leukopenia, may occur. This condition is more common in pediatric patients because of their imperfect liver function, insufficient amount of detoxifying enzymes, and poor dosing. When toxic side effects occur, the drug should be stopped immediately and sent to hospital for treatment. Secondly, those who are allergic to Banlangen should avoid using it. Most allergic reactions are caused by Panax notoginseng injection, manifested as dizziness, shortness of breath, vomiting, panic, skin rash, sometimes for the whole body erythema multiforme type drug rash, serious cases of blood pressure drop and anaphylactic shock, resuscitation is not timely will be life-threatening. Once again, Banlangen is not a panacea, not to mention a cure for all diseases. It is a cold product from the nature of the drug, so it is used in the treatment of actual heat, for the elderly and weak, the spleen and stomach cold, long-term use of a large number of people, it will make its body further decline, but also can appear light mouth, fatigue and other symptoms.