Whether Chinese medicine has toxic side effects or not, and how to use it safely, are questions that must be understood before using Chinese medicine. I often hear from the masses: Chinese medicine has no side effects when eaten. Drug advertisements are also promoting: Chinese medicine comes from nature, has no toxic side effects and is safe to use. On the basis of these understandings, it is common for doctors to prescribe more Chinese medicine doses at will, and for patients to take Chinese medicine on their own without paying attention to the dosage. For example, the use of 60g of mucuna pruriens per dose to treat kidney stones resulted in acute renal failure, and the use of sanguinaria root increased to more than 30g and resulted in poisoning. From the reports, the toxic side effects of Chinese medicine can be divided into acute poisoning and chronic poisoning. Acute poisoning is the appearance of adverse reactions within a short period of time after taking Chinese medicine. For example, if the lung is moistened and the cough is relieved, 20% to 30% of patients will have different degrees of throat dryness, chest tightness and abdominal pain at regular dosage, and large dosage can cause respiratory center paralysis and even death. Chronic poisoning refers to the chronic damage that occurs when a drug is taken for a long period of time and is not easily detectable. For example, when Shou Wu is taken for a long time, degenerative changes in liver cells can occur in experimental animals. Centipede is also damaging to the liver when taken for a long time. Clinicians should be familiar with these herbal medicines. Adverse reactions to Chinese medicine are often caused by the following reasons: 1. Excessive dosage ① Hundreds of commonly used Chinese medicines that are not labeled as toxic in Chinese medicine books are safe under regular dosage, but if the dosage is increased arbitrarily, adverse reactions will occur. For example, high doses of Inoceramus can cause ECG abnormalities, and there are reports of cardiac rhythm disorders and A-Syndrome caused by taking 60g of Inoceramus at a time. Doklam can cause rapid breathing, vomiting, arrhythmia, hallucinations, generalized tonic spasms until death by general paralysis when given in high doses. High doses of Yuanhu can cause respiratory depression, cardiac dysfunction, and even death by shock. Neem can cause vomiting, diarrhea, dizziness, general numbness, decreased blood pressure, cardiac arrhythmia, and even respiratory and circulatory failure when taken in large doses. This type of medicine is often seen to be arbitrarily increased in dosage because of the good safety of the regular dosage. ② Chinese medicine books have indicated that toxic, but still be used in increased doses. For example: the conventional dosage of whole scorpion is 4.5g, the amount of poisoning is 30-60g. Guangzhou folk use this to treat tumors, was increased to 60-100g per day, boiling soup for internal use, the emergence of acute and chronic toxic side effects are not recognized by the public. Chinese medicines that have been labeled as toxic must not be overdosed. 2. Allergic reactions Many commonly used Chinese herbal medicines have reported allergies, such as dandelion, andrographis …… patients have allergic reactions, doctors should be able to consider that it is a Chinese medicine allergy and should avoid using the drug again. And can not be without this knowledge. 3, there is a mistake in the selection of Chinese medicine species selection is also a factor that leads to adverse reactions. For example, the green mulberry adverse reactions are more, the alias of mulberry is also green mulberry, and green mulberry mixed with more serious adverse reactions are likely to occur. The varieties of goldenseal produced around the different, causing adverse reactions reported also vary greatly. Five plus bark conventional use is safer, some areas use northern five plus bark (red willow root bark) as five plus bark use, northern five plus bark is more toxic, resulting in more reports of poisoning, there are reports of five plus bark wine with northern five plus bark as raw material has caused death by poisoning. Chinese medicine is toxic, from the nature of improper use of Chinese medicine also has toxic side effects, can also cause death, this aspect of blood lessons have been a lot. Inappropriate use of drugs is also the fault of the doctor. First of all, clinicians should be familiar with the properties and adverse effects of each herbal medicine. In addition, the knowledge of Chinese medicine should be widely publicized to the public as common sense to improve the quality of all people and correct their understanding of Chinese medicine so that they can also use it correctly.