Heat toxin is one of the commonly used clinical drugs, with the effect of clearing heat and detoxification, and its common side effects are as follows: first, allergic reactions, such as rash, itchy skin, redness all over the body, and in severe cases, anaphylactic shock and low blood pressure can occur, which requires emergency resuscitation. Second, abdominal symptoms, nausea, vomiting, diarrhea, loss of appetite and so on. Third, some patients may also experience adverse reactions such as dizziness, chest tightness, shortness of breath, and dry mouth. When the above adverse reactions occur after the application of pyrexia, the changes in condition should be closely observed and the drug should be discontinued if necessary.