Chaihu injection generally refers to Chaihu injection, which has the effect of clearing heat and relieving the surface, and can be used to treat fever symptoms caused by influenza, cold, malaria and so on. Chaihu Injection is the name of a proprietary Chinese medicine, which is mainly composed of Chaihu and other ingredients, and is a kind of pungent and cool antidepressant. The usage is intramuscular injection. Allergic symptoms such as cyanosis, itching, and rash may occur, as well as adverse reactions such as palpitations (rapid heartbeat, often accompanied by panic), drop in blood pressure, respiratory distress, chills, and fatigue. In addition, the drug needs to pay attention to the existence of a history of serious adverse reactions, children, allergic to Chai Hu people prohibit this drug, but also need to pay attention to this product is fever-reducing and antidepressant drugs, no fever patients should not use. Patients who are not feeling well are advised to consult a doctor in time to avoid delaying their condition. It is recommended that the use of Chaihu injection should be used under the guidance of a doctor, half an hour after the injection, closely observe their own reaction to the drug, if there is any abnormality, contact the doctor in time.