Chaihu Injection is effective in clearing heat and relieving symptoms. It is used to treat fever caused by cold, influenza and malaria. Chaihu Injection, Chinese patent medicine name. It is composed of Chaihu. The pharmacological effects of Chaihu Injection are hepatoprotective, antipyretic, anti-inflammatory, and enhancement of immune function (can promote the formation of antibodies and enhance the inhibition of leukocyte movement). Each injection contains 2 ml. It is usually used for intramuscular injection. Adverse reactions include allergic reactions (rash, itching), systemic reactions (chills, chills, fever, etc.), respiratory system (breath-holding, shortness of breath, etc.), cardiovascular system (palpitation, drop in blood pressure, etc.), neuropsychiatric system (dizziness, headache, blurred consciousness, etc.), digestive system (dry mouth, nausea, vomiting, abdominal pain, etc.). It is contraindicated in those who are allergic to this product or preparations containing Chaihu and excipients listed in the ingredients or have a history of serious adverse reactions. It is contraindicated in children. Patients who need to use it are recommended to use it under the guidance of a professional Chinese medicine practitioner.