Dengue fever injection generally refers to artesunate for injection, which has a certain therapeutic effect on dengue fever, but the specific efficacy varies from person to person. Dengue fever is an acute infectious disease caused by dengue virus, mainly transmitted by mosquito bites. The clinical manifestations are mainly characterized by high fever, rash, headache, muscle and joint pain, etc. Currently, there is no specific antiviral drug, and mainly symptomatic supportive treatment is provided. Artesunate for injection is a new type of antimalarial drug with a broad-spectrum antimalarial effect, which can inhibit the rupture of Plasmodium erythrocytes and thus kill Plasmodium. Artesunate for injection also has immunomodulatory effects, which can enhance the immune system of the body. Clinically, artesunate for injection is mainly used to treat malaria, severe malaria, cerebral malaria and other diseases. For patients with dengue fever, if symptoms such as fever and rash occur, artesunate for injection can be used under the guidance of a doctor. However, this drug may cause adverse reactions such as nausea, vomiting, diarrhea, and other gastrointestinal reactions. It is necessary to closely observe the patient's condition changes during use and seek medical attention promptly. Artesunate for injection has a certain therapeutic effect on dengue fever, but the specific efficacy varies from person to person. It is recommended that patients use this drug under the guidance of a doctor and observe their condition. If discomfort or worsening symptoms occur, please seek medical attention promptly.