What kind of injection for anemia gets better fastest depends on the type of primary disease that causes anemia, such as iron deficiency playing iron sucrose and other iron agents, macrocytic anemia with insufficient raw materials can play folic acid and vitamin B₁₂ preparations, bone marrow dysfunction playing erythropoietin and so on. 1. Iron deficiency anemia: mainly because of iron deficiency, can be oral drugs and injectable drugs. Oral drugs can choose oral iron supplement drugs such as ferrous succinate, ferrous sulfate and multivitamin iron. If the function of gastrointestinal tract is not good, you can use injectable drugs, such as iron sucrose injection. 2. Insufficient hematopoietic raw materials: folic acid deficiency can be caused by oral or injectable folic acid preparations, vitamin B₁₂ deficiency, oral or injectable vitamin B₁₂ as well as supplemental meat food. 3. Abnormal bone marrow function: erythropoietin can be injected to increase hemoglobin. 4. Malignant blood diseases such as leukemia: chemotherapeutic drugs such as cytarabine and demecloxazolamycin can be given intravenously, and the symptoms of anemia can only be improved when the disease reaches remission. Daily diet should pay attention to replenish enough nutrients, it is recommended to go to the relevant professional department in time, follow the doctor’s instructions to use the above drugs, so as not to delay the condition.