Hematology generally does not see drug toxicity. Hematology is a department specializing in the diagnosis and treatment of various blood system diseases, including red blood cell system diseases, such as true erythrocytosis, primary thrombocythemia, myelodysplastic syndromes, and various types of anemia; malignant diseases of the blood system, such as leukemia, lymphoma, myeloma, and so on; hemorrhagic disorders, such as anaphylactic purpura, disseminated intravascular coagulation, hemophilia, and so on. Drug poisoning is mostly acute, such as hypnotic drug poisoning, organophosphorus pesticide poisoning, etc., need to go to the emergency department for emergency treatment. However, chronic drug poisoning symptoms are mostly not obvious, the course of the disease is long, it is not easy to diagnose, usually will be consulted in the internal medicine department.