Targeted drugs need to be selected by a specialist based on the condition. Targeted drugs need to be selected according to the receptors on the surface of tumor cells and the genes and kinases that regulate tumor growth. Targeted therapies have achieved certain effect on various types of gene regulation therapy, for example, Herceptin is designed to target the overexpression of her-2 gene in the nucleus of tumor cells, thus increasing P185 in the cell membrane, and rituximab is an anti-CD20 protein targeting drug for B-cell lymphomas, and so on. Targeted drugs have certain adverse reactions, such as diarrhea, rash and granulocytopenia, liver and kidney function impairment, etc., allergic to targeted drugs is prohibited. Targeted drugs, it is recommended to go to the hospital, clear diagnosis and treatment, by the guidance of the specialist to choose the drug, do not self-medication.