In general, targeted therapy drugs bring significantly less adverse reactions to patients than chemotherapy drugs because of the precise site of action. Targeted therapy is a therapeutic approach that targets a specific part of the production or survival of cancer cells at the cellular molecular level. Currently, the drug treatment of tumor mainly includes chemotherapy, targeted therapy and immunotherapy. Targeted drugs work on the unique growth sites of tumor cells and have significantly less effect on normal human cells than chemotherapeutic drugs. Common side effects of targeted drugs include nausea, vomiting, high blood pressure, dizziness, diarrhea, skin problems, etc. However, compared with traditional chemotherapy drugs, these adverse effects of targeted drugs are less severe. Therefore, the side effects of targeted drugs are significantly less severe than those of chemotherapy drugs for most patients. All drugs should be used in accordance with medical advice.