The purpose of chemotherapy is to kill tumor cells, and the stronger the cytotoxic effect of chemotherapy drugs, the higher the dose used, the stronger the killing effect on tumor cells. Therefore, the killing effect of chemotherapy drugs on tumor cells and normal cells (such as blood-forming cells, immune cells, gastrointestinal cells, liver and kidney cells) is equivalent, which leads to serious toxic side effects of chemotherapy. For example, patients have reduced white blood cells and immunity after chemotherapy, and gastrointestinal reactions cause nausea and vomiting, making it almost impossible for patients to eat, and in severe cases, liver and kidney function may be damaged. Side effects of lung cancer chemotherapy: Most lung cancer chemotherapy drugs have different degrees of bone marrow suppression. In the early stage, myelosuppression can be manifested as the reduction of white blood cells, especially granulocytes, and in severe cases, platelets, red blood cells and hemoglobin can be reduced. Before each lung cancer chemotherapy, a blood test should be done. If the number of white blood cells is lower than (2.5~3)×109/liter and platelets (50~80)×109/liter, lung cancer chemotherapy should be temporarily stopped and blood cell raising drugs should be used according to the doctor’s prescription. Side effect two, immunosuppression: lung cancer chemotherapy drugs are generally immunosuppressive drugs, which have different degrees of inhibitory effects on the immune function of the body. When the immune function is low, the tumor is not easily controlled, but accelerates the process of recurrence or metastasis. Side effect three, pulmonary toxicity: some lung cancer patients may develop chronic pulmonary fibrosis and acute pulmonary fibrosis after chemotherapy, which can be clinically manifested as fever, dry cough, shortness of breath, and most patients have acute onset with granulocytosis and even respiratory failure. Lung conditions should be checked regularly during the use of lung cancer chemotherapy drugs, and follow-up should be paid attention to after stopping the drugs. Once pulmonary toxicity is detected, lung cancer chemotherapy should be stopped immediately and treated with hormones. Side effect 4, hair loss and skin reactions: Some lung cancer patients will have hair follicles damaged during chemotherapy, and hair loss will occur after applying lung cancer chemotherapy drugs, and the degree of hair loss is usually related to the concentration and dose of drugs. The extent of hair loss is usually related to the concentration and dose of the drug. There is no need to be overly concerned about hair loss because generally, after patients stop taking the drug, the lost hair will grow back and the erythema, rash and hyperpigmentation of the skin will improve or disappear. Side effect 5, gastrointestinal toxicity: Most lung cancer chemotherapy drugs can cause gastrointestinal reactions, such as dry mouth, loss of appetite, nausea, vomiting, and sometimes oral mucositis or ulcers. Constipation, paralytic intestinal obstruction, diarrhea, gastrointestinal bleeding and abdominal pain can also be seen. Side effect VI, liver damage: lung cancer chemotherapy drugs can damage liver cells to different degrees, resulting in increased glutamate transaminase, rising bilirubin, hepatomegaly, pain in liver area, jaundice, etc. The liver reactions caused can be acute and transient liver damage, or can be due to: long-term use of lung cancer chemotherapy drugs, causing chronic liver damage, such as fibrosis, steatosis, granuloma formation, eosinophil infiltration, etc. Therefore, before and during the use of lung cancer chemotherapy drugs, liver function should be checked, so that problems can be detected and solved in time, and lung cancer chemotherapy can be stopped if necessary. Chinese medicine formulas assist lung cancer chemotherapy to increase efficiency and reduce toxicity Surgical resection is the best treatment for lung cancer at present, but even for radically resected lung cancer patients, 50%-70% of them still cannot avoid recurrence and metastasis after surgery, so recurrence and metastasis after lung cancer surgery is the root cause of treatment failure. According to Chinese medicine, there are two reasons for the recurrence and metastasis of lung cancer after surgery, one of which is that the residual toxicity of lung cancer has not been exhausted, and the other is that surgery and radiotherapy have damaged the patient’s immune system, resulting in lowered immunity that is insufficient to resist the resurgence of cancer genes and the metastasis and proliferation of cancer cells. Therefore, it is advocated that drugs are needed to maintain and consolidate the therapeutic effect for a long period of time after lung cancer surgery. And Chinese medicine can rapidly restore the patient’s immune function by tonifying qi and blood, benefiting qi and nourishing yin, and regulating the spleen and stomach after surgery.