Domestic gefitinib costs around 1600 yuan per box, and imported gefitinib tablets are around 2300 yuan per box. Gefitinib is a selective inhibitor of epidermal growth factor receptor, which can inhibit tumor growth, promote apoptosis of tumor cells, and improve the uncomfortable symptoms caused by tumors, and it is the first generation of targeted drugs used in the treatment of lung cancer, and Gefitinib can also improve the effect of chemotherapy or radiation therapy. Gefitinib can cause interstitial pneumonia, people with pulmonary fibrosis and impaired lung function should use this drug with caution to prevent the occurrence of fatal interstitial pneumonia, it may also produce digestive reactions, diarrhea, vomiting and other symptoms, for the blood and lymphatic system, ophthalmology will also have adverse reactions, there may also be skin reactions, rashes, itchy skin and other symptoms. Drugs need to be used under the guidance of a doctor, do not blindly use drugs, so as not to delay the condition.