The third generation of targeted drugs can not only eat three years, mainly depends on the patient’s drug resistance. Third-generation targeted drugs can be taken for a long period of time in the absence of adverse reactions and drug resistance, so there is no such thing as only three years, and the specific time of taking the drug needs to be determined according to the patient’s condition, except that most of the patients in the clinic are taking the targeted drug for 1~1.5 years, and the condition will have new progress and need to replace other drugs. Targeted drugs can precisely act on tumor tissues to keep the tumor in a stable state or shrink, but cannot achieve the effect of a complete cure, therefore, it is necessary to take drugs for a long time, during which you can’t just stop taking drugs or change drugs, and you need to listen to the guidance of professional doctors.