It is not recommended to interrupt chemotherapy for lung cancer after two times, which may affect the efficacy. Chemotherapy for lung cancer is an important treatment mode, which is carried out on time, according to the cycle and according to the dosage in order to achieve better therapeutic effect. A certain percentage of tumor cells will be killed after each chemotherapy, and then normal cells and tumor cells recover together during the recovery period, because tumor cells have defects, so the number of recovery is less than that of normal cells. By repeating chemotherapy many times on time, you can kill the tumor cells at a lower number as much as possible and rely on your own immunity to kill the residual tumor cells and achieve a cure. Interruption of chemotherapy will result in more tumor cells recovering, which will affect the prognosis and is not recommended.