Chemotherapy may not be recommended to stop for a period of time in the middle and then continue, but if the patient’s physical condition is poor and he/she cannot tolerate chemotherapy, then he/she should consult with his/her physician and should not stop the drug blindly by himself/herself. Chemotherapy is generally used according to the cycle of drugs, generally a cycle of 21-28 days, in this cycle, in addition to the beginning of the drug time, the rest of the time without the drug is given to the body’s normal tissues and cells to recover, this period of time to stop the drug is normal. It is not recommended to continue stopping the medication beyond the chemotherapy cycle to delay the next cycle of treatment, but if the patient experiences serious side effects it is possible to stop the medication and continue after recovery. The chemotherapy cycle is formulated according to the half-life of the drugs and the tumor multiplication time. Chemotherapy can kill some of the cancer cells according to the ratio, but a small number of cancer cells will continue to proliferate when the body is weakened or the immune system is weak, therefore, it is not recommended to stop chemotherapy for a certain period of time and then continue to use the drugs. If serious side effects such as nausea, vomiting, bone marrow suppression, etc. occur during chemotherapy, it is still not advisable to stop chemotherapy for a period of time without authorization, and a physician should be consulted and disposed of.