What is a 21-day chemotherapy cycle?

A 21-day cycle of chemotherapy begins on day 1 of chemotherapy and ends on day 21 as a complete cycle. Day 1 is the point at which chemotherapy begins, usually with an infusion or administration of chemotherapy drugs. This day marks the start of a new cycle. Over the next 20 days, the patient's body gradually responds to chemotherapy drugs. Side effects such as nausea, vomiting, hair loss, fatigue, etc. may occur. The doctor will pay close attention to the patient's condition and give appropriate supportive treatment and symptomatic treatment to help the patient relieve discomfort and maintain a relatively stable physical condition. Day 21 is the end of the cycle and the beginning of the next cycle. The doctor will conduct a comprehensive evaluation of the patient, including blood tests, liver and kidney function tests, to determine whether the patient is suitable for the next round of chemotherapy. If the patient's physical condition allows, a new chemotherapy cycle will be started according to the established schedule; if there are some abnormal conditions, chemotherapy may need to be adjusted or delayed. It should be noted that the specific schedule of chemotherapy cycles may vary according to individual differences of patients, diseases and chemotherapy drugs used. Doctors will make individualized formulation and adjustment according to the specific conditions of patients to ensure the effectiveness and safety of chemotherapy. During chemotherapy, patients should be treated and followed up in strict accordance with the doctor's requirements, and any discomfort in the body should be fed back to the doctor in time, so that the doctor can handle it in time to ensure the smooth progress of treatment.

At the same time, patients and family members should also actively cooperate with doctors to do a good job of self-care and life management, such as maintaining a good diet, adequate sleep, moderate exercise, etc., so as to improve the body's resistance and tolerance to chemotherapy.