There is no exact answer to how many times chemotherapy is the most dangerous; it needs to be determined by the drugs used, the dosage, and individual differences in the patient.
Chemotherapy is a common cancer treatment, because the degree of the disease is different, the treatment cycle will be different, each chemotherapy may have certain risks. So there is no saying which course of chemotherapy is the most dangerous. Also as the immune system declines, the adverse effects can worsen. Most of the adverse reactions are usually noticeable on the third or fourth chemotherapy session and are relatively more dangerous.
When chemotherapy is administered, as the chemotherapeutic drugs are toxic to both tumor cells and normal cells, the adverse reactions increase with the number of chemotherapy sessions, and symptoms such as low immunity and severe hair loss can occur. In severe cases, it may also lead to bone marrow suppression, reduction of white blood cells, red blood cells and platelets, causing bleeding, which is even more dangerous and requires immediate discontinuation of the drug and symptomatic treatment under the guidance of a doctor.
Because each person’s condition is different, the course of chemotherapy is also different, generally speaking, the more chemotherapy the more dangerous. If the patient’s adverse reaction is obvious, you can take drugs under the guidance of the doctor for targeted treatment, and if necessary, you can suspend the treatment.