What are the adverse reactions of chemotherapy Chemotherapy is a method to kill tumor cells with chemical drugs for the purpose of treating malignant tumors. It is the most common means of treating leukemia, lymphoma, and various other malignant tumors, and the chemical drugs used are often cytotoxic drugs that are toxic to both tumor cells and normal cells. Killing tumor cells will show the efficacy we need, while killing normal cells will show the adverse reactions we don’t need, which are the side effects. 1.Blood cytopenia: including leukopenia, erythrocytopenia (anemia), thrombocytopenia, which is the performance of normal hematopoietic cells of bone marrow killed by chemotherapy drugs. 2, hair loss: 2-3 weeks after the start of chemotherapy drug will appear obvious hair loss, which is the skin hair follicles by chemotherapy drug damage performance. 3, nausea, vomiting, loss of appetite, mouth ulcers: this is a manifestation of the epithelial cells of the mucosa of the digestive tract being killed by chemotherapeutic drugs. 4. Hematuria, hemorrhagic cystitis: this is a manifestation of damage to the epithelial cells of ureter and bladder. 5. Numbness of finger ends, constipation, abdominal distension: this is a manifestation of damage to peripheral nerves. 6. Abnormal liver and kidney function: This is a manifestation of chemotherapy drug damage to liver cells and kidney cells. 7. Cardiac arrhythmia, cardiac insufficiency: this is a manifestation of damage to cardiac muscle cells. 8, impaired fertility: this is a manifestation of damage to germ cells by chemotherapy drugs. 9, other: skin, nail pigmentation, headache, weakness, etc., are the performance of the normal physiological processes in the body is disturbed. These chemotherapy adverse reactions on the one hand with the type of drug, the size of the dose, different drugs have different adverse reactions, drug dose, adverse reactions are serious; on the other hand, the individual differences with the patient, the same dose of drugs in different patients may show all the different adverse reactions. Doctors in the choice of drugs, will take into account the relationship between efficacy and adverse reactions, but also often use other drugs to counteract, offset the adverse reactions of chemotherapy drugs, in order to increase the efficacy and reduce the purpose of adverse reactions.