Chemotherapy for lymphoma uses drugs to kill lymphoma cells. It is called systemic therapy because the drugs travel through the bloodstream. The drugs can reach lymphoma cells in almost all parts of the body. You may receive chemotherapy by mouth, through a vein, or in the space around the spinal cord. Treatment is usually in an outpatient part of the hospital, at the doctor’s office, or at home. Some people need to stay in the hospital during treatment. Chemotherapy is given in cycles. You have a treatment period followed by a rest period. The length of the rest period and the number of cycles depend on the stage of your disease.