Chemotherapy is the use of medicine to destroy cancer cells.
Sometimes medicines are put into the blood, usually in a vein, so that they can travel to cells all over the body. This is called systemic chemotherapy.
But chemotherapy also may be:
Chemotherapy can cause side effects, such as nausea and vomiting. Some side effects go away after treatment is finished. But other side effects, such as infertility, may be permanent.
WebMD Medical Reference from Healthwise