Chemotherapy is a type of cancer treatment that uses powerful medicines to kill or slow the growth of cancer cells. These drugs can be given in various ways, such as through an injection, a pill, or an IV. While chemotherapy can be effective in treating many types of cancer, it can also affect healthy cells, leading to side effects like fatigue, nausea, and hair loss. Doctors often use chemotherapy in combination with other treatments, such as radiation therapy or surgery, to improve the chances of recovery. The specific plan for chemotherapy depends on the type of cancer, its stage, and the patient's overall health.