Chemotherapy is a medical treatment that uses powerful drugs to kill or slow the growth of cancer cells. It is commonly used for various types of cancer, either alone or in combination with other treatments such as surgery and radiation therapy. Chemotherapy works by targeting rapidly dividing cells, which includes cancer cells, but it can also affect healthy cells, leading to side effects. The drugs can be given orally, through intravenous (IV) infusion, or injected into specific areas of the body. The frequency and duration of chemotherapy depend on the type and stage of cancer. Advances in chemotherapy have improved effectiveness while reducing side effects, helping patients manage their condition more effectively.