Chemotherapy uses anti-cancer (cytotoxic) drugs to destroy cancer cells. Cytotoxic means toxic to cells.
Cytotoxic chemotherapy drugs disrupt the way cancer cells grow and divide, but they also affect normal cells. These healthy cells can usually repair damage caused by chemotherapy but cancer cells can’t and eventually die.
Chemotherapy is often used to treat cancer. It is sometimes used on its own, but is commonly used in combination with other cancer treatments.