Chemotherapy is the use of drugs to treat cancer.
Normal cells grow and die in a controlled way.
Cancer occurs when cells become abnormal and keep dividing and forming more cells without control or order. Chemotherapy destroys cancer cells by stopping them from growing or multiplying. Some drugs work better together than alone, so chemotherapy often may consist of more than one drug. Other types of drugs may be used to treat your cancer. These may include certain drugs that block the effect of hormones.