What is chemotherapy?

Chemotherapy (often called chemo) uses powerful drugs to kill cancer cells. Most chemotherapy medicines travel via the bloodstream and can target cancer cells all over the body.

Chemotherapy may be used to:

  • Cure cancer or stop or slow its growth
  • Prevent cancer from coming back after treatment
  • Shrink tumors that are causing pain or other symptoms

Chemotherapy may be given on its own or combined with other cancer treatments. Sometimes patients receive chemotherapy before surgery or radiation therapy to shrink tumors so they're easier to remove or destroy. This is called neoadjuvant therapy. Chemotherapy can also be given after other treatments to kill any remaining cancer cells and prevent cancer from coming back. This approach is called adjuvant therapy.