Like radiation, chemotherapy is used in conjunction with other forms of breast cancer treatment to maximize results. This medication, which is administered as a pill or injection, can help shrink tumors to make surgical removal easier, but it can also be used after surgery to prevent cancer cells from coming back. Although chemotherapy is sometimes used during the early stages of breast cancer, it's most often used to treat late-stage breast cancer that has spread to other parts of the body. Depending on a patient's particular case, chemotherapy is typically administered once every one to three weeks for three months or longer.
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