Chemotherapy is a common treatment for metastatic breast cancer. It involves the use of drugs to kill cancer cells. Chemotherapy is usually given intravenously (through a vein) or orally (by mouth). The drugs are usually given in cycles, with rest periods in between to allow the body to recover. Chemotherapy can cause side effects, such as nausea, vomiting, hair loss, and fatigue. However, these side effects can be managed with medication and lifestyle changes.

Hormonal therapy is another treatment option for metastatic breast cancer. It is used for hormone receptor-positive breast cancer, which means that the cancer cells have receptors for estrogen or progesterone. Hormonal therapy works by blocking the effects of these hormones or reducing their production. This can slow down or stop the growth of the cancer cells. Hormonal therapy can be given in the form of pills or injections. Side effects may include hot flashes, vaginal dryness, and joint pain.

Targeted therapy is a newer type of cancer treatment that targets specific proteins or genes that are involved in the growth and spread of cancer cells. Targeted therapy drugs can be given intravenously or orally. They may be used alone or in combination with other treatments, such as chemotherapy or hormonal therapy. Targeted therapy drugs can cause side effects, such as skin rashes, diarrhea, and high blood pressure.

Radiation therapy is a treatment that uses high-energy radiation to kill cancer cells. It can be used to treat metastatic breast cancer that has spread to the bones, brain, or other organs. Radiation therapy can relieve pain and other symptoms caused by the cancer. The side effects of radiation therapy depend on the area being treated. Common side effects include skin irritation, fatigue, and nausea.

Surgery is not often used as a treatment for metastatic breast cancer. However, it may be used in some cases to remove a tumor that is causing pain or other symptoms. Surgery may also be used to stabilize a bone that has been weakened by cancer.

Clinical trials are research studies that test new treatments for cancer. They are designed to find out if a new treatment is safe and effective. Clinical trials may involve new drugs, new combinations of drugs, or new ways of giving existing drugs. Participation in a clinical trial may be an option for people with metastatic breast cancer who have not responded to other treatments.