Tamoxifen 40 treats and prevents breast cancer. It is typically taken for 5 years, unless your doctor tells you otherwise. A common side effect is hot flashes. This is not a serious problem.
Tamoxifen is a prescription drug used to treat breast cancer and reduce the chance of developing breast cancer. Some types of breast cancer need estrogen to grow. Tamoxifen belongs to a group of drugs called anti-estrogens, which can block the effects of estrogen by slowing the growth of cancer cells.
This drug comes in a tablet and an oral solution and is usually taken once or twice a day.
Side effects of tamoxifen include hot flashes and vaginal discharge.
Tamoxifen genetic information
Breast cancer is cancer that forms in the cells of the breast. The development of breast cancer is closely related to the amount of estrogen the breasts are exposed to over time. Some women have hormone receptor positive (ER / PR +) breast cancer. Estrogen receptors are proteins found on the surface of cells. Cancer cells grow in response to estrogen binding to these receptors. Tamoxifen reduces the amount of estrogen in the blood by limiting the amount of estrogen available to bind to these receptors. This slows or stops the growth of cancer cells.
Hormone receptor testing is done to determine how likely tamoxifen is to be an effective treatment. Patients who do not have hormone receptor positive breast cancer are unlikely to respond to tamoxifen treatment.
Uses of Tamoxifen 40
Tamoxifen 40 is a prescription drug used:
reduce the chance of getting breast cancer in women with a higher than normal chance of getting breast cancer in the next 5 years (high-risk women)
reduce the chance of getting invasive (spread) breast cancer in women who have undergone surgery and radiotherapy for ductal carcinoma in situ (DCIS). DCIS means that the cancer is found only inside the milk ducts
to treat breast cancer in women after finishing treatment early. Early treatment can include surgery, radiation, and chemotherapy
in women and men, to treat breast cancer that has spread to other parts of the body (metastatic breast cancer)
This drug can be prescribed for other uses. Ask your doctor or pharmacist for more information.