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Breast Cancer Clinical Trials »
A clinical trial is a research program conducted with patients to evaluate a new medical treatment, drug or device. The purpose of a breast cancer clinical trial is to find new and improved methods of treating the disease. Clinical trials make it possible to apply the latest scientific and technological advances to patient care.
During a breast cancer clinical trial, researchers, usually physicians, use the best available treatment as a standard to evaluate new treatments. These treatments may be a new drug, surgery or an alternative medicine.
First, researchers study new treatment options in the laboratory in test tubes and animals. If those results are promising, new treatments are further evaluated in a small group of people, and, finally, in a larger clinical trial.
When a new medical treatment is studied for the first time in humans, no one knows exactly how it will work. With any new treatment, there are possible risks as well as be...
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Tamoxifen blocks the actions of estrogen, a female hormone. Certain types of breast cancer require estrogen to grow.
Tamoxifen is used to treat and prevent some types of breast cancer.
Tamoxifen may also be used for other purposes not listed in this medication guide.
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using tamoxifen and call your doctor at once if you have any of these serious side effects:
Less serious side effects may include:
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
Do not use this medication without telling your doctor if you are pregnant. It could cause harm to the unborn baby. Use an effective form of birth control, and tell your doctor if you become pregnant during treatment.
Before using tamoxifen, tell your doctor if you are allergic to any drugs, or if you have liver disease, high triglycerides (fatty acids) in your blood, a history of cataract, or a history of stroke or blood clot. Also tell your doctor if you if you are receiving chemotherapy or radiation treatment.
If you are taking tamoxifen to reduce your risk of breast cancer, you may need to take your first dose while you are having a menstrual period. You may also need to have a pregnancy test before you start taking tamoxifen, to make sure you are not pregnant. Follow your doctor's instructions.
Taking tamoxifen may increase your risk of uterine cancer, stroke, or a blood clot in the lung, which can be fatal. Talk with your doctor about your specific risks in taking this medication.
To be sure this medication is not causing harmful effects, your doctor may want you to have mammograms and to perform routine breast self exams on a regular basis. Your liver function may also need to be tested. Do not miss any scheduled visits to your doctor.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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