Commonly reported side effects of tamoxifen include: amenorrhea, fluid retention, hot flash, nausea, vaginal discharge, vaginal hemorrhage, weight loss, and skin changes. Other side effects include: infection, sepsis, alopecia, constipation, cough, diarrhea, edema, increased serum aspartate aminotransferase, infrequent uterine bleeding, menstrual disease, ostealgia, vomiting, and weight gain. See below for a comprehensive list of adverse effects. Applies to tamoxifen: oral solution, oral tablet Along with its needed effects, tamoxifen may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor immediately if any of the following side effects occur while taking tamoxifen: Some side effects of tamoxifen may occur that usually do not need medical attention. "UK Summary of Product Characteristics." O 0Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances. These side effects may go away during treatment as your body adjusts to the medicine. Some types of breast cancer are affected by hormones in the blood. ER-positive and PR-positive breast cancer cells have receptors (proteins) that attach to estrogen, which helps them grow. There are different ways to stop estrogen from attaching to these receptors. Hormone therapy is a form of systemic therapy, meaning it reaches cancer cells almost anywhere in the body and not just in the breast. It's recommended for women with hormone receptor-positive (ER-positive and/or PR-positive) breast cancers, and it does not help women whose tumors are hormone receptor-negative (both ER- and PR-negative). Hormone therapy is often used after surgery (as adjuvant therapy) to help reduce the risk of the cancer coming back. Sometimes it is started before surgery (as neoadjuvant therapy) as well. Hormone therapy can also be used to treat cancer that has come back after treatment or that has spread to other parts of the body.
Tamoxifen (Nolvadex®) is a medication in pill form that has been used for more than 25 years to treat breast cancer in women and men. Tamoxifen is one of the most common endocrine therapy drugs. It has been shown to decrease the chance of recurrence in some early-stage breast cancers and to prevent the development of cancer in the opposite breast. Tamoxifen can also slow or stop the growth of cancer cells present in the body. There are an estimated 29 million women at increased risk for breast cancer in this country, and tamoxifen may offer another alternative to watchful waiting or prophylactic (preventative) mastectomy. Tamoxifen is classified as a selective estrogen receptor modulator (SERM) and works as an anti-estrogen: While the hormone estrogen promotes the growth of breast cancer cells, tamoxifen works by blocking estrogen from attaching to estrogen receptors on these cells. By blocking the estrogen receptors, it is believed that the growth of the breast cancer cells will be halted. Tamoxifen has rarely caused very serious (possibly fatal) strokes, blood clots in the lungs/legs, and cancer of the uterus. If you are taking tamoxifen to reduce the risk of breast cancer, or if your cancer is limited to the milk ducts (ductal carcinoma in situ-DCIS), then discuss the benefits and risks of taking this medication with your doctor. However, if you are taking tamoxifen to treat breast cancer, then the benefits of taking tamoxifen are greater than the risks of side effects. Get medical help right away if you develop symptoms of a stroke or blood clots in the lungs/legs, such as weakness on one side of the body, slurred speech, sudden vision changes, confusion, shortness of breath, chest pain, or calf pain/swelling. Tell your doctor right away if you develop symptoms of cancer of the uterus, such as unusual changes in your monthly period (e.g., amount or timing of bleeding), unusual vaginal discharge, or pain/pressure below your "belly button" (navel). Show More Tamoxifen is used to treat breast cancer. It is also used to reduce the chances of breast cancer in high-risk patients. This medication can block the growth of breast cancer.
Like other types of cancer treatment, hormonal therapy has side effects. But in very rare cases, tamoxifen can raise a woman's chances of getting endometrial. Side Effects. Drug information provided by IBM Micromedex Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.