Tamoxifen blocks the actions of estrogen in breast tissue and is used to treat estrogen receptor-positive breast cancer in adults and to lower the risk of breast cancer in women with DCIS or at high risk. Learn about side effects, interactions, and indications. Tamoxifen (Nolvadex) is a hormone therapy. Hormone therapy is also called endocrine therapy. Tamoxifen has been used for over 40 years to treat hormone-receptor positive early, locally advanced and metastatic breast cancers. It’s used to treat breast cancer in both women and men. Tamoxifen, sold under the brand name Nolvadex among others, is a selective estrogen receptor modulator used to prevent breast cancer in women and men. [15] It is also being studied for other types of cancer. [15] Tamoxifen (Nolvadex) prescribed for the prevention and treatment of breast cancer in men and women, and occasionally, to stimulate ovulation in women. Common side effects include depression, nausea, vomiting, and headache. Nolvadex (Tamoxifen Citrate) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. Find patient medical information for Tamoxifen on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Nolvadex package insert / prescribing information for healthcare professionals. Includes: indications, dosage, adverse reactions and pharmacology. Learn about tamoxifen (Nolvadex) usage and dosing. Read the latest news and reviews about the drug as well as potential side effects and popular alternatives. Tamoxifen (brand names: Nolvadex, Soltamox) is a medicine that blocks the effects of the hormone estrogen (called a selective estrogen receptor modulator, or SERM). Tamoxifen is a first choice among doctors for treating women who have not yet gone through menopause. Tamoxifen (Nolvadex® or Soltamox®) is a drug that treats hormone receptor-positive (hormone-positive) breast cancer. (Hormone-positive breast cancer is a type of cancer that needs estrogen and/or progesterone to grow.).