This content has not been reviewed within the past year and may not represent Web MD's most up-to-date information. To find the most current information, please enter your topic of interest into our search box. 17 (Health Day News) -- Some women who take tamoxifen to treat or prevent breast cancer report experiencing a mental fogginess while on the drug, and researchers have now confirmed that there's a biological basis for those symptoms. The researchers were able to isolate the cells in the human brain and nervous system that are harmed by tamoxifen therapy. And, in a second phase of the study conducted with mice, they were also able to find a different drug that could protect healthy cells from tamoxifen toxicity while offering no protection to cancer cells. Compared to other forms of cancer treatments, it has relatively few serious side effects. "Patients aren't always taken seriously when they report these mental side effects, but now we can say this is an organic syndrome to which we have to pay attention," said Mark Noble, senior study author. This is not a hopeless situation," added Noble, a professor of biomedical genetics, and director of the University of Rochester Stem Cell and Regenerative Medicine Institute, in Rochester, N. Tamoxifen works by blocking the action of estrogen in breast tissue, which keeps estrogen-sensitive breast cancers from growing, according to the U. However, in some women who take it, tamoxifen causes problems with thinking. One expert was pleased to see new scientific support for what she's observed in her clinical practice. "There is a subset of women who report this mental fog while on tamoxifen. They initially experience this very noticeable side effect, but then it improves. azithromycin z pack dose Compared to chemotherapy, tamoxifen has fewer side effects. Menopausal symptoms (such as hot flashes) are common in women who take tamoxifen . Although menopausal symptoms may become less frequent and less intense over time, they can still be hard to manage. If you have symptoms, talk with your health care provider about ways to treat them. The most serious health risks of tamoxifen, such as endometrial cancer (cancer of the lining of the uterus) and blood clots in the lungs, are rare . Figure 5.10 lists some possible side effects and health risks of tamoxifen in women. Although both aromatase inhibitors and tamoxifen can cause menopausal symptoms such as hot flashes, many of their side effects differ. Learn about how the side effects of these hormone therapies compare. Valtrex pregnancy How to buy lisinopril online Aug 26, 2009. While long-term tamoxifen use among breast cancer survivors decreases their risk of developing the most common, less aggressive type of. clomid ovulation calculator Well just started tamoxifen today- as a matter of fact first pill 30minutes ago. My doctor was pretty honest and said about 50% of her patients have no side-effects and take it like a vitamin- the other 50% have any range to all of the side-effects and struggle with it. Conversely, treatment with 5 years of tamoxifen can cause side-effects such as. However, definite long-term side-effects of tamoxifen do exist, which require. Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them: Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional. Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088. Summary In a pooled analysis of data from participants in 20 clinical trials, women with estrogen receptor-positive breast cancer who were assigned to receive about 5 years of adjuvant treatment with tamoxifen had a lower risk of recurrence in the 15 years after starting treatment than women who did not receive tamoxifen. Women who took tamoxifen also had a one-third reduction in the risk of dying from breast cancer throughout the 15-year follow-up period. Source The Lancet, August 27, 2011 (see the journal abstract). Background In many breast cancers, tumor cells have receptors for the hormone estrogen and may depend on estrogen for growth. For women with this type of breast cancer—called estrogen receptor-positive (ER-positive) breast cancer—hormone therapy (drugs that block the action of estrogen or prevent it from binding to the estrogen receptor) is a standard part of treatment. The main drugs used in adjuvant hormone therapy for women with early-stage ER-positive breast cancer are tamoxifen and the aromatase inhibitors anastrozole, letrozole, and exemestane. Of these drugs, tamoxifen has been used the longest in breast cancer treatment. Tamoxifen long term side effects Long-term effects of continuing adjuvant tamoxifen to 10., Breast Cancer Topic Tamoxifen side effects and long Term use Fluconazole 200 mg for dogs Zoloft side effects in men Prednisone treats Ciprofloxacin news Tamoxifen didn’t reduce the risk that women diagnosed with hormone-receptor-negative breast cancer would die from breast cancer. These very positive results show that the benefits of tamoxifen are long-lasting. Like most breast cancer treatments, tamoxifen can cause side effects, including hot flashes and night sweats. Two Years of Tamoxifen After Surgery Offers Long-Term. Long-term effects of continuing adjuvant tamoxifen to 10 years versus. Breast cancer drug tamoxifen has long-term effect, study finds Society. Nov 23, 2011. It is also an option for women who have too many side effects on an aromatase inhibitor, “so tamoxifen is still in our drug arsenal and shouldn't. order amoxil online Once breast cancer treatment ends, most side effects go away. However, you may have some long-term side effects. New side effects may occur months or even. Side effects of tamoxifen versus side effects of aromatase inhibitors. Although both aromatase inhibitors and tamoxifen can cause menopausal symptoms such as hot flashes, many of their side effects differ. Learn about how the side effects of these hormone therapies compare.