What are the side effects of tamoxifen?
The side effects vary from individual to individual, but can include hot flashes, mood swings, vaginal discharge, inability to concentrate and, less frequently, endometrial cancer, blood clots, weight gain and visual problems. Tamoxifen should not be taken if pregnant because it can cause harmful damage to developing embryos. Furthermore, women should not get pregnant during treatment. Tamoxifen can increase fertility so it is important to use some form of contraception during treatment. Women should discuss with their doctors if they plan on becoming pregnant fewer than five years after treatment to determine the risks and see if other options are available.