What Does Tamoxifen Citrate Do?

What Does Tamoxifen Citrate Do? Tamoxifen citrate blocks the effects of the hormone estrogen in breast tissue, which may help keep breast cancer cells from growing. It is a type of selective estrogen receptor modulator (SERM). What are the side effects of tamoxifen citrate tablets? increased tumor or bone pain. hot flashes. nausea. fatigue. mood