I took Tamoxifen about 2 months, then I developed hot flashes, sweats day and night, swelling of the eyes, leg and foot cramps, etc.. I decided to stop Tamoxifen about three weeks ago, my side effects are still persistent now. I should not follow my onco's suggestion, she convinced me with lowest dosage 5mg per day, and stop any time when I feel side effects. Now I have to wait to see how long the side effects will go away.