I have been on tamoxifen about 4 and half years and I really don't think I can attribute any side effects to it. I did get hot flushes initially but they were no doubt due to chemo putting me into early menopause ie I expect I would have had them even without tamoxifen. I have opted to stay on it - with oncologists approval - despite being nearly 5 years post menopause because I have not had any problems with it. The side effects from aromatase inhibitors sound much worse to me. Personally I think it is a better option (for me anyway) because it allows you to retain your circulating estrogen (reduced though it is anyway due to menopause) which is better for your bones and sexual health. Having said all that, I am curious to see whether I will feel any different - better? - when I stop taking it early next year.