I haven't put any weight on whilst on Tamoxifen. I have been on it now since the beginning of 2011 (so 2 years). I have taken up running and find that this has helped a lot with my metabolism (and this is from someone who said that they would NEVER run!!). Another benefit of the running is a big reduction in the cellulite on my thighs - great!
The hot flushes and night sweats are my only problems and after having breast cancer twice, I think I can put up with those. Yes, there are nights when i get little sleep and am tossing and turning a lot. I find a fan in my bedroom that I can put on when I am at my worst helps no end. The hot flushes do tend to come and go.....sometimes, particularly around the time of my period, they are worse than others.
Keep positive ladies. We are lucky to have made it this far :)
ps Tamoxifen doesn't stop you producing oestrogen. It turns off the cell receptors that are triggered by the oestrogen production.
Happy New Year and stay healthy,
Louise