I have been on tamoxifen for almost 11 months. I was extremely anxious about taking it initally, almost to the point that I was considering not taking it. So much of what I had read on the internet was negative - weight gain, insomnia, depression etc. The list of possible side effects seemed to be endless.
However, to be honest, I haven't found tamoxifen too bad. I do get mild hot flushes, particularly at night. But they did start just after I finished chemo which has put me into early menopause (I'm 47). So maybe I would be having them even if I wasn't on tamoxifen. From time to time I do wake up very early in the morning (like today) but my insomnia seems to have lessened over time. I'm not finding it a major problem at the moment.
I've so far managed to avoid gaining weight but I am fairly careful about what I eat and I am exercising about 5 days a week. I suspect if I wasn't excercising so much my weight would creep up. But then again, I've always gained weight easily, so maybe nothing has changed there. I guess what I'm saying is that it's hard to be sure any particular issue is related to tamoxifen.
I do worry a bit about the risk of uterine or endometrial cancer. I plan to ask my gp to refer me for a pelvic ultrasound in a year or to just to make sure everything is okay there.
I guess my attitude now is that even though I don't like taking medication every day I am grateful that tamoxifen is available to minimise the chance of recurrance. My advice would be to give it try as it may not be as bad as fear and it could save our lives. Good luck, Janet.