I have been on tamoxifen since January this year and to date have had no side effects at all, not even a hot flush. I eat well, exercise regularly and do not drink alcohol at all. As my doctors have said everyone's metabolism is different so therefore side effects may be different. Just remember that the list of side effects are there as a guide to what COULD happen and not what WILL happen. Sometimes it is easier for people to write about the 'bad' experiences they have had but I am sure there are many more women out there who like myself have had no issues. Good luck with your decision.
Cheers
Fiona