I see you've not had many replies but it could be that I don't think there are many of us secondary ladies who are taking Tamoxifen so thererfore can't add any advice for you. A lot of us (I think) had it with our primary and therefore don't re-visit a therapy very often, although some of us do. I have recently started on Letrozole and, again, there's not many secondary ladies on it (or not on the forum at the moment). I have asked questions and read other threads in the 'Going through treament' part of the main forum where there is a section for Hormone therapy. It may be worth looking there or posting your question again in that section. It doesn't seem to matter whether we have primary or secondary BC when it comes to side effects from the treatments we are have - they are all rubbish!
Was put on Tamoxifen after Letrozole did not work for very long and it seems to be working out fine as mets seem to be shrinking. My problem is fatigue, and it seems to be getting worse all the time. Has anyone been put on anything that helps with this?