Weight gain

I have been on Tamoxifen since January this year.My weight is exactly as it was when I was first diagnosed,but I have to work hard to keep it steady.I walk about 2 and a half kilometres each day( fast walking) and some days further.I watch my diet carefully,as I just don't want to put on weight.But as for whether Tamoxifen can cause weight gain,I wouldn't like to say.Our bodies are all so different too,so what causes weight gain in you may not cause it in me.I am interested to read other responses to your post.Cheers xox Robyn