I have been on Tamoxifen for nearly three years now. I started on Arimidex but the joint pain was too much for me so I asked to swap. I certainly have hot flushes and still some joint pain but not as bad as before. I consider that the additional benefit Tamoxifen gives me is worth the discomfort I have and just get on with things . When I am finally off this drug I will look back and think it wasn't too bad.
But I agree give it a try and if it is not for you ask to try a different drug.