I’m surfing the net to try to find out why I have aching arms and hands - come across this website & it’s made very interesting reading. I’ve taken Tamoxifen since last Dec and the last 3 weeks I have had aching, weak arms & hands. Sometimes my legs are affected too. I hadn’t really considered side affects of Tamoxifen as a possible cause but now I have reason to question my oncologist on my next visit. Thanks everyone!!