I’ve been on tamoxifen for two years. Lately, the back of my knees are swollen and my whole legs are cramping and achy. They are exactly the same on both sides, although I am going to go get an ultrasound tomorrow to make sure no DVT. Has anyone experienced this? I tried to ask my oncologist, and her nurse intercepted my email and told me to go off tamoxifen for three weeks. I don’t want to do that. I just want to know if these are side effects of tamoxifen.