Yes Thelma I have. After 2 months on femara I found the knee pain has mostly gone, as well as a regularly stiff neck and one sided pelvic joint pain I had. I was on letrozole too. I looked on a few ca help sites like this and a few women found femara not as hard on the body in that regard. So I tried that and overnight my knee pain was 50-60% better and the neck stiffnes gone. The pain had started within 2 weeks of being on letrozole and rapidly getting worse. I was limping badly and pain killers were not effective. I was so glad I found and tried Femara, a different brand of the same active ingredient. I don't know what others have found. The medical oncologist was happy for me to swap, but did not think it would work. I feel it did. And I've had other bad experiences with generic madication, must be a sensitive flower. Hoping you can work something out, good luck,