In a sense, tamoxifen has a positive effect on bones by not having the negative effect on them of total depletion of estrogen from the body. So estrogen remains available to perform the myriad roles it has throughout our lives. It just can't fuel estrogen-positive cancers because the drug prevents cancer cells' ability to access the cancer at the receptor level. They're both serious medications but, in a sense, the SERMs seem a more elegant approach by depriving only cancer cells, but not the rest of the body, of a key hormone. It's great that it works for you. It has saved thousands of lives so far, including two friends of mine.