Hi, I'm Aliza a BC patient and Medical Librarian (retired). I do research and referrals for people on this site and elsewhere. Your question is too open ended to answer (I've answered lots of Reference questions in medicine and other subjects, so I know). You don't give enough information. You don't have any experiences (I've checked) so we don't know anything about your breast cancer, so no medical professional on the site could possibly advise you as to what to do re Tamoxifen and I believe you had an earlier question re a mastectomy. You need to put in the details of your illness before we can be able to help you.
Please fill in your information and then ask your questions and we'll be glad to help!
If you're having difficulty filling out the info and wish to chat with me privately, feel free to email me offsite.