Hi @mayo101, I moved your question about taking tamoxifen after preventative double mastectomy for LCIS to this existing discussion:

– LCIS: should I take Tamoxifen? https://connect.mayoclinic.org/discussion/lcis-should-i-take-tamoxifen/

I did this to connect you with other members who also faced this decision like @nycoceans @cindylb @sparklegram @betsyk @batm @lisman1408 and others.

This is a great companion discussion to the earlier, related discussion you started here to help you decide on mastectomy:
- LCIS what treatments did you choose? https://connect.mayoclinic.org/discussion/lcis-and-double-mastectomy/

Keep in mind that everyone reacts differently and not everyone has side effects. Are you concerned about potential side effects? If I recall, you are in your early 50s. Does your oncologist feel that because of your age, tamoxifen reduces your risk of recurrence?