Your doctor would know best, but my doctor provided recent research that showed that while tamoxifen is great, aromatase inhibitors are slightly better for postmenopausal women as well as women with suppressed (or removed) ovaries.

Blood clots are not a possible side effect of arimidex .

I've read that Tamoxifen is for premenopausal women Arimidix for post menopausal.

Arimidex or the other aromatase inhibitors.
http://www.asco.org/press-center/asco-guideline...