Tamoxifen
"I am 41 years old and like many who have already posted, wished the doctors would just be more up front regarding the side effects.  I think it would be more manageable, as sometimes I think I am crazy.  I have had peeling of my hands, foot swelling,  foot pain, decreased sex drive, fatigue, and yeast infections.  I have taken Tamoxifen for 2 years and am on the 10 year study.  My children are my motivation for taking this medicine."