I have been on Tamoxifen for 2 1/2 yrs. and have been participating in a study. So they will change me to the study drug Exemestane this month and I haven't heard a lot about it. Has anyone taken this drug and what side effects have you had? Tamoxifen has givien me awful hot flashes!! So, I am hoping the study drug doesn't do that, but I understand I will have to worry about bone loss and will be put on a once a month pill for that. I am so tired of all the pills I am on now. Am anxious to hear from someone who has taken this drug. Thanks