Q. I've been on tamoxifen for a couple of years, and now my
doctor is switching me to an aromatase inhibitor. I understand how tamoxifen
works, but this AI is a whole new thing... how does it work?
A. Aromatase inhibitors (pronounced aroma-tase: just like it looks) come in three basic flavors: Femara® (letrozole), Arimidex® (anastrozole), and Aromasin® (exemestane). They're all known as third-generation AIs, meaning they're the third round of this type of drug to be developed-and the...