As seen on TV:
An advertisement for Evista, which is an osteoporosis medication targeting post-menopausal women (POST, as in already been there and done that), warns the following..
"Do not take Evista if you are pregnant or nursing, or may become pregnant."
Umm... if you are post-menopausal aren't you guaranteed not to have to worry about such things any more?
I'm just sayin'...