hey david.
my wife was in your situation with me ove ten yrs ago. i'm not sure, but i would bet my bottom bippie (if any of you are old enough to remember rowan and martin's "laugh in" - where goldie hawn got her start - if you're old enough to remeber her ) that your wife's behavour is a symptom of her bp. i am basing this entirely on my wife and my experience. i have also read that any unusual (not "normal" for the individual) is a symptom.
if i were you i would make an appointment with your wife's pdoc and explain the situation to the pdoc. tell him/her what you have told us. i would suspect that the problem is in your wife's meds. prozac, from what i understand, is not usually rxed for bp. it sounds like your wife needs a mood stabelizer rather than - or in addition to - an anti-depressant.
hope this helps. stay in touch.
warren