Ummm...you said he's not seen a Pdoc *psychiatrist* yet, who diagnosed him BiPolar and rx'd him meds? If it wasn't a pdoc that may be the problem, and if it is and his meds and such, or even his diagnosis is wrong the pdoc should be able to get things adjusted so that he's doing better. I'd be patient until you see the pdoc in a few days. Reg. docs arent' nuts about rx'ing benzo's for long amt's of time because of the addiction/dependency factor. If the anxiety is a serious factor then the pdoc should address it and put him on meds that are for that, there is a med without being a benzo, it's called Buspar and it works pretty well controlling buspar all day everyday, and you don't have the dependcy factor, that's just my opinion of course.
Good luck with the pdoc appt.