Is it all that common to be on meds for bipolar and to still go thru manic and depressive episodes? I've read a few posts here where some people seems to be going thru this. Some are on a lot of different kinds of meds at the same time. I guess I would like to understand how one can still have an episode while on so many meds. Do you develope a tolerance for the meds? What happens? I'm trying to understand these things as I have a SIL who suffers from bipolar and I want to learn as much as I can so I understand her better.

Thank you.