I'm not sure how I would handle former supervisors. Did you leave that job on good terms? I know they did have questions about my mental health on a questionnaire they sent to a friend. She was honest and said that yes, I had a history of mental illness but that I was currently stable.

All you can do is be honest. If you're not, and they find out, that constitutes fraud and you can be prosecuted. It would be good to make sure your former supervisors have a clear understanding of why you behaved the way you did when you were manic and that it is an illness that you are being treated for. Other than that, it's out of your hands.

I hope it all goes well for you.