Post 3 in this sticky has information about Bipolar Disorder:
http://www.gaiaonline.com/guilds/viewtopic.php?t=1450215I have a friend who was in a relationship with her now-ex, and he was depressed, bisexual, and just not very mentally stable. They were together for over 2 years, and he became very abusive towards the end. Eventually, he learned the hard way that because he wasn't willing to change himself, and he was blaming everyone else for his problems, he lost the person he supposedly cared about.
My point is, it's up to him to change himself. You can't help him much past giving support, and you can't control him.
If you do decide to leave him, then you should explain to him why. I think it would be fair to the both of you and definitely understandable if you were to tell him that you don't want to be with him until he's "better". Otherwise to stay in a relationship where you're not very happy and you're stressed all the time is not fair to you, and it's probably not beneficial to either one of you if you're both not happy.
Please don't feel guilty for asking him to see the doctor. It's not like you could've looked into the future and seen that the pills would give him the reaction they did. All he/you can do now is tell doctors in the future that Prozac-based medication doesn't work with his body and that he has a negative reaction to it. Maybe doctors can try finding another medication that might work for him?