Pills can also have a negative affect on people, too. Anti-Depressants forgeted me up worse when I needed to take them. I hate the things.
Bipolar disorder is a genetic one, so if someone in your family has it, it's more likely.On the other hand, you may just be a gigantic friend who's hoping to explain his douchebaggery through a "i just can't help it" disorder. You can hope, right?