As Soupe pointed out, bipolar disorder probably exists on a spectrum as far as symptoms & severity go. In recent years, I've had good luck working with my pdoc to minimize the number & amounts of meds I'm on. I take a relatively high dose of Depakote (mood stabilier), Trazodone (a mild AD & sleep aid) & have Klonopin for anxiety. I went off my anti-psychotic & AD, but have a supply both if my behavior or moods get out of hand....my partner has seen me get in a bad way, so she knows the signs. Anyways, that's just me. Your mileage may vary...

As has been noted already, I think bipolar disorder is especially notable for the longevity & severity of symptoms. I can still get elated for no reason, but as long as things don't get out of proportion, it's all good. When such a mood lasts weeks or months, however, it's time to act.