Hi, BPII sufferer here and was taking Wellbutrin SR 300mg a day for a week. Hands down the [best] drug I have ever taken before. Unfortunately, I lost weight on Wellbutrin, which isn't good if you're already underweight. Also my concentration increased on Wellbutrin, and I felt clear from foggy thoughts. Didn't seem to interfere w/ my mood swings, but I felt pleasant all the time, and not a hypomanic feeling.

Never been on hydroxyzine, so I can't help you there. Sorry. Hope I was of some help!