insomnia
"I've had sleep issues my whole life and had just sort of dealt with it.  I finally spoke with a Dr. about it and was prescribed Lunesta.  Over a couple of weeks, taking it ~3 nights a week, I was sleeping better for the most part. Then, my emotions started going haywire.  I was quick to anger and feeling paranoid.  I was convinced my wife was having an affair (she wasn't) and had multiple outbursts.  I have never been on any sort of medication for a period of time, so I didn't think to blame the Lunesta.  I stopped taking it and the crazy emotions have stopped."