insomnia
"No real side effects other than sleepiness -- but since it's been prescribed to me for insomnia, that's kind of a bonus.  It wears off by the time it's time to start my day and I go about with a clear head.  It also seems to help abate some of my OCD rampant obsessive thought cycles.  I take it in tandem with Lexapro, Wellbutrin and klonopin."