bipolar disorde
"I was prescribed risperidone for bipolar. It had the bonus side effect that it cured my lifelong non-stop painful bleeding fingernail biting. It also reduced my anxiety otherwise in the day and at night; I don't get overly excited about little things (good or bad), and I sleep 10 hours without waking every hour as before. I wish I could sleep less though. I am slow, naturally, to get things done, so losing 2-4 hours of awake time makes me noticeably less productive."