Like Vanessa said..Seroquel is an atypical antipyschotic..like Ablify, Geodon, etc. It's not meant as a sleep drug. Just happens to work as a mood stabilizer. It was only just approved for schizophrenia...not FDA approved as a mood stabilizer though all the pysch docs use it that way. I do however sleep 10 hrs. a night on the XR version. Been a lifesaver for me!