Seroquel is an atypical antipsychotic used in the treatment of schizophrenia, bipolar I mania and depression, bipolar II depression, and used off-label for a variety of other purposes, including insomnia and anxiety disorders. Honestly...all it did to me was knock me out the first time...for 16 hours...make me feel like a freaking zombie...then the second time ...a panic attack...because my blood pressure dropped suddenly..and i got scared.