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Quetiapine (/kwÉ¨ËtaÉª.ÉpiËn/ kwi-TY-É-peen) (developed and marketed as Seroquel by AstraZeneca) is an atypical antipsychotic approved for the treatment of schizophrenia, bipolar disorder, and along with an antidepressant to treat major depressive disorder.he sustained-release quetiapine is marketed mainly as Seroquel XR. Other marketing names are Seroquel Prolong, Seroquel Depot and Seroquel XL. On May 18, 2007, AstraZeneca announced that the U.S. FDA approved Seroquel XR for acute treatment of schizophrenia.
Seroquel is used to treat schizophrenia and bipolar disorder (both bipolar depression and manic episodes). It is used for improving symptoms of these mental illnesses and preventing relapses (worsening of the conditions). On occasion, healthcare providers may also recommend Seroquel for treating something other than the conditions mentioned above. This is called an  off-label  use.