Find patient medical information for Quetiapine (Seroquel) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Quetiapine is used to treat schizophrenia (a mental illness that affects how a person thinks, feels and behaves), bipolar disorder (a disease that causes depression, mania, and other abnormal moods) and major depressive disorder. Quetiapine is in a class of medications called atypical antipsychotics. It works by changing the activity of certain natural substances in the brain. Quetiapine (Seroquel) is an antipsychotic that treats schizophrenia and bipolar disorder. It balances dopamine and serotonin in your brain. Seroquel is a prescription tablet used to treat bipolar I disorder and certain other mental health conditions. Learn about its dosage, side effects, and more. Find information to better understand major depressive disorder (MDD), bipolar disorder, bipolar depression, and SEROQUEL XR® (quetiapine). Description Quetiapine is used alone or together with other medicines to treat bipolar disorder (depressive and manic episodes) and schizophrenia. Quetiapine extended-release tablet is also used together with other antidepressants to treat major depressive disorder. This medicine should not be used to treat behavioral problems in older adult patients who have dementia or Alzheimer disease. Seroquel is used to treat the symptoms of schizophrenia, bipolar disorder and major depressive disorder. Learn about side effects, interactions and indications. Quetiapine is an atypical antipsychotic used to treat schizophrenia, bipolar disorder, and major depression by balancing brain chemicals linked to mood and behavior. Seroquel (quetiapine) is used to treat bipolar disorder, depression and schizophrenia. Learn side effects, dosage, drug interactions, warnings, patient labeling, reviews, and more. Quetiapine (/ kwɪˈtaɪ.əpiːn / kwi-TY-ə-peen), sold under the brand name Seroquel among others, is an atypical antipsychotic medication used in the treatment of schizophrenia, bipolar disorder, and major depressive disorder. [10][11] Despite being widely prescribed as a sleep aid due to its tranquillizing effects, the benefits of such use.