This medication is a combination of 2 drugs, olanzapine (an antipsychotic drug) and fluoxetine (a selective serotonin reuptake inhibitor-SSRI). It is used to treat a certain type of mental/mood disorder (depression associated with bipolar disorder). It is also used to treat depression that has not responded to other medications. This medication may help you sleep, improve your mood, improve your concentration, and decrease nervousness. It works by helping to restore the balance of certain natural substances in the brain (neurotransmitters). Talk to the doctor about the risks and benefits of treatment (especially when used in teenagers). See also Precautions section.