Olanzapine is indicated for the treatment of schizophrenia, moderate to severe manic episodes, and for the prevention of relapse in bipolar disorder (provided that treatment of the manic episode is effective). Olanzapine is an antipsychotic drug, clinically used in the treatment of schizophrenia, if the initial treatment is effective, it can be used for maintenance treatment, and the clinical effect is better, in addition, it can also be used for the treatment of moderate to severe manic episodes, and in the premise of effective treatment of manic episodes, used for the prevention of bipolar disorder relapse. Contraindications to olanzapine medication include patients who are allergic to the product and those with a known risk of narrow-angle glaucoma. Adverse effects such as drowsiness, dizziness, inability to sit still, increased appetite, and weight gain are the most common during treatment. Specific drug use should be under the supervision of a specialist.