Olanzapine tablets belong to antipsychotics, which can be used for the treatment of schizophrenia and moderate and severe manic episodes, and the prevention of relapse of bipolar disorder. Olanzapine tablets are new antipsychotics with pharmacological effects on a variety of receptor systems, such as D2 receptors, 5-HT2A receptors, 5-HT2C receptors, etc. They can be used for the treatment of schizophrenia and moderate and severe manic episodes. It can be used to prevent relapse of bipolar disorder in patients with manic episodes who are effectively treated with olanzapine. Common side effects after taking olanzapine tablets include drowsiness, weight gain, dizziness, weakness, inability to sit still, increased appetite, peripheral edema, upright hypotension, dry mouth and constipation. Tachycardia, aggressive behavior, dysarthria, dementia, seizures, and coma may occur with overdose. Olanzapine is contraindicated in people who are allergic to any of the components of the drug, who are at risk of narrow-angle glaucoma. Olanzapine needs to be used under the supervision of a medical professional and self-medication should be avoided.