Olanzapine does not seriously damage the nerves in the brain. Olanzapine is a new type of antipsychotic drug usually used to treat schizophrenia, organic psychiatric symptoms such as dementia and irritability. Its main mechanism of action is to antagonize dopamine, which can bind to dopamine receptors, 5-HT receptors and cholinergic receptors with antagonistic effects. Generally patients can relatively reduce and alleviate the symptoms of mispronunciation and restlessness after using olanzapine, and appropriate use will not seriously damage the nerves of the brain. However, as a psychotropic drug, it can have certain side effects. Common adverse reactions are drowsiness and weight gain, which can easily cause obesity and metabolic syndrome. For the adverse reactions of olanzapine, it is necessary to measure the patient’s blood glucose, blood fat and weight before taking olanzapine, and also check the patient’s blood glucose, blood fat, and measure the patient’s weight and blood pressure every three months after using the drug. In addition people must use the drug in combination with the clinical, to the doctor’s face-to-face guidance, to avoid overdose, and prohibit self-addition of drugs and dosage.