Olanzapine is an antipsychotic drug, which should not be discontinued suddenly. Sudden discontinuation of olanzapine will lead to the following consequences: 1. It will lead to withdrawal syndrome. Patients who discontinue olanzapine will show some symptoms of phytodysfunction, such as panic, hand trembling, difficulty in breathing, sweating, as well as anxiety, restlessness, depression, and some even induce delirium, etc. This is a withdrawal syndrome caused by withdrawal. 2. If there are psychiatric symptoms, such as hallucinations and delusions, then it will lead to a rebound of psychiatric symptoms, which obviously leads to aggravation of the disease. Therefore, olanzapine must be taken under the guidance of a doctor, and the drug must be discontinued slowly only after assessing the stability of the disease, not suddenly.