Taking olanzapine for a long period of time as prescribed by your doctor may cause adverse effects such as drowsiness, weight gain, and dizziness, and long-term overdose of olanzapine can cause adverse effects such as tachycardia, convulsions, and even coma. Olanzapine can be used to treat a variety of disorders such as schizophrenia, bipolar disorder and mania. Adverse effects include drowsiness, weight gain, dizziness, fatigue, dry mouth, and constipation. This product is contraindicated in patients who are hypersensitive to the product and the ingredients contained in it, and in patients with a known risk of narrow-angle glaucoma. It is not suitable for pregnant and lactating women, children under 18 years of age. If patients change the dosage on their own resulting in long-term overdose of olanzapine, it will cause significant stimulation of the nerves, causing patients to experience a variety of symptoms such as tachycardia, convulsions, coma and even respiratory depression, etc. There is no specific antidote for this drug, and the impact on the body is more serious. Patients should follow the doctor’s instructions to take olanzapine, which will help to realize the efficacy of the drug.