There is no predisposition to vomiting in Alzheimer’s disease. If Alzheimer’s disease has the symptom of vomiting, it is mainly considered to be related to drug factors, gastrointestinal diseases, high blood pressure and other factors. 1. Drugs: Alzheimer’s patients can experience vomiting if they use improper medications that cause irritation to the gastric mucosa, such as azithromycin, ibuprofen, etc. The symptoms can disappear after stopping the medication. Symptoms can disappear after stopping the drug. 2. Gastrointestinal diseases: Alzheimer’s patients are prone to gastroparesis due to poor gastrointestinal peristalsis, which is prone to abdominal distension, vomiting and other symptoms. Oral domperidone, cisapride and other drugs to increase gastric power as prescribed by the doctor. 3. Hypertension: when there is a hypertensive emergency resulting in cerebral edema, patients will have headache, nausea, vomiting symptoms, should immediately go to the hospital emergency room, given mannitol, furosemide and other drugs to reduce cerebral edema, sodium nitroprusside, uradil and other drugs to adjust blood pressure. Alzheimer’s disease vomiting needs to be treated under the guidance of a doctor to clarify the cause of the disease.