There are many reasons for vomiting in Alzheimer’s disease, such as digestive system diseases and medication can cause vomiting, which will bring negative impact to the patient’s health. 1. Digestive system diseases: If Alzheimer’s patients suffer from peptic ulcer, gastritis and other digestive system diseases, it will increase the burden on the stomach and intestines, affecting the normal digestive function, and then cause vomiting. 2. Pharmacological factors: because Alzheimer’s patients need to take donepezil hydrochloride, heavy tartaric acid carboplatin and other drugs for a long time, will produce gastrointestinal stimulation, will also cause vomiting, which need to be re-adjusted under the guidance of the doctor, but also to pay attention to the emergence of adverse reactions to the medication. We need to avoid the causes of Alzheimer’s vomiting in our lives, and we need to go to the hospital in time after the onset of the disease, but also with the appropriate care.