When dementia occurs in the elderly, there is a noticeable decline in cognitive function. Initially, it is important to identify the cause of the dementia; some cerebrovascular diseases can also cause dementia. For example, cerebral infarction in certain specific areas of the brain can lead to dementia if it affects the intelligence center. For dementia caused by these reasons, it is recommended to treat with antithrombotic medications, including antiplatelet aggregation drugs and brain cell protective medications. Additionally, if the dementia is caused by Alzheimer's disease, close care is needed to prevent incidents like the patient getting lost. It is advisable to write contact numbers in the pockets of their clothes and administer acetylcholinesterase inhibitors to increase the levels of acetylcholine in the brain, which can improve cognitive function to a certain extent. (Note: This answer is for reference only. Medication should be prescribed and managed under the guidance of a professional physician, and self-medication should be avoided.)