Dementia in the elderly has a very noticeable high incidence trend worldwide and in China, with many people over the age of 65 suffering from this disease. Statistics show that in Western countries, the incidence of dementia in the elderly might be around 3%-8%. In China, the incidence among the elderly over 65 may also be around 5%. Therefore, the number of elderly people suffering from this disease is very large, and thus it is essential to pay attention to this disease. This disease is mainly caused by the death of nerve cells due to many reasons. Currently, there is no effective cure for this disease, but there are some drugs that can alleviate the symptoms. These drugs mainly include cholinesterase inhibitors, which can increase the content of acetylcholine in the brain, improving the level of cognitive function in patients. Additionally, symptomatic treatment should be noted to prevent lung infections, malnutrition, and other complications in the elderly.