Alzheimer’s disease is generally defined as Alzheimer’s disease with a disease duration of 5-10 years, with a few patients surviving longer. Alzheimer’s disease can occur in old age and pre-mature old age and is a degenerative disease of the nervous system characterized by progressive progressively worsening and irreversible memory impairment, cognitive dysfunction and mental behavior abnormalities. Memory loss can occur in the early stages, mainly in the near-term memory, forgetting what has just been said or done, but the distant memory is relatively preserved; while the memory loss is aggravated, cognitive dysfunction can occur, i.e., the daily familiar things cannot be completed successfully; at the same time, more obvious behavioral and psychiatric abnormalities, such as easy to lose temper, silent, etc., and in severe cases, patients can In severe cases, patients may be bedridden due to lifelong speechlessness and loss of motor function, which may lead to death from complications such as pulmonary infections, urinary tract infections and bed sores, or death from complications of other systemic diseases. Most patients with Alzheimer’s disease usually survive from 5 to 10 years after definitive diagnosis, with only a small percentage of patients exceeding 10 years. Patients with Alzheimer’s disease can extend their lives and improve their quality of life by taking oral medications, creating a safe and comfortable environment, and providing effective care.