The approximate number of days an elderly person can live without eating or drinking and sleeping cannot be determined and is related to the condition and treatment. Although the patient is unable to eat on his/her own, he/she may be able to survive for a longer period of time if he/she is intubated with a gastrostomy tube and under intensive care. Elderly people who do not eat or drink and are lethargic are considered to be in the end stage of life or suffering from cerebrovascular diseases such as cerebral infarction and cerebral hemorrhage. If brain stem hemorrhage occurs, the risk of death is very high. Sleeping due to pulmonary encephalopathy or hepatic encephalopathy is less likely to awaken. Due to malignant tumors and other diseases caused by the terminal stage, often the patient has been in a serious malignant state, do not eat or drink can be appropriate infusion to give supplemental amino acids or fat milk, to prolong the patient’s life. Nasogastric nutrition can also be given to replenish energy. When you find that the old man does not eat or drink, presenting a lethargic state, it is recommended that you can consult the internal medicine doctor of the regular hospital.