机体对药物处置又称药物体内过程，包括机体对药物的吸收、分布、代谢和排泄四个方面。老年人随着年龄的增长，会伴有相应的器官、组织结构的退化，生理、生化功能的减退，自稳机制下降等。这些改变导致老年机体对药物处置能力的变化。老年人临床合理用药应当充分考虑老年人药 The body of drug treatment, also known as drug body processes, including the body’s absorption of drugs, distribution, metabolism and excretion in four areas. Elderly people with age, will be accompanied by the corresponding organ, the degradation of tissue structure, physiological, biochemical function decline, decreased self-stability mechanism. These changes lead to changes in the ability of older people to handle drugs. The rational use of drugs in the elderly should give full consideration to the elderly medicine