防治和诊断药品的供需具有连续性和不确定性,库存药品过期不可避免。根据有关资料统计,我国每年的过期药品总量高达1.5吨,其中医院的过期药品不在少数[1]。大量过期药品的报损处理直接给国家造成了巨大的经济损失,而且进行回收处理也会耗费大量成本。因此,合理管理药库既要减少库存,又要保证药品满足临床用药的需求,还要避免 Prevention and treatment of drug supply and demand with continuity and uncertainty, stock drugs expire inevitable. According to the statistics, the total amount of expired drugs in our country is as high as 1.5 tons per year, among which there are not many expired drugs in hospitals [1]. Reported loss of a large number of expired drugs directly to the country caused huge economic losses, but also for recycling will cost a lot of costs. Therefore, the rational management of the drugstore not only needs to reduce the inventory, but also ensure that the drug meets the need of clinical medication, but also avoids