任何物质都会发生变化,药品也不例外。为了保证药品使用的安全和有效,对一些药品有贮存条件和有效期限的要求。特别是抗生素、抗癌药、酶类制剂和生物制品等,放置到一定期限就可出现效价减低或无效,如果把变质药品用于人体,就容易贻误病情。因此,到达失效期的药品,不能再继续使用。 Anything changes, medicines are no exception. In order to ensure the safe and effective use of medicines, some medicines have storage requirements and expiration dates. In particular, antibiotics, anticancer drugs, enzyme preparations and biological products, placed in a period of time there may be reduced potency or null and void, if the deterioration of drugs used in the human body, it is easy to delaying the disease. Therefore, to reach the expiration date of the drug, can not continue to use.