随着现代医药事业的不断发展和人们医药知识的不断提高,有些人愿意在家备一些常用药品,但这些药品一旦再用时,人们一定要注意该药品是否已过了规定的有效期。药品的“有效期”是指药品在一定贮存条件下能够保持质量的期限。有些稳定性较差的药品在贮存中,药效降低毒性增高,有的甚至不能使用。为了保证药品的安全有效,对这类药品必须制订有效期。 With the continuous development of modern medicine and people’s medical knowledge, some people are willing to prepare some commonly used medicines at home. However, once these medicines are reused, people must pay attention to whether the medicines have expired or not. The “expiration date” of a pharmaceutical product refers to the expiration date that the pharmaceutical product can maintain its quality under certain storage conditions. Some less stable drugs in storage, lower toxicity increased efficacy, and some can not even use. In order to ensure the safety and effectiveness of medicines, the expiration date must be set for such medicines.