老年人家里特别是慢性病患者,备存一点药是常有的事。但是药品怎样保管,怎样掌握药品的有效期,却为一些人所疏忽。有的老年人连过了有效期的药也舍不得丢,甚至还要继续服用。因此,我们要与大家共同来了解一下怎样认识药品的有效期和失效的问题。家里备存的一些药物,时间长了,难免有超过有效期的情况,也有因保存不当造成药品过早失效和损坏的。那么,该如何理解药品的有效期和失效呢? Elderly people, especially those with chronic diseases, keep a little medicine is a common occurrence. However, how to keep the medicine and how to control the expiration date of the medicine are neglected by some people. Some older people can not bear to lose even the expiration date of medicine, and even continue to take it. Therefore, we would like to work with all of you to understand how to know the expiration date and invalidation of medicines. Some medicines stored in the home for a long time will inevitably have more than the validity of the situation, but also due to improper storage of drugs caused by premature failure and damage. So, how to understand the validity and failure of the drug?