Expired drugs should never be taken because they have an expiration date. The expiration date is the period that can guarantee the quality of the drug under proper storage conditions, once it expires, its efficacy will be reduced or deterioration will occur, making the drug less effective or toxic reactions. Some drugs are more stable in nature and may not change much after the expiration date, but in order to use them, they need to be retested and qualified by the drug testing department to determine whether the drug can continue to be used, otherwise they cannot be used. In the storage of drugs, must be stored according to the requirements of the instructions, or even if the expiration date has not arrived, the drug may have deteriorated. Therefore, expired drugs should not be taken, and care should be taken to properly store the drugs as required to prevent expiration and delayed treatment of the condition.