After taking expired drugs, the efficacy of the drugs will be reduced in the less severe cases, and in the more severe cases, toxic side effects as well as allergies may occur. Expired drugs can not be taken, if the drug has just expired, the efficacy of the drug can not be guaranteed, the use of the efficacy of the situation may be reduced, so that the condition can not get the correct treatment. If the expiration date is longer, the drug may also be deteriorated, at this time to take not only can not be treated, but also may appear toxic side effects, increase the chances of allergies. Before taking the drug should check the shelf life of the drug in detail, for the expiration date and the expiration date of the drug should be properly disposed of, to prevent the occurrence of accidental ingestion, if you take the expired drugs appear to be unwell, should go to the hospital in a timely manner to receive treatment, so as not to cause serious consequences.