The medicine expired three months can not be eaten. The expiration date of the drug is more than the shelf life of the drug, after taking not only difficult to achieve the original therapeutic effect, and may even be more likely to cause allergic reactions to drugs, toxic side effects affecting the health of the body. Such as cephalosporin and other antibiotics, the efficacy of the drug decreases faster, patients may be difficult to achieve the original therapeutic effect after taking, aggravating the condition. Such as injections, such as injections, beyond the shelf life is prone to toxic side effects, endangering health. Therefore, although adverse reactions do not necessarily appear, but it is recommended that patients for safety reasons, even if the appearance of the drug has not seen obvious changes, should still avoid using expired drugs, so as not to delay the condition, or even aggravate the development of the disease.