The patient can not take expired drugs, the body will produce a lot of harm, roughly the following aspects: 1, taking expired drugs may lead to aggravation of the disease, such as expired antibiotics after taking not only can not play the role of anti-infection, but may lead to the spread of infection and the formation of abscesses and even sepsis. 2, after taking expired drugs did not achieve a good effect, thus making the disease continue to aggravate, such as hypertensive patients taking expired antihypertensive drugs, or diabetic patients taking expired hypoglycemic drugs may lead to increased blood pressure, blood sugar. For example, if hypertensive patients take expired antihypertensive drugs, or diabetic patients take expired hypoglycemic drugs, it may lead to increase of blood pressure and blood sugar. 3, taking expired other drugs, such as taking expired anti-tumor drugs, may cause tumor not controlled and recurrence and metastasis leading to death. Therefore, through the above analysis, expired drugs cannot be taken, and may even lead to toxic reactions and liver function damage, kidney function damage, etc.