Banlangen can’t be drunk three months after the expiration date. The expiration date of the drug will have a certain reduction in efficacy, if you continue to take the drug will sometimes delay the condition, the drug can not achieve the effect of treatment. Seriously, it will also delay the condition, leading to further development of the disease, taking expired drugs is not conducive to the recovery of the disease. Expired drugs will sometimes be spoiled, mold and so on. If you continue to take sometimes also lead to diarrhea, abdominal pain, stomach pain, poisoning and other side effects, so expired drugs can not be taken. Expired drugs can sometimes lead to an increase in drug toxicity. If you continue to take it sometimes there will be other side effects on the body such as liver and kidney damage, expired drugs are not recommended to continue to take.