Expired Niu Huang Pills can not be eaten, the drug may have deterioration, not only affect the efficacy of the drug, but also may damage your health. The main ingredients of Niu Huang Pills are ox huang, artificial musk, buffalo horn concentrated powder, pearl, cinnabar, andrographis paniculata, etc. Its effect is to clear heat and detoxification (clearing the body of heat and toxicity), suppressing fright and opening up the orifices. It is mainly used for the treatment of fever, evil into the pericardium, high fever convulsions (convulsions due to high fever), delirium tremens (delirium, babbling) and other conditions. When Niuhuang Pills appear to be expired, it can not be eaten, due to the expiration of the drug components may be deteriorated, not only affect the efficacy of the drug, but also may have side effects on the body, or even toxicity, seriously endangering the health of patients. Adverse reactions caused by the use of this product mercury nephrotoxicity, allergic reactions and body temperature does not rise and other symptoms, the use of this drug should be contraindicated for those who are allergic to the ingredients of Niu Huang Pills. Other contraindications and adverse reactions are not clear. Note that pregnant women should not take. It is recommended that patients need to replace the expired Niu Huang Pills in a timely manner, if you need to take medication, please go to the hospital and take medication under the guidance of a doctor to avoid unauthorized use of medication.