Whether it is proprietary Chinese medicine or traditional Chinese medicine or western medicine, it cannot be taken orally after the expiration date, as follows: Firstly, the efficacy cannot be guaranteed, it is possible to eat a lot, but the condition has not improved in the slightest. Secondly, after eating expired pCms, there is a possibility of abdominal pain and diarrhea, mainly because pCms are relatively watery and prone to bacteria after expiration, which may cause acute enteritis after taking them. Expired pCms should not be taken orally, whether in terms of efficacy or otherwise. Expired pCms may appear white in appearance, may change in taste after oral consumption, and may even become moldy or spoiled.