There are many Chinese patent medicines containing mercury, such as Niuhuang Qingxin Pill, Niuhuang Baolong Pill, Zhusha Pill, Angong Niuhuang Pill, Compound Aloe Capsule, Ginseng Zaizao Pill and Tianwang Buxin Pill. These drugs contain mercury, which is easy to cause mercury poisoning when taken in large doses for a long time. The digestive system is characterized by nausea and vomiting, abdominal pain and diarrhea, metallic taste in the mouth and salivation. The urinary system is characterized by oliguria and proteinuria, and acute renal failure may occur in severe cases.