The alanine aminotransferase 87U/L is considered to be a mild abnormality of liver function, which may be caused by drugs, hepatitis, cholecystitis and other factors, and is generally not serious. 1. Drug factors: Normal alanine aminotransferase is 5~40U/L in men and 5~35U/L in women, if the patient’s alanine aminotransferase is 87U/L, which is abnormally high, it may be due to the use of hepatotoxic drugs, such as chlorpromazine, rifampicin, isoniazid, etc. Usually, after stopping the use of drugs, its value will drop by itself. Generally, after stopping the medication, the value will decrease by itself, and it is not serious. 2. Hepatitis: AST 87U/L may also be caused by hepatitis. Early hepatitis is usually asymptomatic, and nausea, loss of appetite, abdominal distension, itching, etc. may occur. Most patients have a better prognosis after standardized treatment. 3. Cholecystitis: AST 87U/L is also considered to be caused by cholecystitis. Patients with cholecystitis may present with right upper abdominal cramps, high fever, jaundice, nausea, vomiting, etc. Most of the patients have a better prognosis and it is not a serious condition. If the patient has the condition of 87U/L, it is recommended to go to the regular hospital, identify the cause of the disease under the guidance of a professional physician, and have the condition evaluated by the professional physician, and actively cooperate with the doctor to take appropriate treatment measures.