Yusifu is the trade name of Ursodeoxycholic Acid Capsules, and is used orally at a dose of 10mg/kg per day for the treatment of gallstones and cholestatic liver disease, and one capsule (250mg) once a day for the treatment of bile reflux gastritis, the exact dosage of which should be followed by a doctor’s prescription. Ursodeoxycholic acid capsule is mostly used in the treatment of gallbladder cholesterol stones (X-ray penetrable and normal gallbladder contraction function), cholestatic liver disease, bile reflux gastritis. Instructions for the treatment of gallbladder cholesterol stones and cholestatic liver disease, according to the daily dose of 10mg / kg, in which patients with gallstones at night, cholestatic liver disease patients divided into the morning, noon and night to give drugs for stone dissolving treatment generally need 6 ~ 24 months, if the drug after 12 months of stone did not become smaller, the drug should be discontinued, and follow the doctor’s instructions to adjust the treatment program. The instructions state that in the treatment of bile reflux gastritis, the drug should be taken at night before bedtime, one capsule (250mg) once a day, usually for 10 to 14 days, the specific dosage and duration of time should be in accordance with the doctor’s instructions. It should be noted that ursodeoxycholic acid capsule is forbidden to be used by those who are allergic to any components of the drug, those who suffer from frequent biliary colic, those with impaired gallbladder function, those whose gallbladder cannot be seen by X-ray, those whose gallstones are calcified and cannot be penetrated by the radiation, those with biliary obstruction, and those who suffer from acute cholecystitis and cholangitis, and some patients may experience gastrointestinal disorders and allergic reactions during the use of the drug. Patients should follow the doctor’s instructions to take medication, not blindly use their own medication, so as not to affect the condition.