Ursodeoxycholic acid is generally recommended daily dose for adults is 13~15mg/kg, usually divided into 2~4 times, children oral recommended daily 8~10mg/kg. with food, the process of taking, need to adjust the dosage according to the patient’s individual situation. 1. Adults should take it correctly (1) Bile reflux gastritis: Generally, 250mg per day is required, to be taken at night before going to bed. (2) Gallstones and bile duct stones: Generally, 450~600mg per day should be taken for a minimum period of 6 months, twice in the morning and twice in the evening; if there is no improvement in ultrasonography and cholecystography after 6 months, the drug should be stopped; if the stones have been partially dissolved, it is necessary to continue to take the drug until the stones are completely dissolved. 2. The correct way to take the medicine for children When children take Ursodeoxycholic acid for treatment, they are required to take 8~10mg/kg per day in 2~3 times. Ursodeoxycholic acid must be under the guidance of a physician or pharmacist to choose the appropriate dosage and usage of the drug, which is conducive to the recovery of the disease. Do not blindly self-medicate.