IRCT20190128042520N5 IRCT 2024-01-26 Iran University of Medical Sciences Evaluation of Ursodeoxycholic acid effect on gallstone in pateint undergoing bariatric surgery Determination of effect of Ursodeoxycholic acid on gallstone in pateint undergoing bariatric surgery while having asymptomatic gallstone 2024-02-20 anticipated 60 Complete https://irct.ir/trial/75072 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: The randomization list including 60 patients is prepared using the four random blocks method. The randomization unit is individual and the randomization tool is PASS11 statistical software and is at the disposal of the statistical expert of the project (that is, the person who performs the patient allocation and in (patient assessment does not play a role). In addition to blinding, the preparation of the randomized list ensures concealment, Blinding description: In this study participant,radiologist(outcome evaluator) and principal researcher will be blind.Both intervention and control groups recieve completely identical tablets and they will not know about their groups. A radiologist who measures the size and number of Gallstones and principal researcher enters the results do not know about participant Group. 1 Morbid Obesity. Intervention 1: Intervention group: The group receiving the drug will receive UDCA capsules (Ursobil) made by the AANIDARMAN company with a dose of 300 mg every 12 hours for 6 months for free. Intervention 2: Control group: The control group also receives a placebo medicine with the same appearance as the original medicine every 12 hours for 6 months for free. No - There is not a plan to make this available Justification or reason for not sharing IPD is There is no more information