Could you tell me how long it takes ursodeoxycholic acid to work when you have obstetric cholestasis?

3 weeks : If you take 1gr. A day, usually start working after 3 weeks, improving pruritus, bilirubin and enzymes. Right indication and close follow up necessary. No indicated in the severe acute cholecystitis/cholelithiasis event were surgery may be indicated in the emergency setting. Consult high risk OB and possibly gen surgeon and even anesthesiologist.