Hi Again. just went to the GI, and yes it's confirmed I have PBC. So far I drink 1000 mg of Urso but I was proscribed today Azathioprine 50 mg. But reading about it scares me. Has any body taken this. Is it safe?? It says it cause hepátic insuficiente. I don't know of I should take it. I am asymptomatic!!