Are between 18 to 75 years old
Have a confirmed diagnosis of PSC for at least 6 months
Have taken PSC medication and are on a stable dosage for at least 12 weeks
Have high alkaline phosphatase (ALP) blood levels. “High” can be defined at 1.5 times the upper limits of normal (ULN)
For patients with inflammatory bowel disease (IBD)*, it must be mild or in remission