Mirum Stock Jumps After Volixibat Trial Win Puts First PSC Itch Drug Within Reach
FOSTER CITY, California, May 4, 2026, 13:04 PDT Shares of Mirum Pharmaceuticals surged Monday, after the company announced its experimental therapy volixibat hit the primary endpoint in a Phase 2b study targeting primary sclerosing cholangitis, or PSC—a rare liver condition marked by scarring of the bile ducts and potential liver failure. The study zeroed in on cholestatic pruritus, the intense itching caused by impaired bile flow and notorious as one of PSC’s toughest symptoms.