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Mirum Pharmaceuticals Announces Primary Endpoint Met in VISTAS Study of Volixibat in Patients with Primary Sclerosing Cholangitis

$MIRMPress releaseMay 4, 2026, 8:00 AM ETRead the release

Mirum Pharmaceuticals announced that the VISTAS Phase 2b study of volixibat in primary sclerosing cholangitis (PSC) met its primary endpoint, demonstrating a statistically significant reduction in pruritus. Treatment with volixibat resulted in a 2.72 point reduction from baseline on the Adult ItchRO scale, with a placebo-adjusted difference of 1.64 points (p<0.0001).

Key figures

Drug Name
Volixibat
Phase Of Trial
Phase 2b
P value
<0.0001
Total patients
158
Planned nda submission
second half of 2026
Primary cohort patients
111
Primary reduction points
-2.72
Placebo adjusted difference
-1.64

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