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Mirum Pharmaceuticals Announces Primary Endpoint Met in Phase 3 EXPAND Study of LIVMARLI® (maralixibat) in Ultra-Rare Cholestatic Liver Diseases

$MIRMPress releaseOct 12, 2026, 8:00 AM ETRead the release

Mirum Pharmaceuticals announced that the Phase 3 EXPAND study of LIVMARLI (maralixibat) met its primary endpoint, showing a statistically significant reduction in cholestatic pruritus versus placebo (p=0.0004) in patients with ultra-rare cholestatic liver diseases. Maralixibat also produced a 69% reduction in serum bile acids versus placebo, and results were significant across all five prespecified secondary endpoints, including in the biliary atresia with native liver subgroup. The 52-patient study showed no new safety signals. Mirum plans a U.S.

Key figures

Drug Name
LIVMARLI (maralixibat)
Phase Of Trial
Phase 3
Patients enrolled
52
Sba treatment effect
69.0% reduction vs placebo (p<0.0001)
Secondary endpoints met
5
Primary endpoint p value
0.0004
Biliary atresia itch p value
0.0002

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