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Arrowhead Pharmaceuticals Reports Topline Results from Phase 3 SHASTA-3 and SHASTA-4 Studies of Plozasiran in Patients with Severe Hypertriglyceridemia

$ARWRPress releaseJul 22, 2026, 7:30 AM ETRead the release

Arrowhead Pharmaceuticals reported positive topline results from the Phase 3 SHASTA-3 and SHASTA-4 studies of plozasiran in severe hypertriglyceridemia, achieving median triglyceride reductions of 79% and 81% respectively versus placebo. The studies met all primary and secondary endpoints, showing a statistically significant reduction in acute pancreatitis events, including a 100% reduction in high-risk patients, with no new safety signals observed.

Key figures

Drug Name
Plozasiran (REDEMPLO)
Phase Of Trial
Phase 3
Participants
approximately 750
Placebo reduction
approximately 27%
Regulatory filing plan
sNDA in the U.S. before the end of 2026
Ap events reduction high risk
100%
Triglyceride reduction shasta3
79%
Triglyceride reduction shasta4
81%
Ap events reduction broad population
78%

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