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ARO-HSD

Phase 1

Non-alcoholic Steatohepatitis | Small molecule | Infectious Disease |Arrowhead Pharmaceuticals, Inc.|Last Updated: Oct 3, 2025

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment50
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT04202354Study of ARO-HSD in Healthy Volunteers and Patients With Non-Alcoholic Steatohepatitis (NASH) or Suspected NASHPHASE1 COMPLETED 50Mar 3, 2020Sep 3, 2021Oct 3, 20251 New Zealand
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Study Endpoints
Primary Endpoints
Number of Participants With Treatment-Emergent Adverse Events (TEAEs) Possibly or Probably Related to Treatment
From first dose of study drug through Day 113 (±5 days)

Adverse event (AE)=any untoward medical occurrence that does not necessarily have to have a causal relationship with this treatment. TEAEs=AEs with onset after administration of the study drug, or when a pre-existing medical condition increases in severity or frequency after study drug administration. Serious adverse event (SAE)= an AE that results in death; is life-threatening; requires inpatient hospitalization or prolongation of an existing hospitalization; results in persistent or significant disability/incapacity; is a congenital anomaly/birth defect; is a medically important event or reaction.

Secondary Endpoints
Pharmacokinetics (PK) of ARO-HSD: Plasma Concentrations
Normal Healthy Volunteers: Day 1: 2 hours pre-dose, 15 minutes, 30 minutes, 1, 2, 4, 8, 12, 18, 24; Day 2: 48 hours post-dose, Days 8, 15, 29. NASH Participants: Day 1: 2 hours pre-dose, 30 minutes, 1, 2, 24, hours post-dose, Days 8, 15, 29
PK of ARO-HSD in Normal Healthy Volunteers: Maximum Observed Plasma Concentration (Cmax)
Day 1: Predose, 15 minutes, 30 minutes, 1, 2, 4, 8 12, 18, 24, 48 hours postdose
PK of ARO-HSD in Normal Healthy Volunteers: Time to Reach Cmax (Tmax)
Day 1: Predose, 15 minutes, 30 minutes, 1, 2, 4, 8 12, 18, 24, 48 hours postdose
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Cohort 1: ARO-HSD 25 mgEXPERIMENTALNormal healthy volunteers randomized to double blind ARO-HSD 25 mg on Day 1 only.
Cohort 1: PlaceboPLACEBO_COMPARATORNormal healthy volunteers randomized to double blind placebo on Day 1 only.
Cohort 2: ARO-HSD 50 mgEXPERIMENTALNormal healthy volunteers randomized to double blind ARO-HSD 50 mg on Day 1 only.
Cohort 2: PlaceboPLACEBO_COMPARATORNormal healthy volunteers randomized to double blind placebo on Day 1 only.
Cohort 3: ARO-HSD 100 mgEXPERIMENTALNormal healthy volunteers randomized to double blind ARO-HSD 100 mg on Day 1 only.
Cohort 3: PlaceboPLACEBO_COMPARATORNormal healthy volunteers randomized to double blind placebo on Day 1 only.
Cohort 4: ARO-HSD 200 mgEXPERIMENTALNormal healthy volunteers randomized to double blind ARO-HSD 200 mg on Day 1 only.
Cohort 4: PlaceboPLACEBO_COMPARATORNormal healthy volunteers randomized to double blind placebo on Day 1 only.
Cohort 1b: ARO-HSD 25 mgEXPERIMENTALParticipants with suspected non-alcoholic steatohepatitis (NASH) receive open-label ARO-HSD 25 mg on Days 1 and 29.
Cohort 3b: ARO-HSD 100 mgEXPERIMENTALParticipants with suspected NASH receive open-label ARO-HSD 100 mg on Days 1 and 29.
Cohort 4b: ARO-HSD 200 mgEXPERIMENTALParticipants with suspected NASH receive open-label ARO-HSD 200 mg on Days 1 and 29.
Interventions
NameTypeDescription
ARO-HSD InjectionDRUGsingle or multiple doses of ARO-HSD by subcutaneous (sc) injections
sterile normal saline (0.9% NaCl)DRUGcalculated volume to match active treatment, by sc injection
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Eligibility Criteria
Age Range19 Years — 65 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: * Women of child bearing potential must have a negative pregnancy test, cannot be breastfeeding and must be willing to use contraception * Willing to provide written informed consent and to comply with study requirements * On a stable diet for at least 4 weeks with no plans to s...

Countries:New Zealand
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