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VSA003

Phase 3

Homozygous Familial Hypercholesterolemia (HoFH) | Small molecule | Metabolic |Arrowhead Pharmaceuticals, Inc.|Trials Updated: Oct 6, 2026

VSA003 development status

Highest phase Phase 3
Registered trials 3 across 2 sponsors since May 2023

VSA003 target and mechanism

Molecular targetANGPTL3
ModalitySmall molecule

Also known as AROANG3, Zodasiran

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials4
Total Enrollment162

FDA Designations

No designations recorded

VSA003 clinical trials

VSA003 · 4 trials · 5 indications

Phase 3 3Phase 1 1
NCT07473843Study of Zodasiran in Adolescent Participants With Homozygous Familial HypercholesterolemiaHomozygous Familial Hypercholesterolemia
RECRUITING10 Analytics
NCT07037771A Phase 3 Study of Zodasiran in Adolescent and Adult Subjects With Homozygous Familial Hypercholesterolemia (YOSEMITE)Homozygous Familial Hypercholesterolemia
ACTIVE NOT_RECRUITING70 Analytics
NCT06712771A Phase 3 Clinical Trial to Evaluate the Efficacy and Safety of VSA003 in Chinese HoFH PatientsHomozygous Familial Hypercholesterolemia (HoFH)
ACTIVE NOT_RECRUITING46 Analytics
PHASE3RECRUITING
Study of Zodasiran in Adolescent Participants With Homozygous Familial Hypercholesterolemia
Homozygous Familial HypercholesterolemiaUnlock trial analytics
PHASE3ACTIVE NOT_RECRUITING
A Phase 3 Study of Zodasiran in Adolescent and Adult Subjects With Homozygous Familial Hypercholesterolemia (YOSEMITE)
Homozygous Familial HypercholesterolemiaUnlock trial analytics
PHASE3ACTIVE NOT_RECRUITING
A Phase 3 Clinical Trial to Evaluate the Efficacy and Safety of VSA003 in Chinese HoFH Patients
Homozygous Familial Hypercholesterolemia (HoFH)Unlock trial analytics

Study Endpoints

Primary Endpoints

Percent Change from Baseline to Month 12 in Fasting LDL-C
Baseline, Month 12
Percent Change from Baseline to Month 12 in Fasting Low Density Lipoprotein Cholesterol (LDL-C) (Randomized period)
Baseline, Month 12
Percent change from baseline in serum LDL-C at month 6
At month 6
Frequency and severity of adverse event (AE) and serious adverse event (SAE)
Up to 85±3 days post-dose

safety and tolerability

Secondary Endpoints

Percent Change from Baseline to Month 12 in Fasting Apolipoprotein B (ApoB)
Baseline, Month 12
Change from Baseline to Month 12 in Fasting ApoB
Baseline, Month 12
Percent Change from Baseline to Month 12 in Fasting Non-High Density Lipoprotein Cholesterol (non-HDL-C)
Baseline, Month 12
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
ZodasiranEXPERIMENTAL -
PlaceboPLACEBO_COMPARATORCalculated volume to match active treatment by sc injection (randomized period). 4 or 5 doses of zodasiran by sc injection (optional open-label period)
VSA003EXPERIMENTALsubcutaneous injections

Interventions

NameTypeDescription
ZodasiranDRUGBy sc injection
zodasiran InjectionDRUGARO-ANG3 Injection
PlaceboDRUGsterile normal saline (0.9% NaCl)
VSA003DRUGsubcutaneous injections
0.9% NaClDRUGplacebo
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Eligibility Criteria

Age Range12 Years to 17 Years
SexALL
Healthy VolunteersNo
Study Sites2

Inclusion Criteria: * Adolescents 12 to \<18 years of age who are nonpregnant, nonlactating, and do not plan to become pregnant during the study * Body weight ≥35 kilograms (kg) at screening * HoFH based on a supportive genetic test (from a source-verifiable medical record or based on screening gen...

Countries:United StatesDenmarkAustraliaAustriaBelgiumBrazilCanadaCzechiaFranceGeorgiaGermanyIsraelJapanNew ZealandSaudi ArabiaSouth AfricaSpainSwedenTurkey (Türkiye)China
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Recent Changes (Last 90 Days)

LOWOct 6, 2026NCT07473843Status: NOT_YET_RECRUITING → RECRUITING
LOWOct 6, 2026NCT07473843Status: NOT_YET_RECRUITING → RECRUITING
LOWSep 30, 2026NCT07473843Enrollment: 12 → 10
LOWSep 30, 2026NCT07473843Enrollment: 12 → 10
MEDIUMAug 12, 2026NCT07037771Status: RECRUITING → ACTIVE_NOT_RECRUITING
MEDIUMAug 12, 2026NCT07037771Status: RECRUITING → ACTIVE_NOT_RECRUITING

Frequently asked questions about VSA003

What is VSA003 used for?

VSA003 is an investigational drug being developed for dyslipidemias and homozygous familial hypercholesterolemia (HoFH), a rare genetic condition causing extremely high cholesterol. It is currently in clinical development and has not been approved by regulatory authorities.

What does VSA003 target?

VSA003 targets ANGPTL3, a protein that regulates lipid metabolism. By inhibiting ANGPTL3, the drug aims to reduce levels of cholesterol and triglycerides in the blood, which is relevant for treating dyslipidemias and HoFH.

Who is developing VSA003?

VSA003 is being developed by Arrowhead Pharmaceuticals, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker ARWR. The company is conducting clinical trials for this drug in patients with lipid disorders.

What phase is VSA003 in?

VSA003 is in Phase 1 clinical development. A Phase 1 study in healthy volunteers has been completed, and a Phase 3 trial in HoFH patients is active but not yet recruiting. The drug is investigational and not yet approved.

What clinical trials is VSA003 in?

VSA003 has two clinical trials. NCT05851066 is a completed Phase 1 study in healthy volunteers in China. NCT06712771 is an active Phase 3 trial in Chinese HoFH patients, with an enrollment target of 46 participants.

Is VSA003 the same as any other drug?

No alternative names for VSA003 have been reported. The drug is identified solely by its code name VSA003 in clinical trial registrations and company communications.