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zorevunersen

Phase 3

Dravet Syndrome | Small molecule | Neurology |Stoke Therapeutics, Inc.|Last Updated: Aug 24, 2026

Target and mechanism

Target class-Sen (Aso)
ModalitySmall molecule

Also known as zorevunersen (STK-001)

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindSHAM_CONTROLLEDDMC
Total Trials2
Total Enrollment230

FDA Designations

BREAKTHROUGH_THERAPYORPHAN_DRUGRARE_PEDIATRIC_DISEASE

Clinical trial landscape

zorevunersen · 2 trials · 1 indication

Phase 3 1Phase 2 1
NCT06872125A Double-blind Study Evaluating the Efficacy, Safety, and Tolerability of Zorevunersen in Patients With Dravet SyndromeDravet Syndrome
RECRUITING170 Analytics
PHASE3RECRUITING
A Double-blind Study Evaluating the Efficacy, Safety, and Tolerability of Zorevunersen in Patients With Dravet Syndrome
Dravet SyndromeUnlock trial analytics

Study Endpoints

Primary Endpoints

Measurement of Seizure Change
Week 28

Measured by daily seizure diary

Safety of multiple doses of zorevunersen
Screening (Day -1) until 6 months after multiple drug dosing

Safety variables for analysis include the incidence, type, severity, and seriousness of AEs, and changes in vital signs, ECG, laboratory, immunogenicity, physical examination, and outcomes on the cerebellar function clinical screening battery.

Secondary Endpoints

Measurement of Seizure Change
Week 52
Multi-component Vineland Adaptive Behavior Scales, Third Edition (Vineland-3) Outcome Score
Week 52
Vineland Adaptive Behavior Scales, Third Edition (Vineland-3) Subdomain Score
Week 52
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
ZorevunersenEXPERIMENTALEligible patients will be randomly assigned in a 1:1 ratio to zorevunersen:sham in Treatment Period 1 (approximately 52 weeks). Upon the completion of Treatment Period 1 all eligible patients, will enter Treatment Period 2 and receive zorevunersen, regardless of initial treatment assignment.
Sham ComparatorSHAM_COMPARATOREligible patients will be randomly assigned in a 1:1 ratio to zorevunersen:sham
zorevunersen (STK-001) multiple dose levelsEXPERIMENTALEnrollment of patients after completion of Study STK-001-DS-101 or Study STK-001-DS-102 if eligible. Patients will receive IT administration of study drug zorevunersen at the dose level they received while participating in Study STK-001-DS-101 or STK-001-DS-102, or at a dose level recommended by the Safety Monitoring Committee (SMC).The highest dose administered in this study may not exceed that which has already been evaluated in an zorevunersen Phase 1/2 study, and doses above 45 mg/dose in this study require approval from the Food and Drug Administration (FDA). Patients will initially receive 3 doses, one every approximately 4 months (16 weeks). Patients who are tolerating treatment may continue treatment with doses approximately every 4 months, with an End of Study/Follow-up Visit 24 weeks after the last dose of study drug. Patients who do not continue treatment after the third dose will have a Follow-up Visit (V5) at Week 48 and an End of Study Visit at Week 56.

Interventions

NameTypeDescription
zorevunersenDRUGTreatment Period 1: Zorevunersen group will receive study drug by intrathecal (IT) administration on Day 1 (after the 8-week Baseline Period), Day 57 (Week 8), Day 169 (Week 24), and Day 281 (Week 40) at a dose level of 70 mg on Day 1 and Day 57, and 45 mg on Day 169 and Day 281. Treatment Period 2: Group assigned to zorevunersen in Treatment Period 1 will receive 45 mg of zorevunersen on Day 393 (Week 56), Day 477 (Week 68), and Day 589 (Week 84).
Sham ComparatorOTHERTreatment Period 1: Sham group will not have drug administered. Sham group will have a procedure intended to mimic the drug administration. Treatment Period 2: Group assigned to sham in Treatment Period 1 will receive 70 mg of zorevunersen on Day 393 (Week 56) and on Day 477 (Week 68), and 45 mg of zorevunersen Day 589 (Week 84).
zorevunersen (STK-001)DRUGzorevunersen drug product is an antisense oligonucleotide administered as an intrathecal injection.
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Eligibility Criteria

Age Range2 Years to 17 Years
SexALL
Healthy VolunteersNo
Study Sites61

Key Inclusion Criteria: 1. Patients must be ≥2 and \<18 years of age. 2. Patients must have a clinical diagnosis of DS confirmed by the Epilepsy Study Consortium, Inc. (ESCI) and as defined by: Onset, prior to 12 months (inclusive, \<13 months), of age, of recurrent focal with motor signs, hemi...

Countries:United StatesChinaFranceGermanyItalyJapanSpainUnited Kingdom
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Recent Changes (Last 90 Days)

LOWAug 24, 2026NCT06872125lastUpdatePostDate: changed
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LOWAug 5, 2026NCT06872125lastUpdatePostDate: changed
LOWJul 2, 2026NCT06872125lastUpdatePostDate: changed
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Frequently asked questions about zorevunersen

What is zorevunersen used for?

Zorevunersen is an investigational antisense oligonucleotide (ASO) being developed for the treatment of Dravet Syndrome, a severe form of epilepsy that begins in infancy. It is currently in Phase 3 clinical development and has not been approved by the FDA. The drug is being studied in patients as young as 2 years old.

What does zorevunersen target?

Zorevunersen is an antisense oligonucleotide (ASO), a class of drugs that work by binding to RNA to modify gene expression. Its specific molecular target is not disclosed in the available information. The drug is being investigated for its ability to treat Dravet Syndrome, a genetic epilepsy disorder.

Who makes zorevunersen?

Zorevunersen is being developed by Stoke Therapeutics, Inc., a biopharmaceutical company traded on the Nasdaq under the ticker symbol STOK. The company is conducting clinical trials to evaluate the drug's safety and efficacy in patients with Dravet Syndrome.

What phase is zorevunersen in?

Zorevunersen is currently in Phase 3 clinical development. It is an investigational drug and has not been approved by the FDA. The drug has received Breakthrough Therapy, Orphan Drug, and Rare Pediatric Disease designations from the FDA for the treatment of Dravet Syndrome.

What clinical trials is zorevunersen in?

Zorevunersen is being studied in two active clinical trials. NCT04740476 is a Phase 2 open-label extension study in patients with Dravet Syndrome, enrolling 60 participants in the United States. NCT06872125 is a Phase 3 double-blind, sham-controlled study enrolling 170 participants across multiple countries including the United States, China, France, Germany, Italy, Japan, Spain, and the United Kingdom.

Is zorevunersen the same as STK-001?

Yes, zorevunersen is also known as STK-001. Both names refer to the same investigational antisense oligonucleotide being developed by Stoke Therapeutics for the treatment of Dravet Syndrome. The drug is currently in Phase 3 clinical trials and has not been approved by regulatory authorities.