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Vixarelimab

Phase 2

Prurigo Nodularis | Small molecule | Dermatology |Kiniksa Pharmaceuticals International, plc|Last Updated: Jan 13, 2026

Success Probability

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment240

FDA Designations

No designations recorded

Clinical trial landscape

Vixarelimab · 1 trial · 2 indications

Phase 2 1
NCT03816891Study to Assess the Efficacy, Safety, and Tolerability of Vixarelimab in Reducing Pruritus in Prurigo NodularisPrurigo Nodularis
COMPLETED240 Analytics
PHASE2COMPLETED
Study to Assess the Efficacy, Safety, and Tolerability of Vixarelimab in Reducing Pruritus in Prurigo Nodularis
Prurigo NodularisUnlock trial analytics

Study Endpoints

Primary Endpoints

Phase 2a & 2b: Percent Change From Baseline in Weekly Average Worst Itch-Numeric Rating Scale (WI-NRS) Score
at Week 8 (Phase 2a); at Week 16 (Phase 2b)

Participants rated pruritus daily on the Worst Itch \[pruritis\] Numeric Rating Scale (WI-NRS: 0=no pruritus; 10=worst imaginable pruritus). The least squares mean (LSM) and LSM difference were rounded up or down to the nearest single decimal place.

Secondary Endpoints

Phase 2a: Percentage of Participants Achieving at Least a 4-point Reduction From Baseline in Weekly Average WI-NRS at Week 8
Baseline, Week 8
Phase 2a: Percent Change From Baseline in Pruritus Visual Analog Scale (VAS) at Week 8
Baseline, Week 8
Phase 2a: Change From Baseline in Weekly Average of WI-NRS Over Time
Baseline, Weeks 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Phase 2a - Vixarelimab 360 mg SC Weekly (QW)EXPERIMENTALVixarelimab 720 mg loading dose followed by 360 mg weekly for 8 weeks (Protocol Version 3) or 16 weeks (Protocol Version 2)
Phase 2a - Placebo SC QWPLACEBO_COMPARATORPlacebo loading dose followed by placebo weekly for 8 weeks (Protocol Version 3) or 16 weeks (Protocol Version 2)
Phase 2b - Vixarelimab 540 mg SC Every 4 Weeks (Q4W; DBL)EXPERIMENTALVixarelimab 540 mg SC, every 4 weeks (Q4W) for 16 weeks during Double Blind Period
Phase 2b - Vixarelimab 360 mg SC, Q4W (DBL)EXPERIMENTALVixarelimab 360 mg SC, every 4 weeks (Q4W) for 16 weeks during Double Blind Period
Phase 2b - Vixarelimab 120 mg SC, Q4W (DBL)EXPERIMENTALVixarelimab 120 mg SC, every 4 weeks (Q4W) for 16 weeks during Double Blind Period
Phase 2b - Placebo SC, Q4W (DBL)PLACEBO_COMPARATORPlacebo SC, every 4 weeks (Q4W) for 16 weeks during Double Blind Period
Phase 2b - Vixarelimab 360 mg SC, Every 2 Weeks (Q2W; OLE)EXPERIMENTALVixarelimab 360 mg SC, every 2 weeks for 36 weeks during Open Label Extension

Interventions

NameTypeDescription
VixarelimabDRUGsolution for injection
PlaceboDRUGsolution for injection
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Eligibility Criteria

Age Range18 Years to 80 Years
SexALL
Healthy VolunteersNo
Study Sites86

Inclusion Criteria (apply to both Phase 2a and Phase 2b unless otherwise specified): 1. Male or female aged 18 to 75 years (Phase 2a), 18 to 80 years (Phase 2b) 2. Have clinical diagnosis of prurigo nodularis for at least 6 months 3. Have at least 10 nodules (Phase 2a), 20 nodules (Phase 2b) at the...

Countries:United StatesAustraliaAustriaBelgiumCanadaCzechiaFranceGermanyItalyPolandSouth KoreaTaiwanUnited Kingdom
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Frequently asked questions about Vixarelimab

What is Vixarelimab used for?

Vixarelimab is an investigational drug being studied for the treatment of prurigo nodularis, a skin condition characterized by intense itching and nodular lesions. It is being evaluated for its ability to reduce pruritus, or itching, in patients with this condition. The drug is currently in clinical development and is not yet approved.

Who makes Vixarelimab?

Vixarelimab is being developed by Kiniksa Pharmaceuticals International, plc, a biopharmaceutical company traded on the Nasdaq under the ticker symbol KNSA. The company is conducting clinical trials to evaluate the drug's efficacy and safety in patients with prurigo nodularis.

What phase is Vixarelimab in?

Vixarelimab is in Phase 2 clinical development. It has completed a Phase 2 trial, which was a randomized, double-blind, placebo-controlled study involving 240 participants with prurigo nodularis. The drug remains investigational and has not received regulatory approval.

What clinical trials is Vixarelimab in?

Vixarelimab has been studied in one completed Phase 2 clinical trial, identified as NCT03816891. This trial assessed the efficacy, safety, and tolerability of Vixarelimab in reducing pruritus in patients with prurigo nodularis. The study enrolled 240 participants across multiple countries, including the United States, Australia, and several European and Asian nations.

Is Vixarelimab FDA approved?

Vixarelimab is not FDA approved. It is an investigational drug currently in clinical development for prurigo nodularis. The drug has completed a Phase 2 trial, but it has not yet received regulatory approval from the FDA or any other health authority.