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REGN5713

Phase 3

Allergic Conjunctivitis | Small molecule | Ophthalmology |Regeneron Pharmaceuticals, Inc.|Trials Updated: Apr 21, 2026

REGN5713 development status

Highest phase Phase 3
Registered trials 4 across 1 sponsor since Jan 2021

REGN5713 target and mechanism

Molecular targetBetV1
Target classAllergen
ModalitySmall molecule

Also known as Bremzalerbart

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials3
Total Enrollment624

FDA Designations

No designations recorded

REGN5713 clinical trials

REGN5713 · 3 trials · 3 indications

Phase 3 2Phase 2 1
NCT06602739A Study to Demonstrate the Effect of REGN5713-5715 on Reducing Ocular Allergy Signs and Symptoms in Adult Participants With Birch Pollen AllergyAllergic Conjunctivitis
COMPLETED54 Analytics
NCT04709575Study to Assess the Efficacy of Anti-Bet v 1 Monoclonal Antibodies in Adults to Reduce Symptoms of Seasonal Allergic RhinitisAllergic Rhinitis
COMPLETED353 Analytics
PHASE3COMPLETED
A Study to Demonstrate the Effect of REGN5713-5715 on Reducing Ocular Allergy Signs and Symptoms in Adult Participants With Birch Pollen Allergy
Allergic ConjunctivitisUnlock trial analytics
PHASE3COMPLETED
Study to Assess the Efficacy of Anti-Bet v 1 Monoclonal Antibodies in Adults to Reduce Symptoms of Seasonal Allergic Rhinitis
Allergic RhinitisUnlock trial analytics

Study Endpoints

Primary Endpoints

Ocular itch score in response to birch allergen challenge
At Day 8 post-Conjunctival Allergen Challenge (CAC)

Assessed using the Ora Calibra® Conjunctival Allergen Challenge Ocular Itching Scale, a 0-4 point scale where 0 = none and 4= incapacitating itch, 0.5 unit increments

Combined Symptom and Medication Score (CSMS) in Participants Who Receive a Single Dose of REGN5713-5714-5715 Versus Placebo
Until the end of Birch Pollen Season, up to Week 16

The average CSMS will be calculated based on daily symptom score and daily medication score recorded over the duration of the birch pollen season (BPS). CSMS is calculated by adding the Daily Medication Score (DMS) and Total Symptom Score (TSS) together, with scores ranging between 0 (none) and 38 (severe).

Mean Total Nasal Symptom Score (TNSS) (2 to 6 Hours) During Out-of-season Birch Allergen Environmental Exposure Unit (EEU) Challenge (REGN5713-5714-5715 vs. Placebo) at Day 29
Day 29 from randomization (Out-of-season)

TNSS ranges from 0 (none) to 12 (severe): sum of 4 nasal symptoms (nasal congestion, itching, \& runny nose, \& sneezing) graded on a Likert scale ranging from 0 (none) to 3 (severe); Higher score indicates worse outcome.

Secondary Endpoints

Conjunctival redness score in response to birch allergen challenge
At Day 8 post-CAC
Percent change in birch titrated Skin Prick Test (tSPT) in response to birch allergen challenge
Baseline and at Day 8
Tearing score in response to birch allergen challenge
At Day 8 post-CAC
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
REGN5713-5715EXPERIMENTALParticipants will be randomized 1:1
PlaceboPLACEBO_COMPARATORParticipants will be randomized 1:1
REGN5713-5714-5715EXPERIMENTALREGN5713-5714-5715 administered subcutaneously
Placebo OnlyPLACEBO_COMPARATORPlacebo matching REGN5713-5714-5715 administered subcutaneously
REGN5715EXPERIMENTAL1-mAb
Matching PlaceboPLACEBO_COMPARATOR -

Interventions

NameTypeDescription
REGN5713DRUGAdministered per protocol
REGN5715DRUGAdministered per protocol
PlaceboDRUGAdministered per protocol
REGN5714DRUGAdministered subcutaneously
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites3

Key Inclusion Criteria: 1. Documented or participant-reported history of moderate to severe birch pollen allergy for at least 2 years with bothersome ocular symptoms during the birch season 2. Positive SPT to birch allergen extract, as described in the protocol 3. Positive allergen specific immunog...

Countries:United StatesCanadaBelgiumDenmarkGermany
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Frequently asked questions about REGN5713

What is REGN5713 used for?

REGN5713 is being developed for allergic conjunctivitis and allergic rhinitis, conditions triggered by exposure to birch pollen. It is an investigational therapy studied in adults with birch pollen allergy. Regeneron Pharmaceuticals is evaluating it in Phase 3 clinical development, with completed trials in the United States, Canada, and several European countries.

What does REGN5713 target?

REGN5713 targets Bet v 1 (BetV1), the major birch pollen allergen, which belongs to the allergen target class. By binding this allergen, the therapy is designed to reduce allergic rhinitis and conjunctivitis symptoms and skin test reactivity following birch allergen exposure. It is a small molecule administered subcutaneously in the clinical studies.

Who is developing REGN5713?

Regeneron Pharmaceuticals, Inc. (ticker: REGN) is developing REGN5713. The company has sponsored Phase 2 and Phase 3 trials of the candidate in adults with birch pollen allergy, evaluating its effect on allergic rhinitis and conjunctivitis symptoms.

What phase is REGN5713 in?

REGN5713 is in Phase 3 clinical development. It is investigational and has not been approved by the FDA. Regeneron has completed Phase 2 and Phase 3 studies of the candidate, including a Phase 3 trial in allergic conjunctivitis and a Phase 3 trial in seasonal allergic rhinitis.

What clinical trials is REGN5713 in?

REGN5713 has been studied in completed trials including NCT06602739, a Phase 3 study in adult participants with birch pollen allergy and allergic conjunctivitis, and NCT04709575, a Phase 3 study in adults with seasonal allergic rhinitis. A Phase 2 trial, NCT05430919, evaluated anti-Bet v 1 monoclonal antibodies in allergic rhinitis and conjunctivitis.

Is REGN5713 the same as REGN5713-5715?

REGN5713-5715 refers to the combination studied in the Phase 3 trial NCT06602739, which evaluated the effect of REGN5713-5715 on reducing ocular allergy signs and symptoms in adults with birch pollen allergy. REGN5713 is the anti-Bet v 1 antibody component referenced across the clinical program.