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REGN13335

Phase 2

Pulmonary Arterial Hypertension (PAH) | Small molecule | Cardiovascular |Regeneron Pharmaceuticals, Inc.|Last Updated: Aug 19, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment99

FDA Designations

No designations recorded

Clinical trial landscape

REGN13335 · 2 trials · 2 indications

Phase 2 1Phase 1 1
NCT07318597Study of REGN13335 in Adult Participants With Pulmonary Arterial Hypertension (PAH)Pulmonary Arterial Hypertension (PAH)
RECRUITING99 Analytics
PHASE2RECRUITING
Study of REGN13335 in Adult Participants With Pulmonary Arterial Hypertension (PAH)
Pulmonary Arterial Hypertension (PAH)Unlock trial analytics

Study Endpoints

Primary Endpoints

Change from baseline in Pulmonary Vascular Resistance (PVR)
At week 24
Incidence of treatment emergent adverse events (TEAE's) through the end of the study (EOS) visit
Baseline to day 113
Severity of TEAE's through the EOS visit
Baseline to day 113

Secondary Endpoints

Occurrence of Treatment-Emergent Adverse Events (TEAEs)
Through end of study, up to approximately 2.5 years
Severity of TEAEs
Through end of study, up to approximately 2.5 years
Change from baseline in circulating N-Terminal pro-B-type Natriuretic Peptide (NT-proBNP) concentrations
At week 24
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
DBTP-Arm1EXPERIMENTAL -
DBTP-Arm2EXPERIMENTAL -
DBTP-Arm3PLACEBO_COMPARATOR -
OLE-Arm1EXPERIMENTAL -
OLE-Arm2EXPERIMENTAL -
IV Cohort 1 Low DoseEXPERIMENTALRandomized as described in the protocol
IV Cohort 2 Mid DoseEXPERIMENTALRandomized as described in the protocol
IV Cohort 3 High DoseEXPERIMENTALRandomized as described in the protocol
IV Cohort 4 Higher DoseEXPERIMENTALRandomized as described in the protocol
IV Cohort 5 Highest DoseEXPERIMENTALRandomized as described in the protocol
SC Cohort 1 Low DoseEXPERIMENTALRandomized as described in the protocol
SC Cohort 2 High DoseEXPERIMENTALRandomized as described in the protocol
IV or SC Optional CohortEXPERIMENTAL≤ Highest IV or SC Dose as described in the protocol Randomized as described in the protocol

Interventions

NameTypeDescription
REGN13335DRUGAdministered per the protocol
PlaceboDRUGAdministered per the protocol
Matching PlaceboDRUGAdministered IV or SC, sequential ascending single dose
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites27

Key Inclusion Criteria: 1. Documented clinical diagnosis of PAH (Group 1 PH according to the 7th World Symposium on Pulmonary Hypertension (WSPH)) 2. WHO functional class II or III (slight to marked limitation of functional status due to PAH) 3. Receiving background Standard Of Care (SOC) therapy f...

Countries:United StatesAustraliaBelgiumFranceGermanyLatviaPolandSouth KoreaSpainUnited KingdomNew Zealand
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Recent Changes (Last 90 Days)

LOWAug 20, 2026NCT07318597lastUpdatePostDate: changed
LOWAug 20, 2026NCT07318597lastUpdatePostDate: changed
LOWAug 20, 2026NCT07318597lastUpdatePostDate: changed
LOWAug 20, 2026NCT07318597lastUpdatePostDate: changed
LOWAug 5, 2026NCT07318597lastUpdatePostDate: changed
LOWJul 27, 2026NCT07318597lastUpdatePostDate: changed
LOWJul 27, 2026NCT07318597lastUpdatePostDate: changed
LOWJul 27, 2026NCT07318597lastUpdatePostDate: changed
LOWJul 14, 2026NCT07318597lastUpdatePostDate: changed
LOWJul 14, 2026NCT07318597lastUpdatePostDate: changed
LOWJun 22, 2026NCT07318597lastUpdatePostDate: changed
LOWJun 22, 2026NCT07318597lastUpdatePostDate: changed

Frequently asked questions about REGN13335

What is REGN13335 used for?

REGN13335 is an investigational small molecule being developed by Regeneron Pharmaceuticals for the treatment of Pulmonary Arterial Hypertension (PAH). It is also being studied in healthy volunteers to assess its safety and tolerability. The drug is administered either intravenously or subcutaneously and is currently in clinical development.

How does REGN13335 work?

REGN13335 is a small molecule therapeutic being developed by Regeneron Pharmaceuticals for Pulmonary Arterial Hypertension (PAH). The specific molecular target of REGN13335 has not been disclosed in available information. The drug is administered intravenously or subcutaneously and is currently being evaluated in clinical trials.

Who makes REGN13335?

REGN13335 is developed by Regeneron Pharmaceuticals, Inc., a biopharmaceutical company traded on NASDAQ under the ticker REGN. The company is conducting clinical trials to evaluate the drug's safety and efficacy in healthy volunteers and in patients with Pulmonary Arterial Hypertension (PAH).

What phase is REGN13335 in?

REGN13335 is in Phase 1 and Phase 2 clinical development. A Phase 1 study in healthy volunteers has been completed, and a Phase 2 study in patients with Pulmonary Arterial Hypertension (PAH) is currently recruiting participants. The drug is investigational and has not been approved by regulatory authorities.

What clinical trials is REGN13335 in?

REGN13335 is being studied in two clinical trials. NCT06137482 is a completed Phase 1 study in healthy volunteers in New Zealand. NCT07318597 is a recruiting Phase 2 study in patients with Pulmonary Arterial Hypertension (PAH) across multiple countries, including the United States, Australia, and several European and Asian nations.

Is REGN13335 the same as any other drug?

REGN13335 is the sole name provided for this investigational drug developed by Regeneron Pharmaceuticals. No alternative names or aliases have been associated with REGN13335 in the available information. It is being studied for Pulmonary Arterial Hypertension (PAH) and in healthy volunteers.