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REGN13335

Phase 2

Pulmonary Arterial Hypertension (PAH) | Small molecule | Cardiovascular |Regeneron Pharmaceuticals, Inc.|Last Updated: Jul 14, 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 Sites20

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)
LOWJul 14, 2026NCT07318597lastUpdatePostDate: changed
LOWJul 14, 2026NCT07318597lastUpdatePostDate: changed
LOWJun 22, 2026NCT07318597lastUpdatePostDate: changed
LOWJun 22, 2026NCT07318597lastUpdatePostDate: changed
LOWMay 29, 2026NCT07318597primaryCompletionDate: changed
LOWMay 29, 2026NCT07318597primaryCompletionDate: changed
LOWMay 29, 2026NCT07318597primaryCompletionDate: changed
LOWMay 26, 2026NCT07318597Status: NOT_YET_RECRUITING → RECRUITING
LOWMay 24, 2026NCT07318597studyFirstPostDate: changed