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Nirogacestat Hydrobromide

Phase 2

Desmoid Fibromatosis | Small molecule | Other |SpringWorks Therapeutics, Inc.|Last Updated: Jul 30, 2026

Target and mechanism

Molecular targetAPH1A, PSENEN, APH1B, PSEN1, NCSTN, PSEN2
Target classInhibitor
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment31

FDA Designations

PRIORITY_REVIEWFAST_TRACKORPHAN_DRUGBREAKTHROUGH_THERAPY

Clinical trial landscape

Nirogacestat Hydrobromide · 1 trial · 3 indications

Phase 2 1
NCT04195399A Study of a New Drug, Nirogacestat, for Treating Desmoid Tumors That Cannot be Removed by SurgeryDesmoid Fibromatosis
ACTIVE NOT_RECRUITING31 Analytics
PHASE2ACTIVE NOT_RECRUITING
A Study of a New Drug, Nirogacestat, for Treating Desmoid Tumors That Cannot be Removed by Surgery
Desmoid FibromatosisUnlock trial analytics

Study Endpoints

Primary Endpoints

Progression-free survival (PFS)
From initiation of treatment to occurrence of disease progression or death from any cause, assessed up to 2 years

Will be estimated using the Kaplan-Meier method with the 95% confidence interval estimated by the Peto-Peto method.

Incidence of adverse events
Up to 2 years

Will be graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events version 5.0. All grade 3 or above toxicities deemed related to study drug will be summarized. All grade 1 and 2 toxicities observed in \> 5% of participants and deemed related to study drug will be reported.

Pharmacokinetic (PK) parameter: systemic exposure
Up to Cycle 3 (each cycle lasts 28 days)

PK parameters of nirogacestat will be defined to quantify systemic exposure, drug clearance, terminal half-life and other pharmacokinetic characteristics. These PK parameters will be summarized with descriptive statistics, including means, medians, ranges, and standard deviations.

PK parameter: drug clearance
Up to Cycle 3 (each cycle lasts 28 days)

PK parameters of nirogacestat will be defined to quantify systemic exposure, drug clearance, terminal half-life and other pharmacokinetic characteristics. These PK parameters will be summarized with descriptive statistics, including means, medians, ranges, and standard deviations.

PK parameter: half-life
Up to Cycle 3 (each cycle lasts 28 days)

PK parameters of nirogacestat will be defined to quantify systemic exposure, drug clearance, terminal half-life and other pharmacokinetic characteristics. These PK parameters will be summarized with descriptive statistics, including means, medians, ranges, and standard deviations.

Secondary Endpoints

Objective response rate
Up to 24 months
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Treatment (nirogacestat)EXPERIMENTALPatients receive nirogacestat PO BID on days 1-28. Cycles repeats every 28 days in the absence of disease progression or unacceptable toxicity. Patients undergo ECHO and CT or MRI on study. Patients may also undergo x-ray imaging and blood sample collection on study.

Interventions

NameTypeDescription
Biospecimen CollectionPROCEDUREUndergo blood sample collection
Computed TomographyPROCEDUREUndergo CT
Echocardiography TestPROCEDUREUndergo ECHO
Magnetic Resonance ImagingPROCEDUREUndergo MRI
Nirogacestat HydrobromideDRUGGiven PO
Quality-of-Life AssessmentOTHERAncillary studies
Questionnaire AdministrationOTHERAncillary studies
X-Ray ImagingPROCEDUREUndergo x-ray
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Eligibility Criteria

Age Range12 Months to 18 Years
SexALL
Healthy VolunteersNo
Study Sites98

Inclusion Criteria: * Patients must be \> 12 months and \< 18 years of age at the time of enrollment * Patients must have a body surface area of \> 0.3 m\^2 at the time of enrollment * Existing or recurrent desmoid tumor that is deemed not amenable to surgery without significant morbidity and progr...

Countries:United StatesAustraliaCanadaNew ZealandPuerto Rico
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Recent Changes (Last 90 Days)

MEDIUMJul 30, 2026NCT04195399Completion: 2027-04-10 → 2032-12-31
MEDIUMJul 30, 2026NCT04195399Completion: 2027-04-10 → 2032-12-31
LOWMay 26, 2026NCT04195399primaryCompletionDate: changed
LOWMay 24, 2026NCT04195399studyFirstPostDate: changed

Frequently asked questions about Nirogacestat Hydrobromide

What is Nirogacestat Hydrobromide used for?

Nirogacestat Hydrobromide is an investigational small molecule being developed for the treatment of desmoid fibromatosis, including recurrent and unresectable desmoid tumors. It is currently in Phase 2 clinical development and has not been approved by the FDA.

What does Nirogacestat Hydrobromide target?

Nirogacestat Hydrobromide is an inhibitor that targets multiple components of the gamma-secretase complex, including APH1A, PSENEN, APH1B, PSEN1, NCSTN, and PSEN2. By inhibiting these targets, it is being studied for its potential effect on desmoid fibromatosis.

Who makes Nirogacestat Hydrobromide?

Nirogacestat Hydrobromide is being developed by SpringWorks Therapeutics, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol SWTX.

What phase is Nirogacestat Hydrobromide in?

Nirogacestat Hydrobromide is currently in Phase 2 clinical development. It has received several FDA designations, including Priority Review, Fast Track, Orphan Drug, and Breakthrough Therapy, but it remains investigational and is not yet FDA approved.

What clinical trials is Nirogacestat Hydrobromide in?

Nirogacestat Hydrobromide is being studied in a Phase 2 clinical trial with the identifier NCT04195399. This trial is active but not recruiting, with an enrollment of 31 participants, and is evaluating the drug for treating desmoid tumors that cannot be removed by surgery.