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Crinecerfont

Phase 3

Congenital Adrenal Hyperplasia | Small molecule | Endocrine |Neurocrine Biosciences, Inc.|Last Updated: Aug 28, 2026

Target and mechanism

Molecular targetCRHR1
Target classAntagonist
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials4
Total Enrollment312

FDA Designations

BREAKTHROUGH_THERAPYFAST_TRACKRARE_PEDIATRIC_DISEASEPRIORITY_REVIEWORPHAN_DRUG

Clinical trial landscape

Crinecerfont · 5 trials · 2 indications

Phase 3 2Phase 2 3
NCT04806451Global Safety and Efficacy Registration Study of Crinecerfont in Pediatric Participants With Classic Congenital Adrenal Hyperplasia (CAHtalyst Pediatric Study)Congenital Adrenal Hyperplasia
ACTIVE NOT_RECRUITING103 Analytics
NCT04490915Global Safety and Efficacy Registration Study of Crinecerfont for Congenital Adrenal HyperplasiaCongenital Adrenal Hyperplasia
ACTIVE NOT_RECRUITING182 Analytics
PHASE3ACTIVE NOT_RECRUITING
Global Safety and Efficacy Registration Study of Crinecerfont in Pediatric Participants With Classic Congenital Adrenal Hyperplasia (CAHtalyst Pediatric Study)
Congenital Adrenal HyperplasiaUnlock trial analytics
PHASE3ACTIVE NOT_RECRUITING
Global Safety and Efficacy Registration Study of Crinecerfont for Congenital Adrenal Hyperplasia
Congenital Adrenal HyperplasiaUnlock trial analytics

Study Endpoints

Primary Endpoints

Change From Baseline in Serum Androstenedione at Week 4
Baseline, Week 4

Blood serum samples were collected for the analysis of serum androstenedione concentrations. Least square (LS) mean and standard error (SE) were calculated using analysis of covariance (ANCOVA) model.

Percent Change From Baseline in Glucocorticoid Daily Dose at Week 24
Baseline, Week 24

Least square (LS) mean and standard error (SE) were calculated using analysis of covariance (ANCOVA) model.

Number of Participants With Treatment-emergent Adverse Events (TEAE)
Day 1 up to 28 weeks
Plasma Concentration of Crinecerfont
Days 7 and 15
Percent Change From Baseline to Day 14 in Serum 17-OHP Concentrations (Morning Window Average)
Baseline, Day 14

Percent changes in 17-OHP were assessed through the collection of samples from 0700 hours to 1000 hours (morning window) both prior to study drug administration (i.e., baseline) and after 14 days of study drug dosing. The 2 samples collected during this morning window at each visit were averaged and used to determine the percent change from baseline.

Secondary Endpoints

Change From Baseline in Serum 17-hydroxyprogesterone (17-OHP) at Week 4
Baseline, Week 4
Percent Change From Baseline in Glucocorticoid Daily Dose at Week 28
Baseline, Week 28
Number of Participants Who Achieved a Reduction to Physiologic Glucocorticoid Dose While Maintaining Androstenedione Control at Week 28
Week 28
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
CrinecerfontEXPERIMENTALCrinecerfont solution or capsule, administered orally, twice daily for 28 weeks during the placebo-controlled treatment period, followed by active treatment with crinecerfont for at least 24 weeks.
PlaceboPLACEBO_COMPARATORPlacebo solution or capsule, administered orally, twice daily for 28 weeks, followed by active treatment with crinecerfont for at least 24 weeks.
Crinecerfont 50 milligrams (mg) Twice Daily (BID)EXPERIMENTALCrinecerfont administered orally for 14 consecutive days.

Interventions

NameTypeDescription
CrinecerfontDRUGCRF type 1 receptor antagonist
PlaceboDRUGNon-active dosage form
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Eligibility Criteria

Age Range2 Years to 17 Years
SexALL
Healthy VolunteersNo
Study Sites46

Inclusion Criteria: * Be willing and able to adhere to the study procedures, including all requirements at the study center, and return for the follow-up visit. * Have a medically confirmed diagnosis of classic CAH due to 21-hydroxylase deficiency. * Be on a stable steroid regimen. * Have elevated ...

Countries:United StatesBelgiumCanadaFranceGermanyGreeceItalyPolandSpainUnited KingdomAustriaBulgariaCzechiaIsraelNetherlandsPortugalSerbiaSweden
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Recent Changes (Last 90 Days)

LOWAug 28, 2026NCT07187375lastUpdatePostDate: changed
LOWAug 28, 2026NCT07187375lastUpdatePostDate: changed
MEDIUMJun 16, 2026NCT07187375Status: RECRUITING → ACTIVE_NOT_RECRUITING
MEDIUMJun 16, 2026NCT07187375Status: RECRUITING → ACTIVE_NOT_RECRUITING
MEDIUMJun 16, 2026NCT07187375Status: RECRUITING → ACTIVE_NOT_RECRUITING

Frequently asked questions about Crinecerfont

What is Crinecerfont used for?

Crinecerfont is an investigational small molecule being developed for the treatment of Congenital Adrenal Hyperplasia (CAH), a group of inherited endocrine disorders. It is being studied in both adult and pediatric populations, including patients less than 2 years old, to address the underlying hormonal imbalances associated with the condition.

Who makes Crinecerfont?

Crinecerfont is being developed by Neurocrine Biosciences, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol NBIX. The company is conducting clinical trials to evaluate the safety and efficacy of this investigational drug for Congenital Adrenal Hyperplasia.

What phase is Crinecerfont in?

Crinecerfont is in Phase 2 and Phase 3 clinical trials. It has completed a Phase 2 study in pediatric participants and is currently in two Phase 3 registration studies for adults and children with Congenital Adrenal Hyperplasia. The drug is investigational and has not been approved by regulatory authorities.

What clinical trials is Crinecerfont in?

Crinecerfont is being studied in four clinical trials. These include NCT04045145 (completed Phase 2 in pediatrics), NCT04490915 (Phase 3 in adults), NCT04806451 (Phase 3 in pediatrics), and NCT07187375 (Phase 2 in children under 2 years old). All trials are evaluating the drug for Congenital Adrenal Hyperplasia.

What FDA designations has Crinecerfont received?

Crinecerfont has received several FDA designations, including Breakthrough Therapy, Fast Track, Rare Pediatric Disease, Priority Review, and Orphan Drug. These designations are intended to expedite the development and review of the drug for Congenital Adrenal Hyperplasia, reflecting the serious nature of the condition.

Is Crinecerfont the same as NBI-74788?

Yes, Crinecerfont is also known as NBI-74788. The completed Phase 2 trial NCT04045145 used the name NBI-74788 in its title, confirming that both names refer to the same investigational drug being developed by Neurocrine Biosciences for Congenital Adrenal Hyperplasia.