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CRN04894

Phase 3

Undisclosed | Small molecule | Other |Crinetics Pharmaceuticals, Inc.|Trials Updated: Oct 16, 2026

CRN04894 development status

Highest phase Phase 3 (NCT07144163)
Phase scored for CRNXPhase 1
Registered trials 5 across 1 sponsor since Apr 2023

CRN04894 target and mechanism

Molecular targetACTH
Target classHormone
ModalitySmall molecule

Also known as CRN04894 Oral Solution, Atumelnant

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindCONTROLLED
Total Trials6
Total Enrollment648

FDA Designations

No designations recorded

CRN04894 clinical trials

CRN04894 · 6 trials · 6 indications

Phase 3 1Phase 2 3Phase 1 2
NCT07144163A Study to Evaluate Atumelnant in Adults With Congenital Adrenal HyperplasiaCongenital Adrenal Hyperplasia
RECRUITING150 Analytics
PHASE3RECRUITING
A Study to Evaluate Atumelnant in Adults With Congenital Adrenal Hyperplasia
Congenital Adrenal HyperplasiaUnlock trial analytics

Study Endpoints

Primary Endpoints

Proportion of participants with morning post-GC A4 ≤ ULN who are on physiologic GC replacement.
Week 32
Change from baseline in morning serum androstenedione (A4) (Part A)
Week 8
Percent change from baseline in glucocorticoid (GC) daily dose while serum early morning A4 ≤Upper Limit of Normal (ULN) (Part B)
Week 28
Change from baseline in serum early morning A4 over time (Part C)
Up to Week 260
Incidence of treatment-emergent adverse events (TEAEs), including treatment-emergent serious adverse events (SAEs), adverse events of special interest (AESI [adrenal insufficiency]) and any adverse events (AEs) leading to discontinuation
Week 108
Incidence of glucocorticoid (GC) deficiency / adrenal insufficiency and adrenal crisis
Week 108
Incidence of hospitalizations related to congenital adrenal hyperplasia (CAH)
Week 108
Change from baseline in morning (before 11:00 AM) serum androstenedione (A4) over time
Week 108
Change From Baseline in Morning (Before 11:00) Serum Androstenedione (A4) PM Dosing
Baseline and Week 12

A4 is the principal biochemical measure of disease activity in adult CAH. Blood samples were collected for the measurement of serum concentration of A4 prior to glucocorticoid administration. Baseline is defined as the last non-missing morning window value prior to or on the same day as the first dose date of atumelnant. Change from baseline was obtained by subtracting post-baseline visit value minus baseline value.

Change From Baseline in Morning (Before 11:00) Serum Androstenedione (A4) AM Dosing
Baseline and Week 12

A4 is the principal biochemical measure of disease activity in adult CAH. Blood samples were collected for the measurement of serum concentration of A4 prior to glucocorticoid administration. Baseline is defined as the last non-missing morning window value prior to or on the same day as the first dose date of atumelnant. Change from baseline was obtained by subtracting post-baseline visit value minus baseline value.

Number of Participants Reporting of Treatment-emergent Adverse Events (TEAEs), Serious TEAEs, and Adverse Events Leading to Discontinuation Throughout the Study
From Day 1 to Up to Week 16 (End of study)

An adverse event (AE) is defined as any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether considered related to the study intervention or not. TEAEs were collected in the full analysis set which consisted of all participants who received at least one dose of study drug. A serious AE is defined by its severe clinical consequences: it is any event that results in death, is life-threatening, requires inpatient hospitalization, results in persistent disability, or requires medical intervention to prevent these outcomes.

Proportion of participants with treatment emergent adverse events (TEAEs)
Up to Day 15
Proportion of participants with adrenal insufficiency
Up to Day 15
Proportion of participants with safety findings determined by laboratory testing
Up to Day 15
Assessment of the maximum observed plasma concentration of CRN04894
Up to Day 15
Assessment of the time to achieve maximum observed plasma concentration of CRN04894
Up to Day 15
Assessment of the plasma area under the curve of CRN04894
Up to Day 15
Percentage of subjects with treatment-emergent adverse events
Part 1 - up to Day 8; Part 2 - up to Day 20
Proportion of participants with a clinically significant safety laboratory observation
Part 1 - up to Day 8; Part 2 - up to Day 20

Secondary Endpoints

Percent change from baseline of morning pre-GC A4
Week 2
Percent change from baseline of morning pre-GC 17-OHP
Week 32
Proportion of participants with morning pre-GC A4 ≤ ULN who are on physiologic GC replacement
Week 32
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
TreatmentEXPERIMENTALAtumelnant tablet, administered orally, once daily for 32 weeks.
PlaceboPLACEBO_COMPARATORMatching placebo, administered orally, once daily for 32 weeks.
Treatment (Part A)EXPERIMENTALOpen-label, semi-sequential cohorts.
Active Treatment (Part B)EXPERIMENTALRandomized, Parallel Arms, Double-Blind
Placebo (Part B)PLACEBO_COMPARATORRandomized, Parallel Arms, Double-Blind
Open-Label Treatment (Part C)EXPERIMENTALOpen-label treatment period for participants entering Part C from Part A and B.
Sequential DoseEXPERIMENTALSequential, open-label, 12-week fixed-dose cohorts.
Multiple Ascending DosesEXPERIMENTALSequential, open-label, 10-day or 14-day fixed-dose cohorts.
Single Ascending Dose (Part 1)EXPERIMENTAL -
Multiple Ascending Dose (Part 2)EXPERIMENTAL -

Interventions

NameTypeDescription
AtumelnantDRUGAtumelnant, tablets, once daily by mouth
PlaceboDRUGPlacebo, tablets, once daily by mouth
atumelnant (CRN04894)DRUGAtumelnant is an orally active nonpeptide melanocortin 2 receptor (MC2R) or adrenocorticotropic hormone (ACTH) receptor antagonist.
CRN04894 Oral SolutionDRUGCRN04894 is an orally active nonpeptide melanocortin 2 receptor (MC2R) or adrenocorticotropic hormone (ACTH) antagonist.
Placebo Oral SolutionDRUGPlacebo
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Eligibility Criteria

Age Range18 Years to 74 Years
SexALL
Healthy VolunteersNo
Study Sites75

Inclusion Criteria: 1. Male or female, between ≥18 to \<75 years of age at the time of signing the ICF. 2. Willing and able to understand and adhere to the study procedures as specified in the protocol and comply with the study treatment. 3. Have classic CAH due to 21-OHD confirmed by the Investiga...

Countries:United StatesArgentinaAustraliaAustriaBrazilCanadaFranceGermanyItalyJapanNetherlandsPolandSaudi ArabiaSwedenUnited KingdomBelgiumChileIndia
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Recent Changes (Last 90 Days)

LOWOct 16, 2026NCT07144163lastUpdatePostDate: changed
LOWOct 16, 2026NCT07159841lastUpdatePostDate: changed
LOWOct 16, 2026NCT07144163lastUpdatePostDate: changed
LOWOct 16, 2026NCT07159841lastUpdatePostDate: changed
HIGHOct 14, 2026NCT05804669Status: ACTIVE_NOT_RECRUITING → COMPLETED
HIGHOct 14, 2026NCT05804669Status: ACTIVE_NOT_RECRUITING → COMPLETED
MEDIUMOct 11, 2026NCT05907291TRIAL_REMOVED: changed
MEDIUMOct 11, 2026NCT05907291TRIAL_REMOVED: changed
MEDIUMOct 11, 2026NCT05907291TRIAL_REMOVED: changed
MEDIUMOct 11, 2026NCT05907291TRIAL_REMOVED: changed
LOWSep 30, 2026NCT07144163lastUpdatePostDate: changed
LOWSep 30, 2026NCT07159841lastUpdatePostDate: changed
LOWSep 30, 2026NCT07144163lastUpdatePostDate: changed
LOWSep 30, 2026NCT07159841lastUpdatePostDate: changed
LOWSep 2, 2026NCT07144163lastUpdatePostDate: changed
LOWSep 2, 2026NCT07159841lastUpdatePostDate: changed
LOWSep 2, 2026NCT07144163lastUpdatePostDate: changed
LOWSep 2, 2026NCT07159841lastUpdatePostDate: changed

Frequently asked questions about CRN04894

What is CRN04894?

CRN04894 is an oral small molecule drug developed by Crinetics Pharmaceuticals, Inc. (ticker CRNX). It is an investigational compound that has completed a Phase 1 clinical trial in healthy volunteers. The specific medical conditions it may treat have not been publicly disclosed.

What does CRN04894 target?

CRN04894 targets adrenocorticotropic hormone (ACTH), a hormone involved in regulating cortisol production. By targeting ACTH, the drug is designed to modulate hormonal signaling. This mechanism is being explored in early-stage clinical development.

Who makes CRN04894?

CRN04894 is being developed by Crinetics Pharmaceuticals, Inc., a biopharmaceutical company that trades on the Nasdaq under the ticker symbol CRNX. Crinetics is focused on discovering and developing therapeutics for endocrine-related conditions.

What phase is CRN04894 in?

CRN04894 is in Phase 1 clinical development. It has completed one Phase 1 trial and is not yet approved by the FDA or any regulatory agency. The drug remains investigational and further studies are needed to evaluate its safety and efficacy.

What clinical trials is CRN04894 in?

CRN04894 has been studied in a single Phase 1 clinical trial, NCT06048887, titled "Single and Multiple-Ascending Dose Study of CRN04894 in Healthy Volunteers." This completed trial enrolled 88 healthy adult participants in the United States and used a randomized, double-blind, controlled design.

Is CRN04894 the same as CRN04894 Oral Solution?

Yes, CRN04894 Oral Solution is an alternative name for CRN04894. Both refer to the same investigational small molecule developed by Crinetics Pharmaceuticals. The oral solution formulation was used in the Phase 1 trial NCT06048887.