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atumelnant

Phase 3

Congenital Adrenal Hyperplasia | Small molecule | Endocrine |Crinetics Pharmaceuticals, Inc.|Last Updated: Sep 2, 2026

Target and mechanism

ModalitySmall molecule

Also known as atumelnant (CRN04894)

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials4
Total Enrollment541

FDA Designations

ORPHAN_DRUGRARE_PEDIATRIC_DISEASE

Clinical trial landscape

atumelnant · 7 trials · 6 indications

Phase 3 1Phase 2 3Phase 1 3
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)
Week 12
Incidence of treatment-emergent adverse events (TEAEs) throughout the study
Week 12
Cohort 1: Pharmacokinetics (AUC 0-last)
Up to Day 34
Cohort 1: Pharmacokinetics (AUC 0-inf)
Up to Day 34
Cohort 1: Pharmacokinetics (Cmax)
Up to Day 34
Cohort 2: Pharmacokinetics (AUC 0-last)
Up to Day 21
Cohort 2: Pharmacokinetics (AUC 0-inf)
Up to Day 21
Cohort 2: Pharmacokinetics (Cmax)
Up to Day 21
Pharmacokinetics (Cmax)
[Time Frame: Up to Day 30]

Assessment of the maximum observed plasma concentration of atumelnant

Pharmacokinetics (Tmax)
[Time Frame: Up to Day 30]

Assessment of time to maximal atumelnant concentration (Tmax)

Pharmacokinetics (AUC)
[Time Frame: Up to Day 30]

Assessment of the plasma area under the curve of Atumelnant

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

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.
Cohort 1EXPERIMENTALatumelnant, carbamazepine (CYP3A4 Inducer)
Cohort 2EXPERIMENTALatumelnant, midazolam (CYP3A4 substrate), digoxin (P-gp substrate), metformin (MATE1/2-K substrate)
Treatment (Cohort 1)EXPERIMENTALFixed-sequence cohort for Japanese participants.
Placebo (Cohort 1)ACTIVE_COMPARATORFixed-sequence cohort for Japanese participants.
Treatment (Cohort 2)EXPERIMENTALFixed-sequence cohort for Caucasian participants.
Placebo (Cohort 2)ACTIVE_COMPARATORFixed-sequence cohort for Caucasian participants.
Multiple Ascending DosesEXPERIMENTALSequential, open-label, 10-day or 14-day fixed-dose cohorts.

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.
CarbamazepineDRUGCYP3A4 inducer
MidazolamDRUGCYP3A4 substrate
DigoxinDRUGP-gp substrate
MetforminDRUGMATE1/2-K substrate
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Eligibility Criteria

Age Range18 Years to 74 Years
SexALL
Healthy VolunteersNo
Study Sites68

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 StatesArgentinaAustraliaAustriaBrazilFranceGermanyItalyJapanNetherlandsPolandSaudi ArabiaSwedenUnited KingdomBelgiumChileIndia
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Recent Changes (Last 90 Days)

LOWSep 2, 2026NCT07144163lastUpdatePostDate: changed
LOWSep 2, 2026NCT07159841lastUpdatePostDate: changed
LOWSep 2, 2026NCT07144163lastUpdatePostDate: changed
LOWSep 2, 2026NCT07159841lastUpdatePostDate: changed
LOWSep 2, 2026NCT07144163lastUpdatePostDate: changed
LOWSep 2, 2026NCT07159841lastUpdatePostDate: changed
MEDIUMAug 20, 2026NCT05804669Status: RECRUITING → ACTIVE_NOT_RECRUITING
HIGHAug 20, 2026NCT07570082Status: ACTIVE_NOT_RECRUITING → COMPLETED
MEDIUMAug 20, 2026NCT05804669Status: RECRUITING → ACTIVE_NOT_RECRUITING
HIGHAug 20, 2026NCT07570082Status: ACTIVE_NOT_RECRUITING → COMPLETED
MEDIUMAug 20, 2026NCT05804669Status: RECRUITING → ACTIVE_NOT_RECRUITING
HIGHAug 20, 2026NCT07570082Status: ACTIVE_NOT_RECRUITING → COMPLETED
MEDIUMAug 20, 2026NCT05804669Status: RECRUITING → ACTIVE_NOT_RECRUITING
HIGHAug 20, 2026NCT07570082Status: ACTIVE_NOT_RECRUITING → COMPLETED
LOWAug 12, 2026NCT07144163lastUpdatePostDate: changed
LOWAug 12, 2026NCT07159841lastUpdatePostDate: changed
LOWAug 12, 2026NCT07144163lastUpdatePostDate: changed
LOWAug 12, 2026NCT07159841lastUpdatePostDate: changed
LOWJul 24, 2026NCT07144163lastUpdatePostDate: changed
LOWJul 24, 2026NCT07159841lastUpdatePostDate: changed

Frequently asked questions about atumelnant

What is Atumelnant used for?

Atumelnant is an investigational small molecule being developed for the treatment of congenital adrenal hyperplasia (CAH), including classic congenital adrenal hyperplasia. It is also being studied in healthy volunteers and for Cushing syndrome. The drug is currently in Phase 1 clinical development.

Who makes Atumelnant?

Atumelnant is being developed by Crinetics Pharmaceuticals, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol CRNX. The company is conducting clinical trials to evaluate the safety and efficacy of Atumelnant in patients with congenital adrenal hyperplasia.

What phase is Atumelnant in?

Atumelnant is in Phase 1 clinical development. It has received orphan drug designation and rare pediatric disease designation from the FDA. The drug is investigational and has not been approved by regulatory authorities for any indication.

What clinical trials is Atumelnant in?

Atumelnant is being studied in four clinical trials, including NCT05907291 (completed Phase 2 in congenital adrenal hyperplasia), NCT06712823 (recruiting Phase 2 extension study), NCT07144163 (recruiting Phase 3 in adults with CAH), and NCT07159841 (recruiting Phase 2 pediatric study).

Is Atumelnant the same as CRN04894?

Yes, Atumelnant is also known as CRN04894. The drug is referred to by both names in clinical research and development documentation. Crinetics Pharmaceuticals is developing this compound under the brand name Atumelnant.