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Updated May 2026 · ClinicalTrials.gov

RECRUITINGPhase 2 / Phase 3INTERVENTIONAL

A Study in Pediatric Participants With Congenital Adrenal Hyperplasia (Balance-CAH)

A Phase 2/3 Study to Evaluate the Safety, Efficacy, and Pharmacokinetics of Atumelnant Treatment in Pediatric Participants With Congenital Adrenal Hyperplasia Including a Long-Term Extension

A Study in Pediatric Participants With Congenital Adrenal Hyperplasia (Balance-CAH) (NCT07159841) is a Phase 2 / Phase 3 interventional studying Congenital Adrenal Hyperplasia and Classic Congenital Adrenal Hyperplasia, sponsored by Crinetics Pharmaceuticals Inc.. RECRUITING as of the most recent ClinicalTrials.gov update. Talk to your doctor before contacting the trial site.

Important: This information is not medical advice. Talk to your doctor about whether a clinical trial is right for you.

About This Trial

The purpose of this study is to evaluate the safety, efficacy, pharmacokinetics (PK), and pharmacodynamics (PD) of atumelnant treatment in pediatric participants with classic congenital adrenal hyperplasia (CAH).

What Stage of Research Is This?

Phase 2 trials evaluate whether a treatment actually works against Congenital Adrenal Hyperplasia and continue monitoring side effects. Phase 2 enrolls larger groups (typically 100–300 patients) and produces the first real efficacy signal. A successful Phase 2 readout is what unlocks the much larger Phase 3 confirmatory trials needed for FDA approval.

This trial is currently recruiting participants. The sponsor has registered the study with ClinicalTrials.gov as actively enrolling, which means new applicants who meet the eligibility criteria can be considered for screening. Trial status can change between updates — confirm current recruiting status with the study contact before traveling for a screening visit.

Target enrollment of 153 participants puts this in the typical range for a Phase 2-style efficacy study or a moderate Phase 3 trial in a focused Congenital Adrenal Hyperplasia subpopulation. At this scale, the study has enough statistical power to detect a clear treatment effect but is not the largest cohort in the field.

Who May Be Eligible (Plain English)

Who May Qualify: Part A and B participants are eligible to be included in the study only if all of the following criteria apply: 1. Male or female at birth, between 1 to \<18 years of chronological age at the time of signing the willing to sign a consent form Form (ICF). 2. Have a medically confirmed diagnosis of classic CAH due to 21-hydroxylase deficiency (21-OHD) based on standard medically accepted criteria such as elevated 17-OHP level, confirmed CYP21A2 genetic testing, positive newborn screening with confirmatory second tier testing, or cosyntropin stimulation. 3. Participants must have an elevated morning serum A4 level \>ULN during Screening obtained prior to morning glucocorticoid (GC) administration. 4. Participants must be on a stable supraphysiologic GC replacement therapy for at least one month prior to Screening. 5. Compliance, as judged per Investigator discretion, with GC replacement and mineralocorticoid replacement (if applicable) regimen documented during the Screening Period. 6. Normal thyroid stimulating hormone (TSH) and thyroxine (T4) within 3 months of Screening per age-appropriate range. Part C inclusion criteria require participants to complete treatment in either Part A or Part B and in the Investigator's opinion it would benefit the participant to continue in Part C, regardless of age. Who Should NOT Join This Trial: Part A and Part B: Individuals in Part A and Part B who meet any of the following criteria will be excluded from participation in this study: 1. Diagnosis of any form of CAH other than classic 21-OHD. 2. Participants treated with other GCs within 30 days of Screening. 3. Stress dose of GC therapy within 2 weeks of start of Screening, defined as any dose above the normal maintenance dose, including but not limited to intravenous (IV) or intramuscular (IM) hydrocortisone. 4. Use of growth hormones within 1 week of start of Screening for short acting, or within 6 weeks of start of Screening for long acting. ...See full criteria on ClinicalTrials.gov Always talk to your doctor about whether this trial is right for you.

These are translations of the protocol\'s inclusion and exclusion criteria, simplified for patients and caregivers. The original clinical text appears below. Eligibility is ultimately confirmed by the trial site\'s screening process — this summary is a starting point for a conversation with your doctor, not a final determination.

Original Eligibility Criteria

View original clinical language
Inclusion Criteria: Part A and B participants are eligible to be included in the study only if all of the following criteria apply: 1. Male or female at birth, between 1 to \<18 years of chronological age at the time of signing the Informed Consent Form (ICF). 2. Have a medically confirmed diagnosis of classic CAH due to 21-hydroxylase deficiency (21-OHD) based on standard medically accepted criteria such as elevated 17-OHP level, confirmed CYP21A2 genetic testing, positive newborn screening with confirmatory second tier testing, or cosyntropin stimulation. 3. Participants must have an elevated morning serum A4 level \>ULN during Screening obtained prior to morning glucocorticoid (GC) administration. 4. Participants must be on a stable supraphysiologic GC replacement therapy for at least one month prior to Screening. 5. Compliance, as judged per Investigator discretion, with GC replacement and mineralocorticoid replacement (if applicable) regimen documented during the Screening Period. 6. Normal thyroid stimulating hormone (TSH) and thyroxine (T4) within 3 months of Screening per age-appropriate range. Part C inclusion criteria require participants to complete treatment in either Part A or Part B and in the Investigator's opinion it would benefit the participant to continue in Part C, regardless of age. Exclusion Criteria: Part A and Part B: Individuals in Part A and Part B who meet any of the following criteria will be excluded from participation in this study: 1. Diagnosis of any form of CAH other than classic 21-OHD. 2. Participants treated with other GCs within 30 days of Screening. 3. Stress dose of GC therapy within 2 weeks of start of Screening, defined as any dose above the normal maintenance dose, including but not limited to intravenous (IV) or intramuscular (IM) hydrocortisone. 4. Use of growth hormones within 1 week of start of Screening for short acting, or within 6 weeks of start of Screening for long acting. 5. Use of a corticotropin-releasing factor receptor antagonist within 14 days of Screening. 6. History of cancer excluding cured/treated dermal squamous or basal cell carcinoma or cervical carcinoma in situ. 7. Abnormal sleep/wake cycles (as determined by the Investigator). 8. Female participants who are pregnant or lactating. 9. Participants who have been dosed with an investigational drug (other than atumelnant) in any prior clinical study within 60 days or 5 half-lives (whichever is longer) prior to the first dose. Part C: 10. Individuals in Part C who do not meet the Part C Inclusion Criteria.

Treatments Being Tested

DRUG

Atumelnant

Atumelnant, tablets, once daily by mouth, weight-based dosing

DRUG

Placebo

Placebo, tablets, once daily by mouth, weight-based dosing

Locations (20)

Trial sites listed on ClinicalTrials.gov for this study. Site activation status can vary — confirm with the specific site before traveling for a screening visit.

University of Michigan
Ann Arbor, Michigan, United States
University of Minnesota
Minneapolis, Minnesota, United States
Rutgers Robert Wood Johnson Medical School
New Brunswick, New Jersey, United States
Children's Hospital of Philadelphia
Philadelphia, Pennsylvania, United States
Cook Children's Health Care System
Fort Worth, Texas, United States
University of Virginia Health System
Charlottesville, Virginia, United States
Instituto de Investigaciones Metabólicas
Buenos Aires, Buenos Aires, Argentina
Hospital de Niños de la Santísima Trinidad
Córdoba, Córdoba Province, Argentina
Hospital Italiano de Buenos Aires
Buenos Aires, Argentina
Instituto Médico Especializado (IME)
Buenos Aires, Argentina
CEDIE "Centro de Investigaciones Endocrinológicas", CONICET-FEI División de Endocrinología, Hosp de Niños Ricardo Gutiérrez
Buenos Aires, Argentina
Institute of Endocrinology of Diabetes, The Children's Hospital at Westmead
Westmead, New South Wales, Australia
Queensland Children's Hospital
South Brisbane, Queensland, Australia
Monash Children's Hospital, Monash Health
Clayton, Victoria, Australia
UZA (Antwerp University Hospital)
Edegem, Antwerp, Belgium
UZ Gent (University Hospital Ghent)
Ghent, East Flanders, Belgium
UZ Leuven (Universitair Ziekenhuis Leuven)
Leuven, Flemish Brabant, Belgium
Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo (HCFMUSP)
São Paulo, São Paulo, Brazil
Centre Hospitalier Universitaire (CHU) d'Angers
Angers, France
Hopital Kremlin-Bicétre - APHP Paris Saclay
Le Kremlin-Bicêtre, France

How to Talk to Your Doctor About This Trial

Bring the printable summary of this trial — including the NCT ID (NCT07159841), the sponsor (Crinetics Pharmaceuticals Inc.), and the key eligibility criteria — to your next appointment. Your doctor can review the inclusion and exclusion criteria against your medical history, lab values, and current treatments to assess whether you are likely to qualify. They can also help you weigh whether trial participation makes sense alongside your existing care plan.

Useful questions to walk through together: What does the trial protocol require beyond standard care? How long is the active treatment phase, and how long is follow-up? Are there study visits at sites I can reach? Who pays for the trial-specific procedures, and who pays for standard-of-care portions? See our 25 questions to ask about clinical trials guide for a more complete checklist.

Authoritative Sources

The official record for this trial lives on ClinicalTrials.gov — the federal registry maintained by the National Library of Medicine at NIH. For background on how this trial fits into the FDA approval pathway, see the FDA drug approval process. For oncology-specific guidance for patients considering trials, the National Cancer Institute publishes patient-oriented overviews. International trial registries are aggregated by the WHO ICTRP.

Frequently Asked Questions

What is the NCT07159841 clinical trial studying?

The purpose of this study is to evaluate the safety, efficacy, pharmacokinetics (PK), and pharmacodynamics (PD) of atumelnant treatment in pediatric participants with classic congenital adrenal hyperplasia (CAH). The full protocol is registered on ClinicalTrials.gov and includes the primary outcome measures, eligibility criteria, and study endpoints.

Who can participate in NCT07159841?

Eligibility for this trial depends on the specific inclusion and exclusion criteria set by the sponsor. The plain-English summary above translates the most important criteria into accessible language; the official clinical text is preserved in the collapsible section underneath. Whether you fit any specific trial is a medical decision your doctor needs to confirm — bring the trial information to your treating physician for a full review against your medical history.

How do I contact the trial site for NCT07159841?

Contact information registered with ClinicalTrials.gov is shown in the sidebar of this page. Before reaching out, confirm with your treating physician that this trial is appropriate for your situation. The trial site will then walk you through the screening process to determine final eligibility.

Is participating in a clinical trial safe?

Clinical trials in the United States are regulated by the FDA and overseen by Institutional Review Boards (IRBs) that review the protocol for safety. Risk varies by trial — Phase 1 studies test new treatments in humans for the first time, while Phase 3 trials use treatments that have already passed earlier safety screening. The informed consent document for any specific trial details the known risks and what to expect. Discuss those risks with your physician before deciding whether to participate.

Where can I verify the data on this page?

Every detail on this page comes directly from the ClinicalTrials.gov API. Click "View on ClinicalTrials.gov" in the sidebar to see the official, unmodified record. The federal record is always authoritative; this page is a structured presentation with a plain-English eligibility translation. For background on how clinical trials are regulated, see the FDA drug approval process documentation.

How This Page Is Built

Every field on this page is pulled directly from the ClinicalTrials.gov API v2 — no estimates, no proxies. The plain-English eligibility translation is generated from the original protocol text and reviewed for fidelity to the underlying clinical criteria. The original clinical text remains visible in the collapsible section above so users and clinicians can verify the translation. Read the full methodology for the data pipeline and known limitations.

Source: ClinicalTrials.gov API v2 record for NCT07159841. Maintained by the National Library of Medicine at NIH. Public domain. Cite as: "TrialFinderData. NCT07159841. Data: ClinicalTrials.gov."

Medical disclaimer: This page is informational, not medical advice. Talk to your doctor about whether a clinical trial is right for you.

Last updated 2026-05-08 · Data from ClinicalTrials.gov.