Crinecerfont safety testing in babies with classic CAH under 4 years old
Official title: A Phase 2, Open-Label Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Crinecerfont in Pediatric Participants 3 Months to <4 Years of Age With Classic Congenital Adrenal Hyperplasia
Run by Neurocrine Biosciences · NCT07536269 · Data updated 2026-11-12
This study tests whether crinecerfont is safe and tolerable in children under 4 years with classic CAH who have been on hydrocortisone.
Quick facts
| Phase | Phase 2 |
|---|---|
| Study type | Interventional |
| Ages | 3 Months to 47 Months |
| Sex | All |
| Enrollment | 20 (estimated) |
| Sponsor | Neurocrine Biosciences Industry-sponsored |
| Locations | 11 sites (San Francisco, California and 10 other locations) |
| Status | Recruiting |
| Started | July 1, 2026 |
| Main results expected | March 2028 |
| Study ends | March 2028 |
| Registry record updated | September 16, 2026 |
| Trial ID | NCT07536269 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are infants or toddlers under 4 years with confirmed classic CAH (salt-wasting or simple virilizing) who have been on a stable hydrocortisone dose and meet weight and newborn screening criteria.
✕Probably not a fit
Children with other forms of CAH, those needing daily steroids for conditions other than CAH, or with significant other medical conditions may not benefit from this trial.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This Phase 2 interventional trial evaluates safety, tolerability, and how the drug behaves in the body and its effects on the body’s response in pediatric participants aged 3 months to under 4 years with classic CAH due to 21-hydroxylase deficiency. Participants receive crinecerfont, with eligibility requiring a stable hydrocortisone dose for at least 4 weeks before screening. The study is conducted at Neurocrine Clinical Sites in San Francisco, Aurora, and Hartford to monitor safety and pharmacokinetics/pharmacodynamics in a young population.
Why it matters
Potential benefit: If successful, the study could support safer treatment options for very young children with CAH.
How similar studies have gone: Previous studies in different age groups have explored crinecerfont safety, with limited data in this very young population; results in older participants have informed safety expectations for pediatrics.
Who can join: the full rules
Show full inclusion / exclusion criteria
Key Inclusion Criteria: * Have a medically confirmed diagnosis of classic CAH (salt wasting or simple virilizing) due to 21-hydroxylase deficiency (21-OHD) * Have received at least 3 months of hydrocortisone treatment before Day 1, with a stable dose for at least 4 weeks before screening. * Have a body weight of at least 4.5 kilograms (kg) at screening. * Have a newborn screen that is otherwise normal except for elevated 17-OHP or any other abnormality on newborn screen that was cleared upon evaluation by a pediatric specialist. Key Exclusion Criteria: * Have a known or suspected diagnosis of any of the other forms of classic CAH. * Have any condition besides CAH that requires chronic daily therapy with orally administered steroids. * Have any other clinically significant medical condition or chronic disease. Note: Other protocol-defined inclusion and exclusion criteria may apply.
Where it's running
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Neurocrine Clinical Site
San Francisco, California, United States Recruiting -
Neurocrine Clinical Site
Aurora, Colorado, United States Recruiting -
Neurocrine Clinical Site
Hartford, Connecticut, United States Recruiting -
Neurocrine Clinical Site
Atlanta, Georgia, United States Recruiting -
Neurocrine Clinical Site
Chicago, Illinois, United States Recruiting -
Neurocrine Clinical Site
Indianapolis, Indiana, United States Recruiting
Show 5 more locations
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Neurocrine Clinical Site
Ann Arbor, Michigan, United States Recruiting -
Neurocrine Clinical Site
Minneapolis, Minnesota, United States Recruiting -
Neurocrine Clinical Site
Philadelphia, Pennsylvania, United States Recruiting -
Neurocrine Clinical Site
Dallas, Texas, United States Recruiting -
Neurocrine Clinical Site
Seattle, Washington, United States Recruiting
Study contacts
- Study coordinator: Neurocrine Medical Information Call Center
- Email: medinfo@neurocrine.com
- Phone: 1-877-641-3461
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.