Clinical trial Recruiting at 11 sites Phase 2 Interventional Ages 3 Months to 47 Months

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.

More Congenital Adrenal Hyperplasia trials

Quick facts

PhasePhase 2
Study typeInterventional
Ages3 Months to 47 Months
SexAll
Enrollment20 (estimated)
SponsorNeurocrine Biosciences
Industry-sponsored
Locations11 sites (San Francisco, California and 10 other locations)
StatusRecruiting
StartedJuly 1, 2026
Main results expectedMarch 2028
Study endsMarch 2028
Registry record updatedSeptember 16, 2026
Trial IDNCT07536269 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

  • 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
  • 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

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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    This study will test whether atumelnant is safe and helps control hormone levels in children aged 1 to under 18 with classic congenital adrenal hyperplasia.

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  • Atumelnant for adults with classic congenital adrenal hyperplasia

    This will test whether taking once-daily atumelnant helps adults with classic 21‑hydroxylase deficiency CAH who are already on stable glucocorticoid therapy.

    Recruiting at 82 sites Phase 3 Crinetics Pharmaceuticals Inc. · Los Angeles, California and 81 other locations · NCT07144163

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    Recruiting IRCCS Azienda Ospedaliero-Universitaria di Bologna · Bologna · NCT06754423

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.