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New pill could tame hormone disorder Cushing's syndrome

NCT ID NCT05804669

Disease control Sponsor: Crinetics Pharmaceuticals Inc. Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Aug 20, 2026 · Updated 2 times

Summary

This early-stage study tests an experimental pill called CRN04894 in 18 adults with Cushing's syndrome caused by too much ACTH hormone. The drug works by blocking the receptor that ACTH acts on, aiming to lower cortisol levels and control the disease. The main goals are to check safety and how the body processes the drug, with a secondary look at cortisol changes. Participants must have active Cushing's and may need to stop other treatments briefly before joining.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 1/2

Runs two stages together: safety and dose first, then whether the treatment works.

Participants

19 people

The number who actually took part.

Started

Oct 2023

Expected to finish

Oct 2026

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Adult male or female, aged 18 years or more 2. Evidence of chronic 'active' ACTH-dependent Cushing's syndrome 3. Evidence of acutely 'active' ACTH-dependent Cushing's syndrome within 10 days of Day 1 4. Participants with documented ACTH-dependent Cushing's syndrome taking short-acting steroidogenesis inhibitors (ketoconazole, levoketoconazole, osilodrostat, or metyrapone) may participate after a washout period of at least 5 days, if they meet other study inclusion criteria, relative to Investigator's judgment. Participants with documented ACTH-dependent Cushing's syndrome taking cabergoline may participate after a washout period of at least 14 days, if they meet other study inclusion criteria Exclusion Criteria: 1. Women who are pregnant or lactating 2. History of bilateral adrenalectomy 3. Previous pituitary MRI findings of a putative ACTH-secreting lesion within 3 mm of the optic chiasm 4. Presence of any known malignancy 5. Use of mitotane 6. Previous unsuccessful surgery for Cushing's syndrome within 6 weeks

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Conditions

The condition(s) this trial relates to.

ACTH-dependent Cushing syndrome Cushing disease due to pituitary adenoma Cushing syndrome ectopic ACTH secretion syndrome

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Cushing disease Cushing syndrome Ectopic ACTH syndrome

Contacts and locations

Locations

  • National Institutes of Health (NIH) - National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

    Bethesda, Maryland, 20892, United States

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