New nasal spray aims to tame relentless hunger in rare genetic disorder
NCT ID NCT06173531
First seen Jun 26, 2026 · Last updated Jun 26, 2026
Summary
This Phase 3 trial tests a nasal spray called carbetocin to reduce the intense, constant hunger (hyperphagia) in people with Prader-Willi syndrome. The study involves 170 participants aged 5 to 30 and lasts 12 weeks. Caregivers will rate changes in hunger-related behaviors using a standard questionnaire.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- carbetocin nasal spray
- What this could lead to
- If it works, this could provide a new treatment to control the constant, severe hunger that is a hallmark of Prader-Willi syndrome.
- What could go wrong
- This is a Phase 3 trial, but it's still experimental. The drug may not work better than placebo, and side effects from the nasal spray are possible.
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
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Phase 3
Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.
- Participants
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About 170 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Nov 2023
- Expected to finish
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Nov 2025
An estimate. End dates often move.
- Lead sponsor
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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
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5 to 30 years
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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 * Male or female and 5 through 30 years of age * Prader-Willi syndrome with a documented disease-causing mutation * Increased appetite with decreased satiety accompanied by food seeking (consistent with PWS Nutritional Phase 3) * HQ-CT total score of ≥13 at Screening and Baseline * CGI-S score for hyperphagia in PWS of ≥4 at Screening and Baseline * Lives with a caregiver who understands and is willing and able to adhere to study-related procedures and is willing to participate in all study visits Exclusion Criteria * Genetically diagnosed with Schaaf-Yang syndrome or another genetic, hormonal, or chromosomal cognitive impairment besides PWS * An active upper respiratory infection at the Screening visit or the Baseline visit * Any clinically significant cardiovascular disorder, renal, hepatic, gastrointestinal, or respiratory disease, including severe asthma * History of, or current, cerebrovascular disease, brain trauma, epilepsy, or frequent migraines. A history of febrile seizures is not exclusionary * Nasal surgery within 1 month of Screening visit or planning to have nasal surgery during the study. * Unwilling to abstain from nasal saline, other nasal irrigation, and other intranasal medications during the Screening period and through the treatment period of the study * Clinically significant irritability or agitation, requiring initiation of or increase in the dose of antipsychotic medication, within the 6 months prior to the Screening visit * Used prostaglandins, prostaglandin analogues, or prostaglandin agonists in the 3 months prior to the Baseline visit. Inhibitors of prostaglandin synthesis, such as nonsteroidal anti-inflammatory drugs, are not exclusionary. * Started a glucagon-like peptide 1 (GLP-1) agonist within the 6 months prior to the Screening visit. Treatment with GLP-1 agonist is allowed if the subject has been taking it for more than 6 months prior to Screening. * Used oxytocin, desmopressin (DDAVP), tesofensine, diazoxide choline, melanocortin-4 receptor (MC4R) agonists (e.g., setmelanotide), or any medication approved to treat hyperphagia within 6 months prior to the Baseline visit * Active psychotic symptoms, a history of psychotic symptoms, or a psychotic disorder * History of suicide attempt or inpatient psychiatric hospitalization * New food-related interventions, including environment or dietary restrictions, within 1 month prior to the Screening visit or during the Screening period (i.e., before the Baseline visit) Additional inclusion/exclusion criteria apply. Subjects will be evaluated at screening to ensure that all criteria for study participation are met.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Alberta Diabetes Institute
Edmonton, Alberta, T6G 2E1, Canada
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Ann & Robert H. Lurie Children's Hospital of Chicago
Chicago, Illinois, 60611, United States
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Barts Health NHS Trust - The Royal London Hospital
London, E1 1BB, United Kingdom
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Boston Children's Hospital
Boston, Massachusetts, 02115, United States
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CHU Sainte Justine
Montreal, Quebec, H3T 1C5, Canada
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Centre Hospitalier Universitaire (CHU) de Toulouse - Hôpital des Enfants
Toulouse, 31059, France
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Children's Hospital Colorado
Aurora, Colorado, 80045, United States
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Children's Mercy Hospital
Kansas City, Missouri, 64108, United States
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Children's of Alabama
Birmingham, Alabama, 35233, United States
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Christus Children's
San Antonio, Texas, 78207, United States
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Cook Children's Health Care System
Fort Worth, Texas, 79104, United States
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Hospital General Universitario Gregorio Marañón
Madrid, 28009, Spain
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Hospital Regional Universitario de Málaga
Málaga, 29010, Spain
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KJF Klinik Josefinum gGmbH
Augsburg, 86154, Germany
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Maimonides Medical Center
Brooklyn, New York, 11219, United States
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Nationwide Children's Hospital
Columbus, Ohio, 43205, United States
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Parc Taulí Hospital Universitari
Barcelona, 08208, Spain
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Phoenix Children's Hospital
Phoenix, Arizona, 85006, United States
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Rady Children's Hospital San Diego
San Diego, California, 92123, United States
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Royal Hospital for Children Glasgow Clinical Research Facility
Glasgow, G51 4TF, United Kingdom
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SSM Health/Saint Louis University
St Louis, Missouri, 63104, United States
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Seattle Children's Hospital
Seattle, Washington, 98105, United States
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Stanford University School of Medicine
Palo Alto, California, 94304, United States
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UPMC-Children's Hospital Pittsburgh
Pittsburgh, Pennsylvania, 15224, United States
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University Hospitals Birmingham NHS Foundation Trust - Heartlands Hospital
Birmingham, B9 5SS, United Kingdom
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University of California Irvine
Orange, California, 92697, United States
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University of Iowa
Iowa City, Iowa, 52242, United States
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University of Utah
Salt Lake City, Utah, 84108, United States
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Universitätsklinikum Essen
Essen, 45147, Germany
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Vanderbilt Clinical Research Center
Nashville, Tennessee, 37232, United States
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