NCT06366464RecruitingPhase 3
A Study of Pitolisant in Patients With Prader-Willi Syndrome
A Phase 3, Randomized, Double-Blind, Placebo-controlled, Efficacy and Safety Study of Pitolisant Followed by an Open-Label Extension in Patients With Prader-Willi Syndrome
Source: ClinicalTrials.gov · Last updated 25 Aug 2026
Brief summary (registry, in English)
This is a Phase 3, randomized, double-blind, placebo-controlled, multicenter, global clinical study to assess the efficacy and safety of pitolisant in patients living with Prader-Willi syndrome. The primary objective of this study is to evaluate the efficacy of pitolisant in treating excessive daytime sleepiness (EDS) in patients ≥6 years of age with Prader-Willi syndrome. Secondary objectives include assessing the impact of pitolisant on: Irritable and disruptive behaviors Hyperphagia Other behavioral problems including social withdrawal, stereotypic behavior, hyperactivity/noncompliance, and inappropriate speech
- Status (registry)
- Recruiting
- Phase (registry)
- Phase 3
- Study type
- Interventional
- Enrollment
- 134 (estimated)
- First submitted
- 9 Oct 2023
- Start date
- 28 May 2024
- Primary completion date
- Apr 2027
- Lead sponsor
- Harmony Biosciences Management, Inc.
- NCT number
- NCT06366464
What you commit to
- Study type: Interventional · Phase 3
- Planned participants: 134
- From 28 May 2024 to the primary completion date, Apr 2027
- 56 sites in 13 countries
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Prior treatment
- Participation in an interventional research study involving another investigational medication, device, or behavioral treatment within 30 days or 5 half-lives (whichever is longer) of the investigational medication prior to Screening
Other illness
- Has a diagnosis of hypersomnia due to another sleep/medical disorder
Other
- Has a diagnosis of sleep apnea (OSA, CSA) that is not adequately controlled
Who the study is looking for
- Genetically confirmed diagnosis of PWS
- Excessive daytime sleepiness
- Has a consistent parent/caregiver (preferably the same person throughout the study) who is willing and able to complete the required study assessments.
- In the opinion of the Investigator, the patient/parent(s)/caregiver(s)/legal guardian(s) are capable of understanding and complying with the requirements of the protocol and administration of oral study drug.
Age in the registry: 6 years to - · Sex: All · Does not accept healthy volunteers
Sites (56)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Queensland Children's Hospital Coordinator of this site? Confirm its status | Brisbane | Australia | Recruiting |
| Royal Prince Alfred Hospital Coordinator of this site? Confirm its status | Camperdown | Australia | Recruiting |
| Sydney Children's Hospital Coordinator of this site? Confirm its status | Randwick | Australia | Recruiting |
| Children's Hospital at Westmead Coordinator of this site? Confirm its status | Westmead | Australia | Recruiting |
| UZ Brussels Coordinator of this site? Confirm its status | Jette | Belgium | Recruiting |
| AMNDX Inc. Coordinator of this site? Confirm its status | Thornhill | Canada | Recruiting |
| Jodha Tishon Inc. Coordinator of this site? Confirm its status | Toronto | Canada | Withdrawn |
| University Hospital Essen Coordinator of this site? Confirm its status | Essen | Germany | Recruiting |
| Aarhus University Hospital Coordinator of this site? Confirm its status | Aarhus | Denmark | Recruiting |
| Rigshospitalet Coordinator of this site? Confirm its status | Copenhagen | Denmark | Recruiting |
| Hospital Sant Joan de Déu Coordinator of this site? Confirm its status | Barcelona | Spain | Recruiting |
| Corporacio Sanitaria Parc Tauli, Sabadell Coordinator of this site? Confirm its status | Barcelona | Spain | Recruiting |
| Hospital Universitario 12 de Octubre Coordinator of this site? Confirm its status | Madrid | Spain | Recruiting |
| Universitario Virgen de la Victoria Coordinator of this site? Confirm its status | Málaga | Spain | Recruiting |
| CHU d Angers Coordinator of this site? Confirm its status | Angers | France | Recruiting |
| CHU de Toulouse - Hôpital des Enfants Coordinator of this site? Confirm its status | Toulouse | France | Recruiting |
| Fulbourn Hospital Coordinator of this site? Confirm its status | Cambridge | United Kingdom | Recruiting |
| Ninewells Hospital - PPDS Coordinator of this site? Confirm its status | Dundee | United Kingdom | Recruiting |
| Royal Hospital for Children and Young People Coordinator of this site? Confirm its status | Edinburgh | United Kingdom | Recruiting |
| Hull Royal Infirmary Coordinator of this site? Confirm its status | Hull | United Kingdom | Recruiting |
| Azienda Ospedaliero Universitaria A. Meyer Coordinator of this site? Confirm its status | Florence | Italy | Recruiting |
| University of Florence Coordinator of this site? Confirm its status | Florence | Italy | Recruiting |
| Istituto G Gaslini Ospedale Pediatrico IRCCS - INCIPIT - PIN Coordinator of this site? Confirm its status | Genova | Italy | Recruiting |
| Ospedale San Raffaele S.r.l. - PPDS Coordinator of this site? Confirm its status | Milan | Italy | Recruiting |
| Azienda Ospedale Università Padova - Dipartimento Salute della Donna e del Bambino - INCIPIT - PIN Coordinator of this site? Confirm its status | Padova | Italy | Recruiting |
| Ospedale Pediatrico Bambino Gesù, IRCCS Coordinator of this site? Confirm its status | Roma | Italy | Recruiting |
| IRCCS Materno Infantile Burlo Garofolo - INCIPIT - PIN Coordinator of this site? Confirm its status | Trieste | Italy | Recruiting |
| Samodzielny Publiczny Szpital Kliniczny Coordinator of this site? Confirm its status | Szczecin | Poland | Recruiting |
| Uniwersytecki Szpital Kliniczny im. Jana Mikulicza-Radeckiego we Wroclawiu-Chalubinskiego 2-2a Coordinator of this site? Confirm its status | Wroclaw | Poland | Recruiting |
| National Clinical Center for Children Neurorehabilitation "Dr. Nicolae Robanescu" Coordinator of this site? Confirm its status | Bucharest | Romania | Recruiting |
| Institutul National de Endocrinologie "C.I. Parhon" Coordinator of this site? Confirm its status | Bucharest | Romania | Recruiting |
| Louis Turcanu Emergency Clinical Hospital for Children Coordinator of this site? Confirm its status | Timișoara | Romania | Recruiting |
| Karolinska Universitetssjukhuset Solna Coordinator of this site? Confirm its status | Solna | Sweden | Recruiting |
| Emory University School of Medicine Coordinator of this site? Confirm its status | Atlanta | United States | Recruiting |
| Rare Disease Research Coordinator of this site? Confirm its status | Atlanta | United States | Withdrawn |
| Atlanta Diabetes Associates Coordinator of this site? Confirm its status | Atlanta | United States | Withdrawn |
| Colorado Children's Hospital Coordinator of this site? Confirm its status | Aurora | United States | Recruiting |
| Johns Hopkins Hospital Coordinator of this site? Confirm its status | Baltimore | United States | Recruiting |
| Johns Hopkins University Hospital Coordinator of this site? Confirm its status | Baltimore | United States | Recruiting |
| Maimonides Medical Center Coordinator of this site? Confirm its status | Brooklyn | United States | Recruiting |
| Ann and Robert H. Lurie Children's Hospital of Chicago Coordinator of this site? Confirm its status | Chicago | United States | Recruiting |
| CTI Clinical Research Center Coordinator of this site? Confirm its status | Cincinnati | United States | Withdrawn |
| Center for Human Genetics Coordinator of this site? Confirm its status | Cleveland | United States | Recruiting |
| Texas Children's Hospital Coordinator of this site? Confirm its status | Houston | United States | Recruiting |
| Riley Children's Hospital Coordinator of this site? Confirm its status | Indianapolis | United States | Recruiting |
| Santa Monica Clinical Trials Coordinator of this site? Confirm its status | Los Angeles | United States | Recruiting |
| Childrens Hospital of Wisconsin Coordinator of this site? Confirm its status | Milwaukee | United States | Recruiting |
| Science 37 (at-home option) Coordinator of this site? Confirm its status | Morrisville | United States | Recruiting |
| Science 37 Coordinator of this site? Confirm its status | Morrisville | United States | Recruiting |
| Mayo Clinic - PPDS Coordinator of this site? Confirm its status | Rochester | United States | Recruiting |
| Center Of Excellence in Diabetes and Endocrinology Coordinator of this site? Confirm its status | Sacramento | United States | Recruiting |
| Road Runner Research Coordinator of this site? Confirm its status | San Antonio | United States | Recruiting |
| Rady Children's Hospital - Scan Diego Coordinator of this site? Confirm its status | San Diego | United States | Recruiting |
| Montefiore Medical Center Coordinator of this site? Confirm its status | The Bronx | United States | Recruiting |
| Texas Valley Clinical Research Coordinator of this site? Confirm its status | Weslaco | United States | Terminated |
| Nemours Children's Hospital Coordinator of this site? Confirm its status | Wilmington | United States | Recruiting |
This page is information, not medical advice. Discuss any trial with your doctor.