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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

Full criteria on ClinicalTrials.gov

Sites (56)

Sites in registry order. Pick your city on the disease page to sort them by distance.

SiteCityCountrySite status
Queensland Children's Hospital
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BrisbaneAustraliaRecruiting
Royal Prince Alfred Hospital
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CamperdownAustraliaRecruiting
Sydney Children's Hospital
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RandwickAustraliaRecruiting
Children's Hospital at Westmead
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WestmeadAustraliaRecruiting
UZ Brussels
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JetteBelgiumRecruiting
AMNDX Inc.
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ThornhillCanadaRecruiting
Jodha Tishon Inc.
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TorontoCanadaWithdrawn
University Hospital Essen
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EssenGermanyRecruiting
Aarhus University Hospital
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AarhusDenmarkRecruiting
Rigshospitalet
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CopenhagenDenmarkRecruiting
Hospital Sant Joan de Déu
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BarcelonaSpainRecruiting
Corporacio Sanitaria Parc Tauli, Sabadell
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BarcelonaSpainRecruiting
Hospital Universitario 12 de Octubre
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MadridSpainRecruiting
Universitario Virgen de la Victoria
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MálagaSpainRecruiting
CHU d Angers
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AngersFranceRecruiting
CHU de Toulouse - Hôpital des Enfants
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ToulouseFranceRecruiting
Fulbourn Hospital
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CambridgeUnited KingdomRecruiting
Ninewells Hospital - PPDS
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DundeeUnited KingdomRecruiting
Royal Hospital for Children and Young People
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EdinburghUnited KingdomRecruiting
Hull Royal Infirmary
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HullUnited KingdomRecruiting
Azienda Ospedaliero Universitaria A. Meyer
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FlorenceItalyRecruiting
University of Florence
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FlorenceItalyRecruiting
Istituto G Gaslini Ospedale Pediatrico IRCCS - INCIPIT - PIN
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GenovaItalyRecruiting
Ospedale San Raffaele S.r.l. - PPDS
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MilanItalyRecruiting
Azienda Ospedale Università Padova - Dipartimento Salute della Donna e del Bambino - INCIPIT - PIN
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PadovaItalyRecruiting
Ospedale Pediatrico Bambino Gesù, IRCCS
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RomaItalyRecruiting
IRCCS Materno Infantile Burlo Garofolo - INCIPIT - PIN
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TriesteItalyRecruiting
Samodzielny Publiczny Szpital Kliniczny
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SzczecinPolandRecruiting
Uniwersytecki Szpital Kliniczny im. Jana Mikulicza-Radeckiego we Wroclawiu-Chalubinskiego 2-2a
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WroclawPolandRecruiting
National Clinical Center for Children Neurorehabilitation "Dr. Nicolae Robanescu"
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BucharestRomaniaRecruiting
Institutul National de Endocrinologie "C.I. Parhon"
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BucharestRomaniaRecruiting
Louis Turcanu Emergency Clinical Hospital for Children
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TimișoaraRomaniaRecruiting
Karolinska Universitetssjukhuset Solna
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SolnaSwedenRecruiting
Emory University School of Medicine
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AtlantaUnited StatesRecruiting
Rare Disease Research
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AtlantaUnited StatesWithdrawn
Atlanta Diabetes Associates
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AtlantaUnited StatesWithdrawn
Colorado Children's Hospital
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AuroraUnited StatesRecruiting
Johns Hopkins Hospital
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BaltimoreUnited StatesRecruiting
Johns Hopkins University Hospital
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BaltimoreUnited StatesRecruiting
Maimonides Medical Center
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BrooklynUnited StatesRecruiting
Ann and Robert H. Lurie Children's Hospital of Chicago
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ChicagoUnited StatesRecruiting
CTI Clinical Research Center
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CincinnatiUnited StatesWithdrawn
Center for Human Genetics
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ClevelandUnited StatesRecruiting
Texas Children's Hospital
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HoustonUnited StatesRecruiting
Riley Children's Hospital
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IndianapolisUnited StatesRecruiting
Santa Monica Clinical Trials
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Los AngelesUnited StatesRecruiting
Childrens Hospital of Wisconsin
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MilwaukeeUnited StatesRecruiting
Science 37 (at-home option)
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MorrisvilleUnited StatesRecruiting
Science 37
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MorrisvilleUnited StatesRecruiting
Mayo Clinic - PPDS
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RochesterUnited StatesRecruiting
Center Of Excellence in Diabetes and Endocrinology
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SacramentoUnited StatesRecruiting
Road Runner Research
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San AntonioUnited StatesRecruiting
Rady Children's Hospital - Scan Diego
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San DiegoUnited StatesRecruiting
Montefiore Medical Center
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The BronxUnited StatesRecruiting
Texas Valley Clinical Research
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WeslacoUnited StatesTerminated
Nemours Children's Hospital
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WilmingtonUnited StatesRecruiting

This page is information, not medical advice. Discuss any trial with your doctor.