Phase 3 study

Recruiting Phase 3

Sources: ClinicalTrials.gov Checked: 11 October 2026 Not medical advice

This trial at a glance

Status Recruiting
Phase Phase 3
Sponsor Harmony Biosciences Management, Inc.
Registry number NCT06366464
Started 28 May 2024 Today 16 October 2026 Estimated completion 1 April 2027

Where this trial is running

Trial sites and the status recorded for each
SiteCityState or countryStatus at this site
Queensland Children's Hospital Brisbane QLD Recruiting
Royal Prince Alfred Hospital Camperdown Australia Recruiting
Sydney Children's Hospital Randwick Australia Recruiting
Children's Hospital at Westmead Westmead Australia Recruiting

voxsanity.com.au · trial sites from public registries · registry record synced 11 October 2026 · not medical advice

Who can join

Age 6 Years and over
Sex Anyone, regardless of sex
Healthy volunteers Not accepted
Enrolment target 134

The official eligibility criteria

Registry text, reproduced exactly. These are the words the trial's sponsor published on ClinicalTrials.gov. They have not been edited, shortened or rewritten, and they are written for researchers rather than for patients.

Inclusion Criteria:

* 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.

Exclusion Criteria:

* Has a diagnosis of sleep apnea (OSA, CSA) that is not adequately controlled

* Has a diagnosis of hypersomnia due to another sleep/medical disorder

* 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

Dates on the record

Started 28 May 2024
Estimated completion 1 April 2027
Registry last updated 25 August 2026
Checked by Voxsanity 11 October 2026

Results, publications and the official record

Sources and dates

  • ClinicalTrials.gov – the record this page reformats
  • ClinicalTrials.gov processing date: 25 August 2026.
  • This page last checked by Voxsanity: 11 October 2026.

Voxsanity reformats data from public registries into this layout. It does not edit, interpret or add to what the registry published.

Not medical advice.

Individual trial records are refreshed on a rolling basis rather than all at once, so a record may be up to several weeks old. Each trial page and trial card shows the date its own record was last synced. Where a record has lagged, its status, sites and enrolment can differ from the current registry state in either direction, so check the registry link on the trial page before acting on them.

Letter for your doctor

A one-page summary of this trial to print or email to your GP. It carries the registry's own record of the trial and its eligibility criteria, and nothing Voxsanity has written about whether it suits you.