If you need support right now
This page includes language about suicide and self-harm, because that is how the trial's eligibility criteria are written. If reading it has been hard, you do not have to keep going. The services below are free, confidential, and answered by people trained for exactly this.
If you or someone else is in immediate danger, call 000.
- Lifeline — 24/7 crisis support: 13 11 14
- Suicide Call Back Service — 24/7 counselling: 1300 659 467
- 13YARN — 24/7, for Aboriginal and Torres Strait Islander people: 13 92 76
- Beyond Blue — 24/7 mental health support: 1300 22 4636
- Kids Helpline — 24/7, free and private for anyone aged 5 to 25: 1800 55 1800
- headspace — mental health support for 12 to 25 year olds: headspace.org.au
- Emergency: 000
Outside Australia? The numbers above are Australian and will not work from overseas. Find a Helpline is a free directory of crisis lines in over 130 countries, run by ThroughLine with the International Association for Suicide Prevention. If you are in immediate danger, call your local emergency number.
Voxsanity is not a crisis service, and nothing on this page is medical advice. More Australian services are listed on our support lines page.
Phase 2 study for people with Obesity
Not yet recruiting Phase 2
This trial at a glance
Where this trial is running
| Site | City | State or country | Status at this site |
|---|---|---|---|
| Royal Prince Alfred Hospital | Sydney | NSW | Status not stated |
| Alfred Health | Melbourne | VIC | Status not stated |
voxsanity.com.au · trial sites from public registries · registry record synced 11 October 2026 · not medical advice
Who can join
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:
* Participant must be aged 18-65 years (both inclusive).
* Genetically confirmed diagnosis of Prader Willi Syndrome via standard DNA testing or other commonly approved methods.
* Willing and able to provide voluntary written informed consent, or have a Legally Authorized Representative who is able to provide consent.
* Moderate to severe hyperphagia as defined by a HQ-CT score ≥ 13 at time of randomization (Visit 3).
* If participant is receiving growth hormone, the subject must be on the same medication and stable dose for at least 90 days prior to Visit 1.
* Female participant of childbearing potential must have a negative urine pregnancy test at baseline. Participants of childbearing or child-fathering potential must be willing to use medically acceptable forms of birth control, which includes abstinence, while in this study and for 90 days after the last dose of study drug.
* Participant and/or caregiver has the ability to be compliant with study requirements, including visit schedule, diary completion and study drug accountability.
* If a caregiver assists in completion of questionnaires, the same caregiver is available to complete the questionnaires throughout the duration of the study.
Exclusion Criteria:
* Participant has used metabolic agents known to affect appetite within 3 months of Visit 1.
* Participant use of psychotropic medications including SSRIs/SNRIs, monoamine-oxidase inhibitors, tricyclic antidepressants, other serotonergic agonists or antagonists (antipsychotics), and other agents which have known Serotonin Syndrome risk (e.g. mirtazapine) within 1 month of Visit 1.
* Participant has implementation of new food restrictions or new environmental restrictions within 1 month of Visit 1.
* Participant has participated in an interventional clinical trial of any Prader-Willi Syndrome agent within 3 months of Visit 1 or any other investigational agent within 1 month of Visit 1.
* Participant has current or past history of cardiovascular or cerebrovascular disease, such as cardiac valvulopathy, pulmonary hypertension, myocardial infarction or stroke, or clinically significant structural cardiac abnormality.
* Participant has moderate or severe hepatic impairment. Asymptomatic participants with mild hepatic impairment (elevated liver enzymes \< 3x upper limit of normal (ULN) and/or elevated bilirubin \<2x ULN) may be entered into the study after review and approval by the Medical Monitor in conjunction with the sponsor, in consideration of comorbidities and concomitant medications.
* Participant has severe renal impairment (estimated glomerular filtration rate \<30mL/min/1.73m2).
* Participant has clinically significant ECG abnormality such as QTcF \>450 msec (males) or \>470 msec (females).
* Participant has a history of drug or alcohol abuse within the last 12 months or a positive urine drug screen.
* A current C-SSRS score of 4 or 5 at Visit 1 or history of suicide attempt at any time during the past year.
* Participant has a clinically significant condition or has had clinically relevant symptoms or a clinically significant illness in the 4 weeks prior to Visit 1, other than PWS, that would negatively impact study participation, collection of study data, evaluation of study endpoints or pose a risk to the participant, in the opinion of the Investigator.
* Participant is pregnant (determined by a positive urine pregnancy test) or lactating female.
* Any condition that is thought to be a degenerative neurological disease.
Dates on the record
Results, publications and the official record
- No results are posted on the official record yet.
- No publications are listed on the official record yet.
- Official record and contacts on ClinicalTrials.gov – contact details for each site are kept there, and are not copied onto this page.
Sources and dates
- ClinicalTrials.gov – the record this page reformats
- ClinicalTrials.gov processing date: 5 December 2025.
- 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.