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Carbetocin

Phase 3

Hyperphagia in Prader-Willi Syndrome | Small molecule | Other |ACADIA Pharmaceuticals Inc.|Last Updated: Dec 3, 2025

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDDMCBiomarker
Total Trials2
Total Enrollment330
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06420297OLE Study of Carbetocin Nasal Spray for the Treatment of Hyperphagia in Prader-Willi SyndromePHASE3 ENROLLING BY_INVITATION 160Mar 11, 2024Jun 1, 2029Dec 3, 202530 United States, Canada +4
NCT06173531Study of Carbetocin Nasal Spray for the Treatment of Hyperphagia in Prader-Willi SyndromePHASE3 ACTIVE NOT_RECRUITING 170Nov 27, 2023Nov 1, 2025Sep 10, 202530 United States, Canada +4
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Study Endpoints
Primary Endpoints
Treatment-emergent adverse events (TEAEs), serious adverse events (SAEs), withdrawals due to adverse events (AEs), potentially clinically important changes in other safety assessments, device incidents or device malfunctions
Baseline to 36 months

Treatment-emergent adverse events (TEAEs) and device incidents or device malfunctions, TEAEs leading to discontinuation, TEAEs related to study drug, TEAEs by maximum severity, fatal TEAEs, treatment-emergent SAEs, and treatment-emergent SAEs related to study drug will all be summarized for all subjects as well as by previous treatment group.

Change from Baseline at Week 12 in caregiver-rated Hyperphagia Questionnaire for Clinical Trials (HQ-CT) score
Baseline to Week 12

The HQ-CT is a nine-item questionnaire designed to be completed by caregivers of subjects with PWS. It is a revision of the 11-item HPWSQ-R and has been further validated. The Foundation for Prader-Willi Research has made the HQ-CT available for clinical studies in PWS, and it is the consensus instrument within the PWS research community for measuring observable behaviors that stem from subjects' excessive drive to eat. The HQ-CT should be completed by the same caregiver throughout the study. The HQ-CT will be administered to the caregiver by a rater using standardized prompts. The Food Safe Zone should be administered immediately before administration of the HQ-CT. A higher score on the HQ-CT indicates greater severity of hyperphagia.

Secondary Endpoints
Change from Baseline at Week 12 in caregiver-rated Clinical Global Impression-Severity (CGI-S) score for PWS
Baseline to Week 12
Clinical Global Impression-Change (CGI-C) for PWS score at Week 12
Score at Week 12
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Drug: CarbetocinEXPERIMENTALCarbetocin nasal spray 3.2 mg three times daily (TID)
CarbetocinEXPERIMENTALCarbetocin nasal spray 3.2 mg three times daily (TID)
PlaceboPLACEBO_COMPARATORPlacebo
Interventions
NameTypeDescription
CarbetocinDRUGCarbetocin nasal spray 3.2 mg three times daily (TID)
PlaceboDRUGPlacebo given TID, identical in appearance respective to carbetocin treatment
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Eligibility Criteria
Age Range5 Years — 30 Years
SexALL
Healthy VolunteersNo
Study Sites30

Inclusion Criteria: * Has completed the Week12/EOT visit of the antecedent, Study ACP-101-302 * Met all entry criteria for the antecedent study * May benefit from long-term treatment with open-label carbetocin in the judgment of the Investigator. * Lives with a caregiver who understands and is will...

Countries:United StatesCanadaFranceGermanySpainUnited Kingdom
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT06420297primaryCompletionDate: changed
LOWMay 26, 2026NCT06173531primaryCompletionDate: changed
LOWMay 24, 2026NCT06420297studyFirstPostDate: changed
LOWMay 24, 2026NCT06173531studyFirstPostDate: changed