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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

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2023-508307-21-00
Acronym
HBS-101-CL-312
Enrollment
115
Registered
2025-02-10
Start date
2025-03-19
Completion date
Unknown
Last updated
2025-07-25

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Prader-Willi syndrome

Brief summary

Efficacy: Change in severity of EDS as measured by PROMIS SRI T-score from Baseline to the end of the Double Blind Treatment Period (Day 77)

Detailed description

Efficacy: Change in severity of irritable and disruptive behaviors as measured by ABC-C Irritability Domain score from Baseline to the end of the Double-Blind Treatment Period (Day 77), Efficacy: Change in overall severity of EDS as measured by the CaGI-S for EDS score from Baseline to the end of the Double-Blind Treatment Period (Day 77), Efficacy: Change in overall severity of EDS as measured by the CGI-S for EDS score from Baseline to the end of the Double-Blind Treatment Period (Day 77), Efficacy: Change in overall severity of irritable and disruptive behaviors as measured by the CaGI-S for Irritable and/or Disruptive Behaviors score from Baseline to the end of the Double-Blind Treatment Period (Day 77), Efficacy: Change in severity of hyperphagia as measured by HQ CT score in conjunction with the FSZQ score, from Baseline to the end of the Double-Blind Treatment Period (Day 77), Efficacy: Change in severity of EDS as measured by ESS CHAD (parent/caregiver version) total score from Baseline to the end of the Double-Blind Treatment Period (Day 77), Efficacy: Change in severity of other behavioral problems as measured by the ABC-C Hyperactivity/Noncompliance, Inappropriate Speech, Social Withdrawal, and Stereotypic Behavior Domain scores from Baseline to the end of the Double-Blind Treatment Period (Day 77), Safety and Pharmacokinetic: Percentage of patients reporting TEAEs during each study period and during the entire study, Safety and Pharmacokinetic: Measured concentration of pitolisant

Interventions

DRUGWhite
DRUGround
DRUGplain
DRUGbiconvex film-coated tablet. Matching 4.45 mg tablet is 3.7 mm in diameter.
DRUGHBS-101
DRUGWAKIX
DRUGbiconvex film-coated tablet. matching 17.8 mg tablet is 7.5 mm in diameter.

Sponsors

Harmony Biosciences LLC
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
0 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Efficacy: Change in severity of EDS as measured by PROMIS SRI T-score from Baseline to the end of the Double Blind Treatment Period (Day 77)

Secondary

MeasureTime frame
Efficacy: Change in severity of irritable and disruptive behaviors as measured by ABC-C Irritability Domain score from Baseline to the end of the Double-Blind Treatment Period (Day 77), Efficacy: Change in overall severity of EDS as measured by the CaGI-S for EDS score from Baseline to the end of the Double-Blind Treatment Period (Day 77), Efficacy: Change in overall severity of EDS as measured by the CGI-S for EDS score from Baseline to the end of the Double-Blind Treatment Period (Day 77), Efficacy: Change in overall severity of irritable and disruptive behaviors as measured by the CaGI-S for Irritable and/or Disruptive Behaviors score from Baseline to the end of the Double-Blind Treatment Period (Day 77), Efficacy: Change in severity of hyperphagia as measured by HQ CT score in conjunction with the FSZQ score, from Baseline to the end of the Double-Blind Treatment Period (Day 77), Efficacy: Change in severity of EDS as measured by ESS CHAD (parent/caregiver version) total score from

Countries

Belgium, Czechia, Denmark, France, Germany, Italy, Poland, Romania, Spain, Sweden

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026