A Study Of Pitolisant In Patients With Prader-Willi Syndrome

Overview

About this study

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

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

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

Note: Other protocol defined Inclusion/Exclusion Criteria may apply.

Eligibility last updated 10/21/2026. Questions regarding updates should be directed to the study team contact.

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status Contact

Rochester, Minn.

Mayo Clinic principal investigator

Brendan Lanpher, M.D.

Open for enrollment

Contact information:

Clinical Genomics Research

(507) 538-6151

RSTCGRESEARCH@mayo.edu

More information

Publications

Publications are currently not available