Actively Recruiting

Phase 2
Age: 18Years - 65Years
All Genders
ID07096674

A Long-term Phase 2 Extension Study Evaluating Safety and Efficacy of ORX750 in Participants With Narcolepsy Type 1, Type 2, and Idiopathic Hypersomnia Who Completed Prior ORX750 Trials

Led by Centessa Pharmaceuticals (UK) Limited · Updated on 2026-04-16

90

Participants Needed

24

Research Sites

37 weeks

Total Duration

On this page

AI-Summary

What this Trial Is About

This research focuses on participants with narcolepsy type 1, narcolepsy type 2, and idiopathic hypersomnia. It is a long-term extension study following a previous trial, aiming to evaluate the long-term safety, tolerability, and effectiveness of the drug ORX750 in these conditions. The study is part of a Phase 2 clinical trial program specifically involving participants who completed the initial parent study. Participants will receive oral ORX750 during the long-term extension period. This open-label study continues treatment with ORX750, allowing researchers to observe its effects over an extended time without a placebo comparison. The study builds upon prior treatment to assess ongoing outcomes and safety. During the study, participants will be closely monitored for any treatment-emergent adverse events, serious adverse events, abnormal lab tests, changes in vital signs, abnormal ECG results, and any signs of suicidal thoughts or behavior up to day 70. The study requires participants to adhere to protocol requirements and will assess their continued safety and response to ORX750 throughout the treatment period.

CONDITIONS

Official Title

A Long-term Extension Study of ORX750 in Participants With Narcolepsy and Idiopathic Hypersomnia

Who Can Participate

Age: 18Years - 65Years
All Genders

Eligibility Criteria

Eligible

You may qualify if you...

  • Diagnosis of narcolepsy type 1, narcolepsy type 2, or idiopathic hypersomnia
  • Completed the full treatment period in the parent study ORX750-0201 (CRYSTAL-1)
  • Willing and able to follow additional study requirements
Not Eligible

You will not qualify if you...

  • Development of any new disease or disorder that prevents continued participation
  • Unable to stop excluded medications, including those for narcolepsy or idiopathic hypersomnia

AI-Screening

AI-Powered Screening

Complete this quick 3-step screening to check your eligibility

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Trial Site Locations

Total: 24 locations

1

Auburn, alabama

Auburn, Alabama, United States, 36832

Actively Recruiting

2

Santa Ana, California

Santa Ana, California, United States, 92705

Actively Recruiting

3

Miami, Florida

Miami, Florida, United States, 33176

Actively Recruiting

4

Orlando, Florida

Orlando, Florida, United States, 32807

Actively Recruiting

5

Winter Park, FL

Winter Park, Florida, United States, 32789

Actively Recruiting

6

Stockbridge, GA

Atlanta, Georgia, United States, 30281

Actively Recruiting

7

Atlanta, Georgia

Atlanta, Georgia, United States, 30328

Actively Recruiting

8

Sterling Heights, Michigan

Sterling Heights, Michigan, United States, 48314

Actively Recruiting

9

Hendersen, Navada

Henderson, Nevada, United States, 89052

Actively Recruiting

10

Henderson, Nevada

Henderson, Nevada, United States, 89052

Actively Recruiting

11

Denver, North Carolina

Denver, North Carolina, United States, 28037

Actively Recruiting

12

Huntersville, North Carolina

Huntersville, North Carolina, United States, 28070

Actively Recruiting

13

Cincinnati, Ohio

Cincinnati, Ohio, United States, 45245

Actively Recruiting

14

Dublin

Dublin, Ohio, United States, 43017

Actively Recruiting

15

Abington, Pennsylvania

Abington, Pennsylvania, United States, 19046

Actively Recruiting

16

Willow Grove, Pennsylvania

Willow Grove, Pennsylvania, United States, 19090

Actively Recruiting

17

North Charleston, South Carolina

North Charleston, South Carolina, United States, 29406-9196

Actively Recruiting

18

Austin, Texas

Austin, Texas, United States, 30328

Actively Recruiting

19

El Paso, Texas

El Paso, Texas, United States, 79912

Actively Recruiting

20

Toronto

Toronto, Ontario, Canada, M5S 3A3

Actively Recruiting

21

Bologna

Bologna, BO, Italy, 40139

Actively Recruiting

22

Verona

Verona, VR, Italy, 37134

Actively Recruiting

23

Móstoles, Madrid

Móstoles, Madrid, Spain, 28938

Actively Recruiting

24

Álava, Spain

Álava, Spain, 01004

Actively Recruiting

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Research Team

O

Orexin Centessa Program Lead

How is the study designed?

Study Type

INTERVENTIONAL

Masking

NONE

Allocation

NON_RANDOMIZED

Model

SINGLE_GROUP

Primary Purpose

TREATMENT

Number of Arms

3

Frequently Asked Questions

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