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RecruitingNarcolepsy Type 1Narcolepsy Type 2Idiopathic Hypersomnia

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

Eligible age

18–65 yrs

Accepts

All genders

Locations

11 states

Healthy volunteers

No

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About this study

This study is a long-term extension (LTE) of the parent Study ORX750 0201, and will provide long-term open-label safety, tolerability, and efficacy of ORX750 in participants with narcolepsy type 1 (NT1), narcolepsy type 2 (NT2), and idiopathic hypersomnia (IH).

Sponsor: Centessa Pharmaceuticals (UK) Limited

You may qualify if…

  • Diagnosis of narcolepsy (NT1 or NT2) or IH who was eligible for and completed the full treatment period in the eligible parent study ORX750-0201 (CRYSTAL-1)
  • Is willing and able to adhere to additional protocol requirements

You may not qualify if…

  • Development of any new disease/disorder that in the opinion of the investigator would make the participant unable to continue the study
  • Unable to refrain from excluded medications, including those used for treatment of narcolepsy or idiopathic hypersomnia

Where it's recruiting

Alabama

Auburn

California

Santa Ana

Florida

Miami · Orlando · Winter Park

Georgia

Atlanta

Michigan

Sterling Heights

Nevada

Henderson

North Carolina

Denver · Huntersville

Ohio

Cincinnati · Dublin

Pennsylvania

Abington · Willow Grove

South Carolina

North Charleston

Texas

Austin · El Paso

Source: ClinicalTrials.gov · NCT07096674 · last updated 2026-04-16

A Long-term Extension Study of ORX750 in Participants With Narcolepsy · TrialPath