ORX142 in healthy adults aged 18–80
Official title: A Randomized, Double-blind, Sponsor-open, Placebo-controlled Study of the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Food Effect of Single and Multiple Ascending Doses of ORX142 in Healthy Adults, Single Doses of ORX142 in Healthy Older Adults, and a Single Dose Crossover, Proof-of-concept Study of ORX142 in Acutely Sleep-deprived Healthy Subjects
Run by Centessa Pharmaceuticals (UK) Limited · NCT07082829 · Data updated 2026-11-12
This trial tests ORX142, an orexin-2 receptor agonist, to see if it is safe, well tolerated, and how the body processes it in healthy adults aged 18–80.
Quick facts
| Phase | Phase 1 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years to 80 Years |
| Sex | All |
| Enrollment | 208 (estimated) |
| Sponsor | Centessa Pharmaceuticals (UK) Limited Industry-sponsored |
| Locations | 3 sites (Lincoln, Nebraska and 2 other locations) |
| Status | Recruiting |
| Started | June 30, 2025 |
| Main results expected | June 15, 2026 |
| Study ends | June 15, 2026 |
| Registry record updated | December 24, 2025 |
| Trial ID | NCT07082829 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are healthy adults within the study age windows (18–55 for most parts, 60–80 for the older cohort) with no significant medical conditions, no clinically significant sleep disorders, and no history of seizures.
✕Probably not a fit
People with significant cardiac, pulmonary, hepatic, renal, neurological, or psychiatric disease, a history of seizures, or clinically significant sleep disorders such as insomnia or sleep apnea are unlikely to be eligible or to benefit from participation.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This Phase 1 study gives single and multiple oral doses of ORX142 or matching placebo to healthy adult volunteers to characterize safety, tolerability, and pharmacokinetics. Most study parts enroll adults 18–55, with a separate older cohort enrolling ages 60–80 in Part D. Participants are screened to exclude significant medical or sleep disorders and seizure risk, and will undergo clinical assessments, safety monitoring, and blood sampling for drug levels. The study is conducted at three U.S. sites in Nebraska, New Jersey, and New York.
Why it matters
Potential benefit: If successful, ORX142 could provide a new treatment option to reduce excessive daytime sleepiness by activating orexin-2 receptors.
How similar studies have gone: Early clinical work with other orexin-2 receptor agonists has shown wake-promoting effects in small studies, but clinical experience remains limited.
Who can join: the full rules
Show full inclusion / exclusion criteria
Key Inclusion Criteria: 1. Healthy males or females as determined by assessments at the Screening Visit. For Parts A, B, C, and E: a. Participants must be at least 18 years of age and no more than 55 years of age at the Screening 2. For Part D: a .Participants must be at least 60 years of age and no more than 80 years of age at the Screening Key Exclusion Criteria: 1. Presence of significant cardiac, pulmonary, gastrointestinal, hepatic, renal, hematological, malignancy, endocrine, neurological, or psychiatric disease, as determined by medical history, physical examination, and screening investigations. 2. History of seizure disorder, any other condition that increases the risk of seizure 3. Has a clinically significant sleep disorder, including insomnia or sleep apnea.
Where it's running
-
Site #1
Lincoln, Nebraska, United States Recruiting -
Site #2
Eatontown, New Jersey, United States Recruiting -
Site #3
New York, New York, United States Recruiting
Study contacts
- Study coordinator: ORX142 Centessa Program Lead
- Email: ORX142-0101study@centessa.com
- Phone: 617-468-5770
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.