Clinical trial Recruiting at 3 sites Phase 1 Interventional Ages 18 to 80

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

PhasePhase 1
Study typeInterventional
Ages18 Years to 80 Years
SexAll
Enrollment208 (estimated)
SponsorCentessa Pharmaceuticals (UK) Limited
Industry-sponsored
Locations3 sites (Lincoln, Nebraska and 2 other locations)
StatusRecruiting
StartedJune 30, 2025
Main results expectedJune 15, 2026
Study endsJune 15, 2026
Registry record updatedDecember 24, 2025
Trial IDNCT07082829 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

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.