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ORX489

Phase 1

Undisclosed | Small molecule | Other |Centessa Pharmaceuticals plc|Trials Updated: Feb 25, 2026

ORX489 target and mechanism

Molecular targetOX2R
Target classReceptor
ModalitySmall molecule

Also known as ORX489 Tablets

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindCONTROLLEDDMC
Total Trials1
Total Enrollment212

FDA Designations

No designations recorded

ORX489 clinical trials

ORX489 · 1 trial · 1 indication

Phase 1 1
NCT07413666A Study of ORX489 in Healthy Adult Participants, Aged 18 to 60 YearsHealthy Adult Male and Female Volunteers
RECRUITING212 Analytics
PHASE1RECRUITING
A Study of ORX489 in Healthy Adult Participants, Aged 18 to 60 Years
Healthy Adult Male and Female VolunteersUnlock trial analytics

Study Endpoints

Primary Endpoints

Part A
From enrollment to the Follow-Up Visit 7 days post-discharge

Incidence and severity of Treatment-Emergent Adverse Events \[Safety and Tolerability\] as assessed by AEs and SAEs of oral single ascending doses of ORX489 in healthy adult participants.

Part B
From enrollment to the Follow-Up Visit 7 days post-discharge]

Incidence and severity of Treatment-Emergent Adverse Events \[Safety and Tolerability\] as assessed by AEs and SAEs of oral single ascending doses of ORX489 in the fasted and fed states

Part C
From enrollment to the Follow-Up Visit 7 days post-discharge]

Incidence and severity of Treatment-Emergent Adverse Events \[Safety and Tolerability\] as assessed by AEs and SAEs of oral multiple ascending doses of ORX489 in healthy adult participants

Part D:
From enrollment to the Follow-Up Visit 7 days post-discharge

Incidence and severity of Treatment-Emergent Adverse Events \[Safety and Tolerability\] as assessed by AEs and SAEs of oral single oral doses of ORX489 in sleep-deprived healthy adult participants

Secondary Endpoints

Cmax
Pre-dose and multiple post-dose timepoints, up to 48 hours
Tmax
Pre-dose and multiple post-dose timepoints, up to 48 hours
AUClast
Pre-dose and multiple post-dose timepoints, up to 48 hours
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part AEXPERIMENTALSAD Study in Healthy Adults: ORX489 and Placebo
Part BEXPERIMENTALFood-effect Evaluation in Healthy Adults: ORX489
Part CEXPERIMENTALMAD Study in Healthy Adults: ORX489 and Placebo
Part DEXPERIMENTALSAD Study in Acutely Sleep-Deprived Healthy Adults: ORX489 and Placebo

Interventions

NameTypeDescription
ORX489 TabletsDRUGORX489 Tablets
Placebo TabletsOTHERPlacebo Tablets
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Eligibility Criteria

Age Range18 Years to 60 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: * Healthy males or females as determined by assessments at the Screening Visit. * For Parts A, B, C, and D: Participants must be at least 18 years of age and no more than 60 years of age at the Screening Exclusion Criteria: * Presence of significant cardiac, pulmonary, gastroi...

Countries:United States
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Frequently asked questions about ORX489

What is ORX489?

ORX489 is an investigational small molecule drug being developed by Centessa Pharmaceuticals plc. It is currently in Phase 1 clinical development, with one active trial evaluating it in healthy adult participants. The specific medical conditions it is intended to treat have not been disclosed.

What does ORX489 target?

ORX489 targets OX2R, the orexin receptor 2, which belongs to the receptor target class. As a small molecule, ORX489 is designed to interact with this receptor. The therapeutic area for which this mechanism is being developed has not been disclosed.

Who makes ORX489?

ORX489 is being developed by Centessa Pharmaceuticals plc, which trades under the ticker symbol CNTA. The company is the sponsor of the ongoing Phase 1 clinical trial for this asset.

What phase is ORX489 in?

ORX489 is in Phase 1 clinical development. It is an investigational drug and has not been approved by the FDA. One Phase 1 trial is currently recruiting participants.

What clinical trials is ORX489 in?

ORX489 is being evaluated in a single Phase 1 trial, NCT07413666, titled A Study of ORX489 in Healthy Adult Participants, Aged 18 to 60 Years. The trial is currently recruiting, with an estimated enrollment of 212 participants in the United States.

Is ORX489 the same as ORX489 Tablets?

Yes, ORX489 Tablets is an alternative name for ORX489. Both refer to the same investigational small molecule developed by Centessa Pharmaceuticals plc.