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cleminorexton

Phase 2

Narcolepsy Type 1 | Small molecule | Neurology |Centessa Pharmaceuticals plc|Last Updated: Aug 11, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment222

FDA Designations

No designations recorded

Clinical trial landscape

cleminorexton · 1 trial · 2 indications

Phase 2 1
NCT07598708A Study to Investigate the Effects of Cleminorexton Compared With Placebo in the Treatment of Participants With Central Disorders of HypersomnolenceNarcolepsy Type 1
RECRUITING222 Analytics
PHASE2RECRUITING
A Study to Investigate the Effects of Cleminorexton Compared With Placebo in the Treatment of Participants With Central Disorders of Hypersomnolence
Narcolepsy Type 1Unlock trial analytics

Study Endpoints

Primary Endpoints

Change from baseline in mean sleep latency (average of the first 4 trials) on the Maintenance of Wakefulness Test (MWT)
Baseline to week 12

Secondary Endpoints

Change from baseline in Epworth Sleepiness Scale (ESS) total score
Baseline to Week 12
Weekly Cataplexy Rate (WCR)
Week 12
Change from baseline in Narcolepsy Severity Scale for Clinical Trials (NSS-CT)
Baseline to Week 12
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Group A - Narcolepsy Type 1 (Dose 1)EXPERIMENTAL -
Group A - Narcolepsy Type 1 (Dose 2)EXPERIMENTAL -
Group A - Narcolepsy Type 1 (placebo)PLACEBO_COMPARATOR -
Group B - Narcolepsy Type 2 (Dose 1)EXPERIMENTAL -
Group B - Narcolepsy Type 2 (Dose 2)EXPERIMENTAL -
Group B - Narcolepsy Type 2 (placebo)PLACEBO_COMPARATOR -

Interventions

NameTypeDescription
cleminorextonDRUGOral cleminorexton capsule
PlaceboDRUGmatching placebo capsule
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Eligibility Criteria

Age Range18 Years to 70 Years
SexALL
Healthy VolunteersNo
Study Sites15

Key Inclusion Criteria: * 18-70 years of age * Body Mass Index (BMI) within the range ≥ 17.0 and ≤ 45 kg/m\^2 (inclusive) * Meets the diagnostic criteria of Narcolepsy Type 1 (NT1) or Type 2 (NT2) according to International Classification of Sleep Disorders, 3rd edition, Text Revision edition (ICSD...

Countries:United States
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Recent Changes (Last 90 Days)

LOWAug 11, 2026NCT07598708lastUpdatePostDate: changed
LOWAug 11, 2026NCT07598708lastUpdatePostDate: changed
LOWJul 29, 2026NCT07598708lastUpdatePostDate: changed
LOWJul 29, 2026NCT07598708lastUpdatePostDate: changed
LOWJul 13, 2026NCT07598708lastUpdatePostDate: changed
LOWJul 13, 2026NCT07598708lastUpdatePostDate: changed
LOWJul 2, 2026NCT07598708startDate: changed
LOWJul 2, 2026NCT07598708startDate: changed
LOWJul 2, 2026NCT07598708startDate: changed
LOWJul 2, 2026NCT07598708startDate: changed
LOWJun 8, 2026NCT07598708lastUpdatePostDate: changed
LOWJun 8, 2026NCT07598708lastUpdatePostDate: changed
LOWJun 8, 2026NCT07598708lastUpdatePostDate: changed

Frequently asked questions about cleminorexton

What is cleminorexton used for?

Cleminorexton is an investigational small molecule being developed for the treatment of narcolepsy Type 1. It is currently in Phase 2 clinical development and is not yet approved by regulatory authorities. The drug is being studied in patients with central disorders of hypersomnolence, including narcolepsy Type 1 and Type 2.

Who makes cleminorexton?

Cleminorexton is being developed by Centessa Pharmaceuticals plc, a biopharmaceutical company traded on the NASDAQ under the ticker symbol CNTA. The company is conducting clinical trials to evaluate the safety and efficacy of cleminorexton in patients with narcolepsy.

What phase is cleminorexton in?

Cleminorexton is currently in Phase 2 clinical development. It is an investigational drug and has not been approved by the FDA or any other regulatory agency. The ongoing Phase 2 trial is recruiting participants to study the drug's effects compared with placebo in patients with central disorders of hypersomnolence.

What clinical trials is cleminorexton in?

Cleminorexton is being studied in a Phase 2 clinical trial registered as NCT07598708. This randomized, double-blind, placebo-controlled study is investigating the effects of cleminorexton compared with placebo in participants with central disorders of hypersomnolence, including narcolepsy Type 1 and Type 2. The trial is recruiting 222 participants in the United States.

How does cleminorexton work?

Cleminorexton is a small molecule, but its specific molecular target has not been disclosed in available information. The drug is being studied for its effects on symptoms of narcolepsy, a neurological disorder characterized by excessive daytime sleepiness and sudden loss of muscle tone.