222 Participants NeededMy employer runs this trial

Cleminorexton for Narcolepsy

Recruiting at 16 trial locations
CP
Overseen ByCentessa Pharmaceuticals
Age: 18+
Sex: Any
Trial Phase: Phase 2 & 3
Sponsor: Centessa Pharmaceuticals (UK) Limited
Prior Safety DataThis treatment has passed at least one previous human trial

What You Need to Know Before You Apply

What is the purpose of this trial?

This trial tests a new treatment called cleminorexton for individuals with narcolepsy, a condition causing extreme daytime sleepiness. The goal is to determine if cleminorexton can reduce sleepiness and other symptoms. The trial includes different groups for Narcolepsy Type 1 (with cataplexy) and Type 2 (without cataplexy). Individuals who frequently experience excessive daytime sleepiness and have a narcolepsy diagnosis may be suitable candidates. As a Phase 2 and Phase 3 trial, this research measures the treatment's effectiveness in an initial, smaller group and represents the final step before FDA approval, offering participants a chance to contribute to potentially groundbreaking treatment advancements.

Do I have to stop taking my current medications for the trial?

Yes, you will need to stop taking all medications used for the treatment of narcolepsy to participate in the trial.

Is there any evidence suggesting that this trial's treatments are likely to be safe?

Studies have shown that cleminorexton is generally well-tolerated by people with narcolepsy. Research indicates that this treatment, which mimics a brain protein called orexin, is safe for most users. Some reported side effects, such as trouble sleeping and increased urination, were usually mild and temporary. Thus, while some individuals may experience these effects, they are not typically severe or long-lasting. Additionally, cleminorexton has effectively helped people with narcolepsy feel more awake during the day.12345

Why do researchers think this study treatment might be promising for narcolepsy?

Most treatments for narcolepsy focus on managing symptoms with stimulants like modafinil or sodium oxybate, which primarily promote wakefulness or improve nighttime sleep. But Cleminorexton works differently, targeting orexin receptors in the brain to directly address the root cause of narcolepsy. Researchers are excited about Cleminorexton because it offers a new mechanism of action that could potentially provide more effective and longer-lasting relief for narcolepsy symptoms compared to current options. This innovative approach has the potential to significantly improve the quality of life for those with narcolepsy by addressing the underlying neurological dysfunction.

What evidence suggests that cleminorexton might be an effective treatment for narcolepsy?

Research has shown that treatments similar to cleminorexton, such as oveporexton and alixorexton, yield promising results for narcolepsy. Specifically, studies found that oveporexton significantly reduced excessive daytime sleepiness in individuals with narcolepsy type 1 and also alleviated cataplexy, a condition where emotions trigger sudden muscle weakness. Alixorexton improved wakefulness and reduced daytime sleepiness in those with narcolepsy type 2. These findings suggest that targeting orexin receptors, which help maintain wakefulness, can effectively reduce symptoms in people with narcolepsy. Participants in this trial will receive varying doses of cleminorexton or a placebo to evaluate its effectiveness for both narcolepsy type 1 and type 2.36789

Are You a Good Fit for This Trial?

This trial is for adults aged 18-70 who have been diagnosed with Narcolepsy Type 1 or Type 2, have a BMI between 17 and 45, and are willing to stop their current narcolepsy medications. Participants must be able to follow the study's requirements.

Inclusion Criteria

I am between 18 and 70 years old.
Body Mass Index (BMI) within the range ≥ 17.0 and ≤ 45 kg/m^2 (inclusive)
I am willing and able to stop all my narcolepsy medications.
See 2 more

Exclusion Criteria

I have a serious health condition affecting a major organ or body system.
I do not have another medical condition causing excessive daytime sleepiness.

Timeline for a Trial Participant

Screening

Participants are screened for eligibility to participate in the trial

2-4 weeks

Treatment

Participants receive Cleminorexton or placebo to assess efficacy, safety, and tolerability

12 weeks

Follow-up

Participants are monitored for safety and effectiveness after treatment

4 weeks

What Are the Treatments Tested in This Trial?

Interventions

  • Cleminorexton

Trial Overview

The study compares cleminorexton—a drug designed to help people stay awake—against a placebo in people with narcolepsy. The goal is to see if cleminorexton reduces daytime sleepiness and improves symptoms, as well as how safe it is.

How Is the Trial Designed?

6

Treatment groups

Experimental Treatment

Placebo Group

Group I: Group B - Narcolepsy Type 2 (Dose 2)Experimental Treatment1 Intervention
Group II: Group B - Narcolepsy Type 2 (Dose 1)Experimental Treatment1 Intervention
Group III: Group A - Narcolepsy Type 1 (Dose 2)Experimental Treatment1 Intervention
Group IV: Group A - Narcolepsy Type 1 (Dose 1)Experimental Treatment1 Intervention
Group V: Group B - Narcolepsy Type 2 (placebo)Placebo Group1 Intervention
Group VI: Group A - Narcolepsy Type 1 (placebo)Placebo Group1 Intervention

Find a Clinic Near You

Who Is Running the Clinical Trial?

Centessa Pharmaceuticals (UK) Limited

Lead Sponsor

Trials
2
Recruited
100+

Citations

Phase 2 Published Data of Oveporexton Show Broad ...

Oveporexton significantly improved excessive daytime sleepiness and cataplexy in narcolepsy type 1 patients across all doses compared to placebo ...

Oveporexton improves symptoms in patients with ...

The results from this study found that oveporexton significantly improved measures of wakefulness, sleepiness, and cataplexy over an eight-week period.

Effects of Oveporexton, an Orexin Receptor 2–Selective ...

These findings suggest that OX2R stimulation with oveporexton can improve cognitive symptoms in adults with NT1 Abstract

Alkermes' Alixorexton Shows Positive Phase II Results in ...

Alixorexton showed significant improvements in wakefulness and daytime sleepiness in narcolepsy type 2 patients, achieving primary endpoints in ...

A Comprehensive Review of Current and Emerging ...

After 8 weeks of treatment, all dose groups demonstrated a mean increase in MWT sleep latency of 13.7–26.6 min compared to placebo (adjusted p ≤ 0.001) and a ...

NCT07598708 | A Study to Investigate the Effects of ...

Narcolepsy Type 1 (NT1) and Narcolepsy Type 2 (NT2) are rare conditions that make people feel very sleepy during the day te the Efficacy, Safety, Tolerability, ...

7.

pubmed.ncbi.nlm.nih.gov

pubmed.ncbi.nlm.nih.gov/40367374/

Oveporexton, an Oral Orexin Receptor 2-Selective Agonist, ...

In this phase 2 trial involving participants with narcolepsy type 1, oveporexton significantly improved measures of wakefulness, sleepiness, and cataplexy over ...

Oveporexton Improves Excessive Daytime Sleepiness in ...

The safety profile of oveporexton was comparable to that observed in a phase 2b study. The most common adverse events reported were insomnia, ...

cleminorexton (ORX750) / Centessa

Treatment of Patients with Narcolepsy (type 1 and 2) ORX750 was well tolerated, and normative wakefulness