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NCT Number: NCT06952699

A Study of TAK-360 in Adults With Narcolepsy Without Cataplexy (NT2)

Narcolepsy without cataplexy or Narcolepsy Type 2 (NT2) is a lifelong condition that makes people very sleepy during the day, regardless of how much sleep they get at night. People with NT2 may fall asleep suddenly, have trouble staying awake during the day, or may not be able to sleep well at night. They may have difficulty thinking clearly, paying attention, or remembering things, during the day. These symptoms can make daily activities like driving, working, or caring for their families challenging, impacting their quality of life. Orexin is a chemical made in the brain that helps keep a person awake and alert. TAK-360 acts like orexin. Previous studies have shown that medicines that act like orexin may keep people awake.

The main aim of this study is to learn how safe TAK-360 is and how well adults with NT2 tolerate it. Researchers also want to find out if TAK-360 can help people with NT2 stay awake and determine the right dosage needed to do that.

Participants will be randomly (by chance, like drawing names from a hat) assigned to get either TAK-360 or placebo in the treatment period. The placebo is a pill that looks just like TAK-360 but does not have any medicine in it. Using a placebo helps researchers learn about the real effect of the treatment.

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Key information

Conditions

Narcolepsy Type 2

Age range

18 year–70 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

Takeda Site 28, Beijing, Beijing Municipality, China

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Key Inclusion Criteria:

  • The participant weighs greater than equal or to (≥)40 kilograms (kg) and has a body mass index (BMI) between 16 and 38 kilograms per meter square (kg/m^2) [inclusive].
  • The participant has a documented, current diagnosis of NT2.

Key Exclusion Criteria:

  • The participant has a current medical disorder associated with excessive daytime sleepiness (EDS) other than NT2.
  • The participant has medically significant thyroid disease.
  • The participant has a history of cancer in the past 5 years. (This exclusion does not apply to participants with carcinoma in situ [such as basal cell carcinoma] that has been treated and is stable, or who have been stable without further treatment. These participants may be included after approval by the medical monitor).
  • The participant has any of the following viral infections based on a positive test result: Hepatitis B surface antigen (at screening), hepatitis C virus (HCV) antibody (at screening), human immunodeficiency virus (HIV) antibody/antigen (at screening).
  • The participant has a clinically significant history of head injury or head trauma.
  • The participant has history of epilepsy, seizure, or convulsion (exception for a single febrile seizure in childhood).
  • The participant has a history of cerebral ischemia, transient ischemic attack (<5 years from screening), intracranial aneurysm, or arteriovenous malformation.

Treatment and study plan

TAK-360

Drug

TAK-360 tablet.

Placebo

Other

TAK-360 matching placebo tablet.

Primary outcomes

  1. Number of Participants With at Least One Treatment-emergent Adverse Event (TEAE)

    Time frame: Up to 15 Weeks

    An adverse event (AE) is any untoward medical occurrence in a clinical investigation participant administered a pharmaceutical product. A TEAE is defined as any event emerging or manifesting at or after the initiation of treatment with a study intervention or medicinal product or any existing event that worsens in either intensity or frequency following exposure to the study intervention or medicinal product.

Secondary outcomes

  1. Change from Baseline at Week 4 in Epworth Sleepiness Scale (ESS) Total Score

    Time frame: Baseline, Week 4

    The ESS provides individuals with 8 different situations of daily life and asks them how likely they are to fall asleep in those situations (scored 0 to 3) and to try to imagine their likelihood of dozing even if they have not actually been in the identical situation; the scores are summed to give an overall score of 0 to 24. Higher scores indicate stronger subjective daytime sleepiness, and scores below 10 are considered to be within the normal range.

  2. Change from Baseline at Week 4 in Mean Sleep Latency on the Maintenance of Wakefulness Test (MWT)

    Time frame: Baseline, Week 4

    The MWT evaluates a person's ability to remain awake under soporific conditions for a defined period of time. Because there is no biological measure of wakefulness, wakefulness is measured indirectly by the inability or delayed tendency to fall asleep. This tendency to fall asleep is measured via electroencephalography-derived sleep latency in the MWT. The MWT consists of four 40-minute sessions done 2 hours apart. Sleep latency in each session will be recorded. Participants will be required to stay awake in between the 4 sessions.

Study contacts

Contact information is provided by the study sponsor or research team.

Takeda Contact

CONTACT

[email protected]

+1-877-825-3327

Sponsors and collaborators

Lead sponsor

Takeda

Industry

Registry information

Official study title

A Randomized, Double-Blinded, Placebo-Controlled, Dose-Finding, Adaptive Trial to Evaluate the Safety, Tolerability, and Efficacy of TAK-360 in Participants With Narcolepsy Without Cataplexy (NT2)

Important dates

Study start
2025
Primary completion
2026
Study completion
2026
First posted
May 1, 2025
Registry last updated
Jul 16, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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