NCT07633301 · Takeda
A Study of TAK-360 in Adults With Narcolepsy Type 1 (Narcolepsy With Cataplexy)
What this study is about
Narcolepsy is a sleep disorder that disrupts a person's regular sleep-wake cycle. It causes extreme sleepiness during the day (called excessive daytime sleepiness \[EDS\]), where a person may fall asleep without warning. Narcolepsy Type 1 (NT1) is a form of the condition in which people also have sudden, unexpected muscle weakness while staying conscious (called cataplexy).
View original scientific description
Narcolepsy is a sleep disorder that disrupts a person's regular sleep-wake cycle. It causes extreme sleepiness during the day (called excessive daytime sleepiness \[EDS\]), where a person may fall asleep without warning. Narcolepsy Type 1 (NT1) is a form of the condition in which people also have sudden, unexpected muscle weakness while staying conscious (called cataplexy). The main aim of this study is to learn how safe TAK-360 is and how well adults with NT1 tolerate it. Adults who can participate in the study will have to stop taking their existing medicines for NT1 before study treatment starts. Participants may be randomly (by chance, like drawing names from a hat) assigned to get either TAK-360 or placebo during the treatment period. The placebo looks just like TAK-360 but does not have any medicine in it. After the treatment period, participants can be monitored for another 2 weeks. Participants can restart their usual NT1 treatment after study treatment ends. The participants will have to visit the clinic multiple times during this study.
Interventions
DRUG
TAK-360
TAK-360 tablet
DRUG
Placebo
TAK-360 matching placebo tablet
Primary outcome measures
Parts A, B and C: Number of Participants With at Least One Treatment-emergent Adverse Events (TEAEs)
Time frame: Up to approximately 28 weeks
An adverse event (AE) is any untoward medical occurrence in a clinical trial participant, temporally associated with the use of the trial intervention, whether or not the occurrence is considered related to the trial intervention. 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.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- The participant has a body mass index within the range 18 to 40 kilograms per meter square (kg/m\^2) (inclusive).
- The participant has an International Classification of Sleep Disorders, Third Edition (ICSD-3) or ICSD-3 Text Revision diagnosis of NT1. Key
Exclusion criteria
- The participant has a current medical disorder, other than narcolepsy with cataplexy, associated with excessive daytime sleepiness.
- The participant: (a) has a history of myocardial infarction; (b) has a history of clinically significant thyroid disease, coronary artery disease, cardiac rhythm abnormality or heart failure.
- The participant has a clinically significant history of head injury or head trauma.
- The participant has a history of epilepsy, seizure, or convulsion (except 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.
- The participant has a history of cancer in the past 5 years (does not apply to participants with carcinoma in situ that has been resolved without further treatment or basal cell carcinoma; these participants may be included after approval by the medical monitor).
- The participant has a positive test result for hepatitis B surface antigen, hepatitis B core antibody, hepatitis C virus antibody, or human immunodeficiency virus (HIV) antibody/antigen at screening.
- The participant plans to participate in any other interventional trial while participating in TAK-360-2004 or has previously participated in another part in TAK-360-2004.
- The participant has a known hypersensitivity to any component of the formulation of TAK-360 or related compounds.
Where
- Redwood City, California
- Miami, Florida
- Cincinnati, Ohio
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jun 29, 2026 · Source of record for eligibility and locations