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A Study of TAK-861 in Healthy Adults and Subjects With Narcolepsy Type 1

A Randomized, Double-blind, Placebo-Controlled Study to Assess the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Single and Multiple Doses of TAK-861 in Healthy Adult and Elderly Subjects and Subjects With Narcolepsy Type 1

Status
Active, not recruiting
Phases
Phase 1
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2071210007
Enrollment
173
Registered
2021-04-08
Start date
2021-04-02
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy Volunteers

Interventions

Part A: SRD in Japanese Healthy Adults Single dose: TAK-861 or placebo-matching, on Day 1, and will be discharged on Day 6. Subsequent dose levels will be determined by emerging safety, tolerability,

Sponsors

Nonomura Hidenori
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Healthy Adult Participants for Part A, B, C: 1. Must be normotensive, with no history of hypertension or use of antihypertensive medication. Blood pressure (BP) must be less than (=50 kg at the screening visit. Healthy Elderly Participants (Part C): 5. Must be aged >=65 years, inclusive, at the screening visit. 6. Must have a body weight >=40 kg at the screening visit. Participants With NT1 (Parts D): 7. Must be aged 18 to 64 years, inclusive, at the time of informed consent. 8. Must have a diagnosis of NT1 by polysomnography (PSG)/multiple sleep latency test (MSLT) performed within the past 10 years meeting the minimal acceptable criteria for the proper performance of PSG/MSLT as outlined by the ICSD-3 criteria. 9. ESS score must be >=10 at Day -1. 10. Must be willing to discontinue all medications used for the treatment of NT1. 11. The participant must have a BMI >=18.0 and =<40 kg/m2 at the screening visit. 12. The participant must have BP <140 mm Hg (systolic) and <90 mm Hg (diastolic) at the screening visit and Day -2.

Exclusion criteria

Exclusion criteria: All Participants: 1. Have a known hypersensitivity to any component of the formulation of TAK 861 or related compounds. 2. Consumes excessive amounts, defined as greater than 600mg of caffeine of coffee, tea, cola, energy drinks, or other caffeinated beverages per day. Participants With NT1 for Parts D - Additional Criteria 3. Have a medical disorder, other than narcolepsy, associated with EDS. 4. Have any other medical condition, such as anxiety, depression, heart disease, or hepatic, pulmonary, or renal disease, that requires the participant to take excluded medications or at the time of screening the participant is being treated with nasal/oronasal PAP for any reason. 5. Have a nicotine dependence that is likely to have an effect on sleep (eg, a participant who routinely awakens at night to smoke) and/or an unwillingness to discontinue all smoking and nicotine use during the confinement portions of the study.

Design outcomes

Primary

MeasureTime frame
1.Number of Participants Reporting one or More Treatment-emergent Adverse Events (TEAEs) Time Frame: Part A: Baseline up to Day 9 (single dose) and Day 23 (food effect); Parts B and C: Baseline up to Day 21; Part D: Baseline up to Day 56 2.Number of Participants With at Least one Markedly Abnormal Value (MAV) for Laboratory Assessments Post-dose Time Frame: Part A: Baseline up to Day 9 (single dose) and Day 23(food effect); Parts B and C: Baseline up to Day 21; Part D: Baseline up to Day 56 3.Number of Participants With at Least one MAV for Vital Signs Post-dose Time Frame: Part A: Baseline up to Day 9 (single dose) and Day 23 (food effect); Parts B and C: Baseline up to Day 21; Part D: Baseline up to Day 56 4.Number of Participants With at Least one MAV for Electrocardiograms (ECGs) Post-dose Time Frame: Part A: Baseline up to Day 9 (single dose) and Day 23 (food effect); Parts B and C: Baseline up to Day 21; Part D: Baseline up to Day 56

Secondary

MeasureTime frame
1.Pharmacokinetics parameters of TAK-861 and details are to be determined.

Countries

Japan, United States

Contacts

Public ContactTrial Information Contact for Clinical

Takeda Pharmaceutical Company Limited

smb.Japanclinicalstudydisclosure@takeda.com+81-6-6204-2111

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026