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A Study to Detect the Radioactivity of 14C-SEP-380135 in Urine and Feces in Healthy Male Adults

A Phase 1 Trial to Assess the Mass Balance and Pharmacokinetics of a Single Oral Administration of 14C-SEP-380135 in Healthy Male Adults

Status
Not yet recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07455084
Enrollment
8
Registered
2026-03-06
Start date
2026-03-20
Completion date
2026-05-03
Last updated
2026-03-06

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

Conditions

Schizophrenia

Keywords

Mental Health Conditions, Schizophrenia

Brief summary

The purpose of the present trial is to obtain information on the absorption, distribution, metabolism, excretion and pharmacokinetics (PK) of 14C-SEP-380135 and its metabolites following a single oral dose.

Interventions

DRUG14C-SEP-380135

Oral Capsule

Sponsors

Otsuka Pharmaceutical Development & Commercialization, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
MALE
Age
18 Years to 55 Years
Healthy volunteers
Yes

Inclusion criteria

1. Body mass index (BMI) between 18.0 and 32.0 kilograms per square meter (kg/m²). 2. In good overall health, based on: 1. Medical history 2. Physical examination 3. Neurological examination 4. Vital signs 5. Electrocardiogram (ECG) 6. Blood and urine tests (serum chemistry, hematology, urinalysis, serology) 3. Regular daily bowel movements (at least one per day) for 30 days before Day -2. 4. Ability to provide written informed consent and follow all study instructions. 5. Has a stable living situation at screening and agrees to return to a similar living arrangement after the in-clinic stay.

Exclusion criteria

1. Have taken an investigational drug within 30 days or 5 half-lives, if known, (whichever is longer) prior to screening. 2. Have had prior exposure to SEP-380135. 3. Are currently participating in another clinical trial. 4. Attempted suicide within 12 months prior to screening. 5. A history of sick sinus syndrome, any degree of atrioventricular block, Heart attack (myocardial infarction), heart failure (NYHA Class II-IV), cardiomyopathy, pulmonary congestion, cardiac arrhythmias, prolonged QT interval, congenital long QT syndrome, family history of long QT, or moderate to severe hypokalemia. A participant with non-clinically significant ECG abnormalities at screening and check-in requires approval from the medical monitor and the sponsor's physician. 6. Are predicted poor metabolizer CYP2D6 phenotypes. Note: Other protocol-specified inclusion/

Design outcomes

Primary

MeasureTime frame
Total Radioactivity Amount Excreted in Urine (Ae,u)Up to Day 8
Total Radioactivity Amount Excreted in Feces (Ae,f)Up to Day 8
Fraction of Dose Excreted in Urine (%fe,u)Up to Day 8
Fraction of Dose Excreted in Feces (%fe,f)Up to Day 8

Secondary

MeasureTime frame
Elimination Half-Life (t1/2,z) of SEP-380135 and MetabolitesUp to Day 8
Apparent Clearance of Drug From Plasma After Oral Administration (CL/F) of SEP-380135Up to Day 8
Apparent Clearance of Drug From Plasma After Oral Administration Adjusted for Body Weight (CL/F/BW) of SEP-380135Up to Day 8
Volume of Distribution Following Oral Administration (Vz/F) of SEP-380135Up to Day 8
Number of Participants with Adverse Events (AEs)Up to Day 31
Number of Participants with Potentially Clinically Significant Changes in Vital SignsUpto Day 8
Number of Participants With Potentially Clinically Significant Changes in Electrocardiogram (ECG) ParametersUpto Day 8
Number of Participants With Potentially Clinically Significant Changes in Physical ExaminationsUpto Day 8
Number of Participants With Potentially Clinically Significant Changes in Clinical Laboratory Test ParametersUpto Day 8
Time for Cmax (tmax) of SEP-380135 and MetabolitesUp to Day 8
Number of Participants With Incidence of Suicidal Ideation and Suicidal Behavior Using the Columbia-Suicide Severity Rating Scale (C-SSRS)Upto Day 8
Area Under the Concentration-Time Curve From Time Zero to the Last Observable Concentration at Time (AUCt) of SEP-380135 and MetabolitesUp to Day 8
Maximum Plasma Concentration (Cmax) of SEP-380135 and MetabolitesUp to Day 8
Area Under the Concentration-Time Curve From Time Zero to Infinity (AUC∞) of SEP-380135 and MetabolitesUp to Day 8

Countries

United States

Contacts

CONTACTOtsuka Call Center
Otsuka-ProfessionalServices@otsuka-us.com844-687-8522

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 7, 2026