The purpose of this study is to evaluate the efficacy of JNJ-55308942 compared to placebo on symptoms of depression in participants with bipolar disorder (BD) in a major depressive episode (MDE) at Week 6.



Eligible Ages
Between 18 Years and 64 Years
Eligible Genders
Accepts Healthy Volunteers

Inclusion Criteria

  • Have a primary diagnostic and statistical manual of mental disorders (5th edition) (DSM-5) diagnosis of bipolar disorder (BD) (Type I or II) without current psychotic features, as confirmed by the mini international neuropsychiatric interview (MINI) - Medically stable on the basis of physical examination, medical history, and vital signs performed at screening. Any abnormalities must be consistent with the underlying illness in the study population. This determination must be recorded in the participant's source documents and initialed by the investigator - Have a body mass index (BMI) between 18.0 and 35.0 kilograms per meter square (kg/m^2) inclusive (BMI = weight/height^2) - A woman of childbearing potential (WOCBP) must have a negative highly sensitive serum pregnancy test (beta-human chorionic gonadotropin [beta-hCG]) at screening and a negative urine pregnancy test before the first dose of study intervention

Exclusion Criteria

  • Currently meets the DSM-5 criteria for Manic Episode (ME) on the MINI - Received transcranial magnetic stimulation (TMS), any transcranial electrical stimulation, including transcranial direct current stimulation (tDCS), vagal nerve stimulation (VNS) and/or deep brain stimulation (DBS) within 6 weeks prior to randomization - History of moderate to severe cannabis misuse according to DSM-5 criteria within 6 months before screening - History of malignancy within 5 years before screening (exceptions are squamous and basal cell carcinomas of the skin and carcinoma in situ of the cervix, or malignancy that in the opinion of the investigator is considered cured with minimal risk of recurrence)

Study Design

Phase 2
Study Type
Intervention Model
Parallel Assignment
Primary Purpose
Double (Participant, Investigator)

Arm Groups

ArmDescriptionAssigned Intervention
Participants will receive a JNJ-55308942 capsule once daily for 6 weeks.
  • Drug: JNJ-55308942
    JNJ-55308942 capsules will be administered orally.
Placebo Comparator
Participants will receive a matching placebo capsule once daily for 6 weeks.
  • Drug: Placebo
    Matching placebo capsules will be administered orally.

Recruiting Locations

UAB Huntsville Regional Medical Campus
Huntsville, Alabama 35801

More Details

Janssen Pharmaceutica N.V., Belgium

Study Contact

Study Contact


Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.