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A Study to Assess Adverse Events and Change in Disease Activity of Oral Icalcaprant in Adult Participants With Bipolar I or II Disorder

A Phase 2, Multicenter, 6-Week, Double Blind, Placebo- Controlled Study to Evaluate the Efficacy and Safety of Icalcaprant in Subjects With Bipolar Depression

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06696755
Enrollment
195
Registered
2024-11-20
Start date
2026-02-03
Completion date
2027-11-01
Last updated
2026-04-03

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

Conditions

Bipolar I Disorder, Bipolar II Disorder

Keywords

Bipolar I Disorder, Bipolar II Disorder, Bipolar Disorder, lcalcaprant, ABBV-1354, CVL-354

Brief summary

Bipolar disorder is a severe chronic mood disorder that affects up to 4% of the adult population and 1.8% of the pediatric population in the United States. This study will assess how safe and effective Icalcaprant is in treating adult participants with bipolar I or II disorder. Icalcaprant is an investigational drug being developed for the treatment of depressive episodes in adult participants with bipolar I or II disorder. Participants are placed in 1 of 3 groups, called treatment arms. There is a 1 in 3 chance that a participant will be assigned to a placebo. Around 195 adult participants with bipolar I or II disorder will be enrolled in approximately 35 sites across the United States of America. Participants will receive oral capsules of Icalcaprant or matching placebo once daily for 6 weeks, with a 4-week safety follow-up period. There may be a higher treatment burden for participants in this trial compared to their standard of care. Participants will attend regular visits during the study at a hospital or clinic. The effect of the treatment will be checked by medical assessments, blood tests, checking for side effects and completing questionnaires.

Interventions

Oral Capsules

Oral Capsules

Sponsors

AbbVie
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

* Participants with a diagnosis of bipolar I or II according to the (Diagnostic and Statistical Manual of Mental Disorders (Fifth Edition) DSM-5-TR) without psychotic features, confirmed by the Mini International Neuropsychiatric Interview (MINI) 7.0.2, and currently experiencing an (major depressive episode) MDE beginning at least 4 weeks prior to consent and not exceeding 6 months prior to screening. * Body Mass Index (BMI) is ≥ 18.0 to ≤ 35.0 kg/m\^2. * A condition of general good health, based upon the results of a medical history, physical examination, vital signs, laboratory profile and a 12-lead ECG. * CGI-S-BP score of ≥ 4 for depression and overall bipolar illness at screening (Visit 1) and baseline (Visit 2). * YMRS total score ≤ 12 at screening (Visit 1) and baseline (Visit 2). * Participants on treatment with a single mood stabilizer (lithium, valproate, or lamotrigine), maintained at a stable dose for ≥ 28 days prior to screening. Current mood stabilizer dose must remain unchanged for the duration of the study. * If taking lithium or valproate, participant must have a therapeutic blood level at screening of lithium (0.8 - 1.2 mg/dL) or valproate (50 - 125 mg/dL). * If taking lamotrigine, participant must be taking a locally approved maintenance dose.

Exclusion criteria

* History of an allergic reaction or significant sensitivity to constituents of the study drug (and its excipients) and/or other products in the same class. * History of or active medical conditions(s) that might interfere with the conduct of the study, confound the interpretation of the study results, or endanger the subject's well-being. This includes any unstable condition, history or evidence of malignancy (other than treated basal or squamous cell carcinoma), or any significant hematologic, endocrine, cardiovascular, respiratory, renal, hepatic, gastrointestinal, or neurological disorder (if there is a history of such disease but the condition has been stable for more than 1 year, does not require treatment with prohibited medications, and is judged by the investigator not to interfere with the participant's participation in the study, the participant may be included in the study).

Design outcomes

Primary

MeasureTime frameDescription
Change from Baseline to Week 6 in the MADRS (Montgomery-Åsberg Depression Rating Scale) total scoreUp to approximately Week 6MADRS is a depression rating scale consisting of 10 items representing the core symptoms of depressive illness, each rated 0 (no symptom) to 6 (severe symptom). Total score ranges from 0 (no depression) to 60 (severely depressed).
Number of Participants with Adverse Events (AEs)Up to approximately 10 weeksAn adverse event (AE) is defined as any untoward medical occurrence in a patient or clinical investigation participant administered a pharmaceutical product which does not necessarily have a causal relationship with this treatment. The investigator assesses the relationship of each event to the use of study

Secondary

MeasureTime frameDescription
Change from Baseline to Week 6 in Clinician Global Impression of Severity - Bipolar Disorder (CGI-S-BP) scoreUp to approximately Week 6Clinician Global Impression of Severity - Bipolar Disorder (CGI-S-BP) is a clinician-reported measure of severity of mania, depression, and overall bipolar disorder. Clinicians are asked to consider their total clinical experience with bipolar subjects and assess how severely ill has the participant been during the past 7 days. Response options range from 'Normal, not ill' to 'Very severely ill'.

Countries

United States

Contacts

CONTACTABBVIE CALL CENTER
abbvieclinicaltrials@abbvie.com844-663-3742
STUDY_DIRECTORABBVIE INC.

AbbVie

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Apr 4, 2026