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Icalcaprant

Phase 2

Bipolar I Disorder | Small molecule | Psychiatry |AbbVie Inc.|Last Updated: Aug 14, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment195

FDA Designations

No designations recorded

Clinical trial landscape

Icalcaprant · 4 trials · 4 indications

Phase 2 2Phase 1 2
NCT06696755A Study to Assess Adverse Events and Change in Disease Activity of Oral Icalcaprant in Adult Participants With Bipolar I or II DisorderBipolar I Disorder
RECRUITING195 Analytics
NCT07276997A Study to Assess Change in Disease Activity and Adverse Events of Oral Icalcaprant in Adult Participants With Major Depressive DisorderMajor Depressive Disorder
RECRUITING195 Analytics
PHASE2RECRUITING
A Study to Assess Adverse Events and Change in Disease Activity of Oral Icalcaprant in Adult Participants With Bipolar I or II Disorder
Bipolar I DisorderUnlock trial analytics
PHASE2RECRUITING
A Study to Assess Change in Disease Activity and Adverse Events of Oral Icalcaprant in Adult Participants With Major Depressive Disorder
Major Depressive DisorderUnlock trial analytics

Study Endpoints

Primary Endpoints

Change from Baseline to Week 6 in the MADRS (Montgomery-Åsberg Depression Rating Scale) total score
Up to approximately Week 6

MADRS 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 weeks

An 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

Change from Baseline in Montgomery-Åsberg Depression Rating Scale (MADRS) total score.
Up to approximately 6 weeks

Montgomery-Åsberg Depression Rating Scale (MADRS) The MADRS is a 10-item, clinician-rated scale that evaluates the participant's depressive symptomatology during the past week. Participants are to be rated on items assessing feelings of sadness, lassitude, pessimism, inner tension, suicidality, reduced sleep or appetite, difficulty in concentration, and lack of interest. Each item will be scored on a 7-point scale with a score of 0 reflecting no symptoms and a score of 6 reflecting symptoms of maximum severity.

Maximum Observed Plasma Concentration (Cmax) of Icalcaprant
Up to approximately 6 days

Cmax of Icalcaprant

Time to Cmax (Tmax) of Icalcaprant
Up to approximately 6 days

Tmax of Icalcaprant

Terminal Phase Elimination Rate Constant (Beta) of Icalcaprant
Up to approximately 6 days

Beta of Icalcaprant

Terminal Phase Elimination Half-Life (t1/2) of Icalcaprant
Up to approximately 6 days

T1/2 of Icalcaprant

Area under the plasma concentration-time curve from time 0 until the last measurable Concentration (AUCt) of Icalcaprant
Up to approximately 6 days

AUCt of Icalcaprant

Area under the plasma concentration-time curve from time 0 to infinity (AUCinf) of Icalcaprant
Up to approximately 6 days

AUCinf of Icalcaprant

Area under the plasma concentration-time curve (AUC) of Icalcaprant
Up to approximately 14 days

AUC of Icalcaprant

Secondary Endpoints

Change from Baseline to Week 6 in Clinician Global Impression of Severity - Bipolar Disorder (CGI-S-BP) score
Up to approximately Week 6
Change from Baseline in Clinical Global Impression (CGIS)
Up to approximately 6 weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Group 1: Icalcaprant Dose AEXPERIMENTALParticipants will receive oral Icalcaprant dose A once daily for 6 weeks and followed for 4 weeks.
Group 2: Icalcaprant Dose BEXPERIMENTALParticipants will receive oral Icalcaprant dose B once daily for 6 weeks and followed for 4 weeks.
Group 3: Placebo for IcalcaprantPLACEBO_COMPARATORParticipants will receive oral placebo for Icalcaprant daily for 6 weeks and followed for 4 weeks.
Icalcaprant Dose AEXPERIMENTALParticipants will receive oral Icalcaprant dose A once daily for 6 weeks and attend a follow up visit 30 days following end of treatment.
Icalcaprant Dose BEXPERIMENTALParticipants will receive oral Icalcaprant dose B once daily for 6 weeks and attend a follow up visit 30 days following end of treatment.
Placebo for IcalcaprantPLACEBO_COMPARATORParticipants will receive oral placebo once daily for 6 weeks and attend a follow up visit 30 days following end of treatment.
Group 1: Icalcaprant Dose A- Japanese ParticipantsEXPERIMENTALParticipants will receive oral Icalcaprant dose A once, then a 30-day follow-up period.
Group 2: Icalcaprant Dose A- Han Chinese ParticipantsEXPERIMENTALParticipants will receive oral Icalcaprant dose A once, then a 30-day follow-up period.
Icalcaprant with ItraconazoleEXPERIMENTALParticipants will receive oral Icalcaprant with Itraconazole up to 8 days and then followed for 30 days.

Interventions

NameTypeDescription
IcalcaprantDRUGOral Capsules
Placebo for IcalcaprantDRUGOral Capsules
Itraconazole (ITZ)DRUGOral capsule
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Eligibility Criteria

Age Range18 Years to 65 Years
SexALL
Healthy VolunteersNo
Study Sites33

Inclusion Criteria: * Participants with a diagnosis of bipolar I or II according to the DSM-5-TR without psychotic features, confirmed by the MINI 7.0.2, and currently experiencing an MDE beginning at least 4 weeks prior to consent and not exceeding 12 months prior to Screening. * Body Mass Index (...

Countries:United States
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Recent Changes (Last 90 Days)

LOWAug 14, 2026NCT06696755lastUpdatePostDate: changed
LOWAug 14, 2026NCT06696755lastUpdatePostDate: changed
LOWJul 6, 2026NCT06696755lastUpdatePostDate: changed
LOWJul 6, 2026NCT06696755lastUpdatePostDate: changed
LOWJun 16, 2026NCT07276997lastUpdatePostDate: changed
LOWJun 16, 2026NCT07276997lastUpdatePostDate: changed
LOWJun 16, 2026NCT07276997lastUpdatePostDate: changed
LOWJun 16, 2026NCT07276997lastUpdatePostDate: changed

Frequently asked questions about Icalcaprant

What is Icalcaprant used for?

Icalcaprant is an investigational oral small molecule being studied in psychiatry for the treatment of Bipolar I Disorder, Bipolar II Disorder, and Major Depressive Disorder. It is also being evaluated in healthy volunteer studies to assess how the drug moves through the body. It is currently in Phase 2 clinical development.

Who is developing Icalcaprant?

Icalcaprant is being developed by AbbVie Inc., a biopharmaceutical company traded on the New York Stock Exchange under the ticker ABBV. AbbVie is conducting clinical trials of Icalcaprant in the United States for psychiatric conditions including bipolar disorder and major depressive disorder.

What phase is Icalcaprant in?

Icalcaprant is in Phase 2 clinical development for Bipolar I Disorder, Bipolar II Disorder, and Major Depressive Disorder. It has also completed Phase 1 studies in healthy volunteers. The drug is investigational and not yet approved by regulatory authorities.

What clinical trials is Icalcaprant in?

Icalcaprant is being studied in a Phase 2 trial (NCT06696755) enrolling 195 adults with Bipolar I or II Disorder, and a Phase 2 trial (NCT07276997) enrolling 195 adults with Major Depressive Disorder. Both are recruiting in the United States. Completed Phase 1 trials include NCT06722417 and NCT06722430 in healthy volunteers.

Is Icalcaprant being studied in healthy volunteers?

Yes, Icalcaprant has been studied in healthy volunteers in two completed Phase 1 trials. NCT06722417 evaluated a single oral dose in healthy Japanese and Han Chinese adults, and NCT06722430 assessed how Icalcaprant moves through the body when given with itraconazole. Both trials were conducted in the United States.

Is Icalcaprant FDA approved?

Icalcaprant is not FDA approved. It is an investigational drug currently in Phase 2 clinical trials for bipolar disorder and major depressive disorder. The drug has not completed the clinical development process required for regulatory approval.