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Icalcaprant

Phase 2

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

Icalcaprant development status

Highest phase Phase 2
Registered trials 7 across 2 sponsors since Nov 2024

Icalcaprant target and mechanism

ModalitySmall molecule

Also known as ABBV-1354, CVL-354

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials4
Total Enrollment417

FDA Designations

No designations recorded

Icalcaprant clinical trials

Icalcaprant · 4 trials · 5 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.

Number of Participants with Abnormal Change from Baseline in Vital Sign Measurements
Up to approximately 15 days

Number of participants with abnormal change from baseline in vital sign measurements like systolic and diastolic blood pressure will be assessed.

Change From Baseline in Electrocardiograms (ECGs)
Up to approximately 15 days

12-lead resting ECG will be recorded.

Number of Participants with Abnormal Change in Physical Examinations
Up to approximately 15 days

Number of participants with abnormal change in physical examinations in areas like cardiovascular, respiratory, gastrointestinal, and neurological systems will be assessed.

Number of Participants with Abnormal Change in Clinical Laboratory Test Results Like Hematology will be Assessed
Up to approximately 15 days

Number of participants with abnormal change in clinical laboratory test results like hematology will be assessed.

Maximum observed concentration (Cmax) of ABBV-1354
Up to approximately 15 days

Cmax of ABBV-1354 will be assessed.

Time to Cmax (peak time, Tmax) of ABBV-1354
Up to approximately 15 days

Max of ABBV-1354 will be assessed.

Terminal phase elimination half-life (t1/2) of ABBV-1354
Up to approximately 15 days

Terminal phase elimination half-life (t1/2) of ABBV-1354 will be assessed.

Area under the plasma concentration-time curve (AUC) from time 0 to the time of the last measurable concentration (AUCt) of ABBV-1354
Up to approximately 15 days

AUCt of ABBV-1354 will be assessed.

Area under the plasma concentration-time curve (AUC) from time 0 to infinite time (AUCinf) of ABBV-1354
Up to approximately 15 days

AUCinf of ABBV-1354 will be assessed.

Amount of ABBV-1354 excreted in the urine over the sampling period (Aeu)
Up to approximately 15 days

Amount of ABBV-1354 excreted in the urine over the sampling period (Aeu) will be assessed.

Percent of ABBV-1354 excreted in the urine
Up to approximately 15 days

Percent excreted = 100 × (Aeu/dose).

Amount of ABBV-1354 excreted in the feces over the sampling period (Aeu)
Up to approximately 15 days

Amount of ABBV-1354 excreted in the feces over the sampling period (Aeu) will be assessed.

Percent of ABBV-1354 radioactivity excreted in the feces
Up to approximately 15 days

Percent excreted = 100 × (Aeu/dose).

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.
ABBV-1354EXPERIMENTALParticipants will receive a single dose of oral ABBV-1354 and followed 30 days post dose.

Interventions

NameTypeDescription
IcalcaprantDRUGOral Capsules
Placebo for IcalcaprantDRUGOral Capsules
CVL-354DRUGOral solution/capsule
[11C]-LY2795050DRUGIV injection
[11C]-carfentanilDRUGIV injection
ABBV-1354DRUGOral solution
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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

Frequently asked questions about Icalcaprant

What is Icalcaprant?

Icalcaprant is an investigational oral small molecule being developed by AbbVie Inc. for psychiatric conditions. It is in Phase 2 clinical development for Major Depressive Disorder and Bipolar I Disorder. It has not been approved by the FDA and remains under clinical study.

What is Icalcaprant used for?

Icalcaprant is being studied for the treatment of Major Depressive Disorder and Bipolar I Disorder, including Bipolar II Disorder in one trial. It is an investigational therapy and is not approved for any indication. All use is currently limited to participation in clinical research.

Who makes Icalcaprant?

Icalcaprant is being developed by AbbVie Inc., which trades on the New York Stock Exchange under the ticker ABBV. AbbVie is the sponsor of the clinical trials evaluating the drug in Major Depressive Disorder and Bipolar I Disorder.

What phase is Icalcaprant in?

Icalcaprant is in Phase 2 clinical development. Both of its trials are Phase 2 studies that are currently recruiting adult participants. The drug is investigational and has not received FDA approval for any indication.

What clinical trials is Icalcaprant in?

Icalcaprant is being evaluated in two Phase 2 trials. NCT07276997 is a placebo-controlled study in adults with Major Depressive Disorder. NCT06696755 is a placebo-controlled study in adults with Bipolar I or II Disorder. Both are randomized, double-blind, and recruiting in the United States.

How many participants are enrolled in Icalcaprant trials?

The Icalcaprant clinical program has a total planned enrollment of 195 participants across its studies. The Phase 2 trial in Major Depressive Disorder and the Phase 2 trial in Bipolar I or II Disorder each list 195 participants. Both trials enroll adults aged 18 years and older.