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NCT07276997PHASE2Recruiting

A Study to Assess Change in Disease Activity and Adverse Events of Oral Icalcaprant in Adult Participants With Major Depressive Disorder

AbbVie

Start Date

12/18/2025

Completion Date

9/1/2027

Summary

Major depressive disorder (MDD; depression) is a mood disorder that causes a continued feeling of sadness and loss of interest. It is a common and serious illness that can cause both emotional and physical symptoms such as feelings of sadness, irritability, not being able to focus on activities, tiredness, changes in eating habits, and aches and pains. This study will assess the changes in disease activity and adverse events of oral Icalcaprant in adult participants with major depressive disorder who are currently experiencing a major depressive episode (MDE). Icalcaprant is an investigational drug being developed for the treatment of depressive episodes in adult participants with major depressive 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 placebo treatment. Around 195 adult participant with major depressive disorder will be enrolled in approximately 35 sites in North America. Participants will receive oral capsules of Icalcaprant or matching placebo once daily for 6 weeks, with a 30-day safety follow-up. 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.

Eligibility Criteria

Age Range: 18 years to 65 years

Inclusion Criteria: * Participants with a diagnosis of major depressive disorder (MDD) according to the Diagnostic and Statistical Manual of Mental Disorders, fifth edition, text revision (DSM-5-TR) without psychotic features, confirmed by the Mini International Neuropsychiatric Interview (MINI) 7.0. * Body Mass Index (BMI) is ≥ 18.0 to ≤ 35.0 kg/m\^2 * Currently experiencing an major depressive episode (MDE) beginning at least 4 weeks prior to consent and not exceeding 6 months prior to Screening * Normal physical examination findings, clinical laboratory test results, vital signs, and 12-lead ECG results at Visit 1 or abnormal results that are judged not clinically significant by the investigator and documented as such in the eCRF. Exclusion Criteria: * Has failed (no more than 25% response on Antidepressant Treatment History Questionnaire (ATRQ)) 3 or more antidepressant treatments during the current depressive episode despite an adequate dose (per ATRQ) and duration (at least 6 weeks). * 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.

Interventions

DRUG

Icalcaprant

DRUG

Placebo for Icalcaprant

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Conditions

Major Depressive Disorder

Locations

Harmonex /ID# 277517

Dothan, Alabama 36303

United States

Ima Clinical Research Phoenix (Alea) /ID# 277516

Phoenix, Arizona 85012

United States

Preferred Research Partners /ID# 279206

Little Rock, Arkansas 72211

United States

Woodland International Research Group /ID# 277605

Little Rock, Arkansas 72211

United States

Advanced Research Center /ID# 277537

Anaheim, California 92805

United States

Sun Valley Research Center /ID# 277513

Imperial, California 92251

United States

Synergy San Diego /ID# 277553

Lemon Grove, California 91945

United States

Accellacare - Long Beach /ID# 279181

Long Beach, California 90807

United States

CenExel CNR /ID# 277533

Sherman Oaks, California 91403

United States

Inland Psychiatric Medical Group /ID# 279275

Temecula, California 92591

United States

Sunwise Clinical Research /ID# 277555

Walnut Creek, California 94596

United States

CenExel Hollywood FL /ID# 278200

Hollywood, Florida 33024

United States

Cns Healthcare - Jacksonville /ID# 277658

Jacksonville, Florida 32256

United States

GMI Florida - Central Miami Medical Institute /ID# 278218

Miami, Florida 33125

United States

Clinical Neuroscience Solutions - Orlando - East South Street /ID# 277558

Orlando, Florida 32801

United States

EquiPath Health & Research Tampa Bay, LLC /ID# 279128

Riverview, Florida 33578

United States

Trialmed /ID# 277601

Atlanta, Georgia 30328

United States

Evergreen Clinical Trials - Norcross /ID# 279421

Norcross, Georgia 30092

United States

Flourish Research - Great Lakes Clinical Trials /ID# 278201

Chicago, Illinois 60640

United States

Amr Conventions Research /ID# 277547

Warrenville, Illinois 60555

United States

Redbird Research /ID# 277485

Las Vegas, Nevada 89119

United States

Ima Clinical Research - Manhattan /ID# 278212

New York, New York 10036

United States

Manhattan Behavioral Medicine /ID# 277910

New York, New York 10036

United States

Quest Therapeutics of Avon /ID# 277550

Avon Lake, Ohio 44012-1004

United States

OSU Psychiatry Department /ID# 277529

Columbus, Ohio 43210-1250

United States

Sooner Clinical Research /ID# 277659

Oklahoma City, Oklahoma 73116

United States

Clinical Neuroscience Solutions /ID# 278192

Memphis, Tennessee 38119

United States

Austin Clinical Trial Partners /ID# 279321

Austin, Texas 78737

United States

Community Clinical Research - Cross Park Drive /ID# 277935

Austin, Texas 78754

United States

Houston Clinical Trials - Bellaire /ID# 277551

Bellaire, Texas 77401

United States

Pillar Clinical Research - Richardson /ID# 276764

Richardson, Texas 75080

United States

Northwest Clinical Research Center /ID# 277484

Bellevue, Washington 98007

United States

Core Clinical Research /ID# 277518

Everett, Washington 98201

United States