Clinical trial Recruiting at 33 sites Phase 2 Interventional Ages 18 to 65

Oral icalcaprant for adults with major depressive disorder

Official title: A Phase 2, Multicenter, 6-Week, Double Blind, Placebo-Controlled Study to Evaluate the Efficacy and Safety of Icalcaprant in Subjects With Major Depressive Disorder

Run by AbbVie · NCT07276997 · Data updated 2026-11-12

This trial tests whether oral icalcaprant can reduce depressive symptoms and be tolerated by adults currently experiencing a major depressive episode.

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years to 65 Years
SexAll
Enrollment195 (estimated)
SponsorAbbVie
Industry-sponsored
Locations33 sites (Dothan, Alabama and 32 other locations)
StatusRecruiting
StartedDecember 18, 2025
Main results expectedSeptember 2027
Study endsSeptember 2027
Registry record updatedJune 15, 2026
Trial IDNCT07276997 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults with DSM-5-TR major depressive disorder who are currently in a major depressive episode (4 weeks to 6 months), have a BMI between 18 and 35 kg/m2, and meet the study's medical and ECG/lab criteria are the intended participants.

Probably not a fit

People with psychotic features, those who have failed three or more adequate antidepressant treatments during the current episode (treatment-resistant), or those with significant medical contraindications are unlikely to benefit from this trial.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This randomized Phase 2 interventional trial will enroll about 195 adults with major depressive disorder and assign them to one of three treatment arms, with roughly a one-in-three chance of receiving placebo. Eligibility requires a DSM-5-TR diagnosis of MDD confirmed by the MINI and a current major depressive episode that began between 4 weeks and 6 months prior to screening. The study measures changes in disease activity and records adverse events while participants take oral icalcaprant or placebo across multiple clinic visits at approximately 35 sites in North America. Safety monitoring includes physical exams, laboratory tests, vital signs, and 12-lead ECGs documented at screening and during the study.

Why it matters

Potential benefit: If successful, icalcaprant could provide a new oral treatment option that reduces depressive symptoms with an acceptable safety profile.

How similar studies have gone: Some early-stage trials of kappa-opioid receptor antagonists and other novel mechanisms have shown promise, but icalcaprant's effectiveness for depression has not yet been proven in controlled studies.

Who can join: the full rules

Show full inclusion / exclusion criteria
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.

Where it's running

  • Harmonex /ID# 277517
    Dothan, Alabama, United States
    Recruiting
  • Ima Clinical Research Phoenix (Alea) /ID# 277516
    Phoenix, Arizona, United States
    Recruiting
  • Preferred Research Partners /ID# 279206
    Little Rock, Arkansas, United States
    Recruiting
  • Woodland International Research Group /ID# 277605
    Little Rock, Arkansas, United States
    Recruiting
  • Advanced Research Center /ID# 277537
    Anaheim, California, United States
    Recruiting
  • Sun Valley Research Center /ID# 277513
    Imperial, California, United States
    Recruiting
Show 27 more locations
  • Synergy San Diego /ID# 277553
    Lemon Grove, California, United States
    Recruiting
  • Accellacare - Long Beach /ID# 279181
    Long Beach, California, United States
    Recruiting
  • CenExel CNR /ID# 277533
    Sherman Oaks, California, United States
    Recruiting
  • Inland Psychiatric Medical Group /ID# 279275
    Temecula, California, United States
    Recruiting
  • Sunwise Clinical Research /ID# 277555
    Walnut Creek, California, United States
    Recruiting
  • CenExel Hollywood FL /ID# 278200
    Hollywood, Florida, United States
    Recruiting
  • Cns Healthcare - Jacksonville /ID# 277658
    Jacksonville, Florida, United States
    Recruiting
  • GMI Florida - Central Miami Medical Institute /ID# 278218
    Miami, Florida, United States
    Recruiting
  • Clinical Neuroscience Solutions - Orlando - East South Street /ID# 277558
    Orlando, Florida, United States
    Recruiting
  • EquiPath Health & Research Tampa Bay, LLC /ID# 279128
    Riverview, Florida, United States
    Recruiting
  • Trialmed /ID# 277601
    Atlanta, Georgia, United States
    Recruiting
  • Evergreen Clinical Trials - Norcross /ID# 279421
    Norcross, Georgia, United States
    Recruiting
  • Flourish Research - Great Lakes Clinical Trials /ID# 278201
    Chicago, Illinois, United States
    Recruiting
  • Amr Conventions Research /ID# 277547
    Warrenville, Illinois, United States
    Recruiting
  • Redbird Research /ID# 277485
    Las Vegas, Nevada, United States
    Recruiting
  • Ima Clinical Research - Manhattan /ID# 278212
    New York, New York, United States
    Recruiting
  • Manhattan Behavioral Medicine /ID# 277910
    New York, New York, United States
    Recruiting
  • Quest Therapeutics of Avon /ID# 277550
    Avon Lake, Ohio, United States
    Recruiting
  • OSU Psychiatry Department /ID# 277529
    Columbus, Ohio, United States
    Recruiting
  • Sooner Clinical Research /ID# 277659
    Oklahoma City, Oklahoma, United States
    Recruiting
  • Clinical Neuroscience Solutions /ID# 278192
    Memphis, Tennessee, United States
    Recruiting
  • Austin Clinical Trial Partners /ID# 279321
    Austin, Texas, United States
    Recruiting
  • Community Clinical Research - Cross Park Drive /ID# 277935
    Austin, Texas, United States
    Recruiting
  • Houston Clinical Trials - Bellaire /ID# 277551
    Bellaire, Texas, United States
    Recruiting
  • Pillar Clinical Research - Richardson /ID# 276764
    Richardson, Texas, United States
    Recruiting
  • Northwest Clinical Research Center /ID# 277484
    Bellevue, Washington, United States
    Recruiting
  • Core Clinical Research /ID# 277518
    Everett, Washington, United States
    Recruiting

Study contacts

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Other studies for the same condition or treatment. Recruiting studies are listed first.

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.