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RecruitingMajor Depressive Disorder

Study of ABX-002 for the Adjunctive Treatment of Major Depressive Disorder (AMPLIFY)

Eligible age

18–65 yrs

Accepts

All genders

Locations

19 states

Healthy volunteers

No

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About this study

The goal of this clinical trial is to learn if ABX-002 added to an existing antidepressant treatment will benefit depression symptoms in adults with moderate to severe major depressive disorder who have had an inadequate response to their antidepressant. This is a double-blind, placebo-controlled, 2-arm, parallel-group, Phase 2 study, randomized 1:1 (ABX-002: placebo). The study will include the following stages: 1. Screening, approximately 35 days 2. 42-day Treatment Period 3. 2-week post dose Safety Follow-up Period 4. 6-month postdose targeted safety follow-up period

Sponsor: Autobahn Therapeutics, Inc.

You may qualify if…

  • Meets the DSM-5 criteria for Major Depressive Disorder, with a current major depressive episode duration of \> 6 weeks and ≤ 18 months.
  • A score of ≤ 22 (midrange mild/moderate) on the Hamilton Anxiety Rating Scale.
  • Montgomery-Asberg Depression Rating Scale total score of \> 24 \[indicating moderate to severe depression\] at Screening and at Baseline.
  • Subject is compliantly using a single selective serotonin reuptake inhibitors / serotonin norepinephrine reuptake inhibitor antidepressant for at least 6 weeks for their current episode of depression, with an adequate dose, and with an inadequate response as defined by the Antidepressant Treatment Response Questionnaire. The dosage of the current antidepressant must have been stable for the past 4 weeks, and the dosage and specific antidepressant used should remain the same from Screening through the end of the Follow-up Period.

You may not qualify if…

  • Note: History implies lifetime history, unless otherwise specified
  • History of schizophrenia or other psychotic disorder, major depressive disorder with psychotic features or concomitant DSM-5 depressive disorders, bipolar I or II disorder, cyclothymic disorder, delirium, dementia, amnestic disorder, or cognitive disorder.
  • Current diagnosis or active symptoms within the last 2 years of obsessive-compulsive disorder, posttraumatic stress disorder, panic disorder, or eating disorder, according to DSM-5 criteria.
  • Primary diagnosis of borderline, antisocial, paranoid, schizoid, schizotypal, or histrionic personality disorder, according to DSM-5 criteria. Current or history within the last 2 years of self-injurious behavior is exclusionary.
  • Has failed more than 2 single selective serotonin reuptake inhibitors / serotonin norepinephrine reuptake inhibitor antidepressant treatments, including the current serotonin reuptake inhibitors / serotonin norepinephrine reuptake inhibitor, during the current depressive episode, despite an adequate dose (per Antidepressant Treatment Response Questionnaire) and duration (at least 6 weeks).
  • Failure to respond to triiodothyronine or thyroxine augmentation for the treatment of depression.
  • Started new psychotherapy or had a change in the intensity of psychotherapy within 8 weeks before Screening.
  • Is suicidal at Screening or Baseline

Where it's recruiting

Alabama

Birmingham

Arizona

Chandler · Phoenix · Tucson

California

Anaheim · Encino · Glendale · Long Beach

Connecticut

Cromwell

Florida

Brandon · Hialeah · Jacksonville · Lake City

Georgia

Atlanta · Decatur · Peachtree Corners · Savannah

Massachusetts

Boston · Watertown

Missouri

Saint Charles

Nevada

Las Vegas

New York

Brooklyn · New York · Staten Island

Source: ClinicalTrials.gov · NCT06633016 · last updated 2026-01-20