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Showing 1–24 of 300 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Depressive Disorder, Treatment-resistant Clear all
Completed Phase 4 Interventional Results available

Study Comparing Outcomes for Patients With Treatment Resistant Depression Who Receive VNS Therapy at Different Doses

NCT00305565
View directory record Official record
Conditions
Depression
Interventions
VNS Therapy
Device
Lead sponsor
Cyberonics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
331 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
26
States / cities
Tucson, Arizona • Sacramento, California • Marietta, Georgia + 21 more
Source: ClinicalTrials.gov public record
Updated Jan 6, 2014 · Synced Jul 23, 2026, 8:19 PM EDT
Recruiting Not applicable Interventional

Treatment ResistAnt Depression Subcallosal CingulatE Network DBS (TRANSCEND)

NCT06423430
View directory record Official record
Conditions
Treatment Resistant Depression
Interventions
Sham-stimulation, Active-stimulation
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
22 Years to 70 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
24
States / cities
Birmingham, Alabama • Los Angeles, California • Sacramento, California + 18 more
Source: ClinicalTrials.gov public record
Updated Jun 28, 2026 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Phase 2 Interventional Results available

Ketamine for Depression and Suicide Risk

NCT02094898
View directory record Official record
Conditions
Depression, Suicide
Interventions
Ketamine
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 10, 2017 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Phase 1 Interventional

Continuation Ketamine in Major Depression

NCT00548964
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Lithium, Ketamine
Drug
Lead sponsor
James Murrough
Other
Eligibility
21 Years to 80 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 22, 2014 · Synced Jul 23, 2026, 8:19 PM EDT
Terminated No phase listed Observational Results available

Pharmacogenomics for Antidepressant Guidance and Education

NCT01555021
View directory record Official record
Conditions
Treatment Resistant Depression
Interventions
Genotyping assays
Genetic
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 70 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 4, 2018 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Not applicable Interventional Results available

Mifepristone in Refractory Depression

NCT00186056
View directory record Official record
Conditions
Depression
Interventions
Mifepristone, Placebo Oral Tablet
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 75 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2007
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Apr 4, 2017 · Synced Jul 23, 2026, 8:19 PM EDT
Recruiting Not applicable Interventional

Cortical Inhibition as a Biomarker of Response in a Comparison of Bilateral Versus Unilateral Accelerated Theta Burst Stimulation for Suicidal Ideation in Treatment-Resistant Depression -COMBAT-SI

NCT05377177
View directory record Official record
Conditions
Suicidal Ideation, Treatment-resistant Depression
Interventions
Accelerated Theta Burst Stimulation
Device
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 70 Years
Enrollment
76 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2030
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Nov 4, 2025 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Repeated Ketamine Infusions for Comorbid PTSD and MDD in Veterans

NCT04032301
View directory record Official record
Conditions
Post-Traumatic Stress Disorders, Major Depressive Disorder
Interventions
Ketamine, Normal Saline
Drug · Other
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 75 Years
Enrollment
67 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2024
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 26, 2025 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Phase 2 Interventional Results available

Ziprasidone Augmentation of SSRIs for Patients With Major Depressive Disorder (MDD) That do Not Sufficiently Respond to Treatment With SSRIs

NCT00633399
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Ziprasidone, Placebo
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
458 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
2
States / cities
Birmingham, Alabama • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 2, 2014 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Phase 3 Interventional Results available

A Study to Evaluate the Efficacy, Pharmacokinetics, Safety and Tolerability of Flexible Doses of Intranasal Esketamine Plus an Oral Antidepressant in Adult Participants With Treatment-resistant Depression

NCT03434041
View directory record Official record
Conditions
Depressive Disorder, Treatment-Resistant
Interventions
Esketamine 56 mg, Esketamine 84 mg, Placebo, Duloxetine (Oral Antidepressant), Escitalopram (Oral Antidepressant), Sertraline (Oral Antidepressant), Venlafaxine Extended Release (XR) (Oral Antidepressant)
Drug
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
18 Years to 64 Years
Enrollment
252 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
6
States / cities
Atlanta, Georgia • Shreveport, Louisiana • Gaithersburg, Maryland + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 28, 2025 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Buprenorphine Used With Treatment Resistant Depression in Older Adults

NCT02181231
View directory record Official record
Conditions
Major Depressive Disorder, Depression
Interventions
venlafaxine XR, buprenorphine, Placebo
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
50 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 3, 2019 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Not applicable Interventional Results available

Pilot Accelerated Theta Burst in Treatment-Resistant Bipolar Depression

NCT03953417
View directory record Official record
Conditions
Treatment Resistant Depression
Interventions
Accelerated intermittent theta-burst treatment
Device
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 80 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Feb 3, 2026 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Not applicable Interventional Results available

Intranasal Ketamine in Treatment-Resistant Depression

NCT01304147
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Ketamine, placebo
Drug
Lead sponsor
James Murrough
Other
Eligibility
21 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 7, 2017 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Phase 4 Interventional

Sequenced Treatment Alternatives to Relieve Depression (STAR*D)

NCT00021528
View directory record Official record
Conditions
Depression
Interventions
citalopram, BuproprionSR, buspirone, Lithium, mirtazapine, nortriptyline, sertraline, tranylcypromine, VenlafaxineXR, Cognitive Therapy, T3 (Triiodothyronine)
Drug · Behavioral
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
18 Years to 75 Years
Enrollment
4,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2006
U.S. locations
41
States / cities
Birmingham, Alabama • Tuscaloosa, Alabama • Chula Vista, California + 20 more
Source: ClinicalTrials.gov public record
Updated Sep 24, 2009 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Phase 2 Interventional Results available

Ketamine Plus Lithium in Treatment-Resistant Depression

NCT01880593
View directory record Official record
Conditions
Depression
Interventions
Lithium, Ketamine, Placebo
Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
21 Years to 65 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 30, 2018 · Synced Jul 23, 2026, 8:19 PM EDT
Withdrawn Phase 2 Interventional

Transcranial Magnetic Stimulation for Youth With Treatment-Resistant Major Depressive Disorder

NCT05652465
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Intermittent theta burst repetitive transcranial magnetic stimulation (iTBS)
Device
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
13 Years to 17 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 27, 2026 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Phase 3 Interventional Results available

A Study to Evaluate the Efficacy, Safety, and Tolerability of Flexible Doses of Intranasal Esketamine Plus an Oral Antidepressant in Adult Participants With Treatment-resistant Depression

NCT02418585
View directory record Official record
Conditions
Treatment-resistant Depression
Interventions
Esketamine, Placebo, Duloxetine (Oral Antidepressant), Escitalopram (Oral antidepressant), Sertraline (Oral Antidepressant), Venlafaxine Extended Release (XR) (Oral Antidepressant)
Drug
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
18 Years to 64 Years
Enrollment
236 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
10
States / cities
Birmingham, Alabama • Orange, California • San Rafael, California + 7 more
Source: ClinicalTrials.gov public record
Updated Apr 28, 2025 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Phase 2 Interventional Results available

The Safety and Efficacy of Psilocybin in Participants With Treatment Resistant Depression

NCT03775200
View directory record Official record
Conditions
Treatment Resistant Depression
Interventions
Psilocybin
Drug
Lead sponsor
COMPASS Pathways
Industry
Eligibility
18 Years and older
Enrollment
233 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
8
States / cities
La Jolla, California • San Diego, California • Stanford, California + 5 more
Source: ClinicalTrials.gov public record
Updated Apr 23, 2023 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Phase 1 Interventional Results available

Slow Wave Induction by Propofol to Eliminate Depression (SWIPED) I

NCT04680910
View directory record Official record
Conditions
Treatment-resistant Depression
Interventions
Propofol, Electroencephalography (EEG), Slow-Wave Activity
Drug · Diagnostic Test
Lead sponsor
Washington University School of Medicine
Other
Eligibility
60 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 22, 2026 · Synced Jul 23, 2026, 8:19 PM EDT
Recruiting Not applicable Interventional

RESISTance Exercise for Depression Trial

NCT06110897
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
High Dose Resistance Exercise Training, Low Dose Resistance Exercise Training Group
Behavioral
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 65 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
2
States / cities
Ames, Iowa • Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Phase 4 Interventional Results available

A Study of Infliximab for Treatment Resistant Major Depression

NCT00463580
View directory record Official record
Conditions
Depression
Interventions
Infliximab, Placebo
Drug
Lead sponsor
Emory University
Other
Eligibility
25 Years to 60 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jul 7, 2025 · Synced Jul 23, 2026, 8:19 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Long-term Observation of Participants With Mood Disorders

NCT04877977
View directory record Official record
Conditions
Depression, Suicide Risk
Interventions
Not listed
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
18 Years to 99 Years
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2028
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 27, 2025 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Phase 3 Interventional Results available

Open-Label Safety Study of AXS-05 in Subjects With Depression

NCT04039022
View directory record Official record
Conditions
Major Depressive Disorder, Treatment Resistant Depression, Depression
Interventions
AXS-05 (dextromethorphan and bupropion) oral tablets
Drug
Lead sponsor
Axsome Therapeutics, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
876 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
51
States / cities
Phoenix, Arizona • Little Rock, Arkansas • Bellflower, California + 46 more
Source: ClinicalTrials.gov public record
Updated Oct 11, 2022 · Synced Jul 23, 2026, 8:19 PM EDT
Completed Phase 2 Interventional

An Investigation of the Antidepressant Efficacy of the 5-HT2A Antagonist, M100907, in Combination With Citalopram in Treatment Resistant Depression

NCT00070694
View directory record Official record
Conditions
Depressive Disorder
Interventions
MDL100.907
Drug
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
Not listed
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2004
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Jul 23, 2026, 8:19 PM EDT