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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Depressive Disorder, Treatment-Resistant Clear all
Completed Phase 2 Interventional Results available

Double-Blind, Placebo-Controlled Trial of Ketamine Therapy in Treatment-Resistant Depression (TRD)

NCT01920555
View directory record Official record
Conditions
Treatment Resistant Depression
Interventions
Ketamine, Placebo Midazolam
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 70 Years
Enrollment
99 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
6
States / cities
Palo Alto, California • New Haven, Connecticut • Boston, Massachusetts + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 18, 2018 · Synced Jul 22, 2026, 4:50 AM EDT
Recruiting Not applicable Interventional

Deep Brain Stimulation of Treatment-Resistant Bipolar Depression

NCT06599099
View directory record Official record
Conditions
Bipolar Depression
Interventions
Medtronic Percept RC System, One Month Blinded Discontinuation Period
Device · Behavioral
Lead sponsor
Wayne Goodman MD
Other
Eligibility
22 Years to 64 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2030
U.S. locations
4
States / cities
Boston, Massachusetts • Houston, Texas • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 25, 2026 · Synced Jul 22, 2026, 4:50 AM EDT
Recruiting Not applicable Interventional

Closed-Loop Deep Brain Stimulation for Treatment-Resistant Bipolar Depression

NCT07127913
View directory record Official record
Conditions
Bipolar II Disorder, Bipolar II Disorder, Most Recent Episode Major Depressive
Interventions
Device: Stimulation-ON, Device: Stimulation-OFF, Device: Stimulation -ON Active Control
Device
Lead sponsor
Andrew Krystal
Other
Eligibility
22 Years to 70 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2035
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Aug 16, 2025 · Synced Jul 22, 2026, 4:50 AM EDT
Active, not recruiting Not applicable Interventional

Deep Brain Stimulation (DBS) Therapy for Treatment Resistant Depression

NCT02046330
View directory record Official record
Conditions
Major Depressive Disorder, Treatment Resistant Depression
Interventions
Deep Brain Stimulation Model 3387 Model 3389
Device
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
22 Years to 70 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 22, 2026 · Synced Jul 22, 2026, 4:50 AM 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 22, 2026, 4:50 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Behavioral and Electrophysiological Effects of Ketamine in Treatment-Resistant Depression

NCT04239963
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Not listed
Lead sponsor
Mclean Hospital
Other
Eligibility
18 Years to 70 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
1
States / cities
Belmont, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 29, 2024 · Synced Jul 22, 2026, 4:50 AM EDT
Terminated Phase 2 Interventional Results available

The UTHealth Ketamine Project

NCT02882711
View directory record Official record
Conditions
Treatment Resistant Depression, Major Depressive Disorder, Bipolar Disorder
Interventions
Ketamine
Drug
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Nov 23, 2020 · Synced Jul 22, 2026, 4:50 AM EDT
Active, not recruiting Not applicable Interventional

Transcranial Electric Stimulation Therapy (TEST) for Treatment Resistant Depression (TRD)

NCT05172271
View directory record Official record
Conditions
Major Depressive Disorder, Bipolar Disorder, Unipolar Major Depression
Interventions
MagPro TMS Stimulator and coil, Thymatron(R) System IV, Magnetic Resonance Imaging Scanner, ECT device without stimulation
Device · Other
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
25 Years to 64 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 24, 2026 · Synced Jul 22, 2026, 4:50 AM EDT
Completed No phase listed Observational Results available

Treatment-Resistant Depression Registry

NCT00320372
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Not listed
Lead sponsor
Cyberonics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
795 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2015
U.S. locations
55
States / cities
Tucson, Arizona • Beverly Hills, California • Garden Grove, California + 46 more
Source: ClinicalTrials.gov public record
Updated Dec 22, 2015 · Synced Jul 22, 2026, 4:50 AM 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 22, 2026, 4:50 AM EDT
Completed Phase 2 Interventional Results available

A Randomized, Placebo-Controlled, Double-Blind Study to Assess Safety and Efficacy of PCN-101 in TRD

NCT05414422
View directory record Official record
Conditions
Treatment Resistant Depression
Interventions
PCN-101, Placebo
Drug
Lead sponsor
Perception Neuroscience
Industry
Eligibility
18 Years to 65 Years
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
13
States / cities
Little Rock, Arkansas • Garden Grove, California • La Jolla, California + 10 more
Source: ClinicalTrials.gov public record
Updated Jun 3, 2024 · Synced Jul 22, 2026, 4:50 AM EDT
Terminated Phase 4 Interventional

Use of Risperidone in ECT for Treatment Resistant Depression

NCT00203723
View directory record Official record
Conditions
Major Depression
Interventions
Risperidone
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 89 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 17, 2006 · Synced Jul 22, 2026, 4:50 AM 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 22, 2026, 4:50 AM EDT
Active, not recruiting Phase 3 Interventional

Efficacy, Safety, and Tolerability of Two Administrations of COMP360 in Participants With TRD

NCT05711940
View directory record Official record
Conditions
Treatment Resistant Depression
Interventions
Psilocybin
Drug
Lead sponsor
COMPASS Pathways
Industry
Eligibility
18 Years and older
Enrollment
572 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
62
States / cities
Gilbert, Arizona • Bellflower, California • Encino, California + 50 more
Source: ClinicalTrials.gov public record
Updated Jan 11, 2026 · Synced Jul 22, 2026, 4:50 AM EDT
Completed Phase 2 Interventional

FMRI of Patients Receiving IV Ketamine for Treatment Resistant Bipolar Depression

NCT06620042
View directory record Official record
Conditions
Bipolar Depression, Treatment Resistant Bipolar Depression
Interventions
Ketamine, Functional magnetic resonance imaging (fMRI)
Drug · Other
Lead sponsor
Brian Barnett
Other
Eligibility
18 Years to 75 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
2
States / cities
Cleveland, Ohio • Ohio City, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 9, 2025 · Synced Jul 22, 2026, 4:50 AM EDT
Recruiting Not applicable Interventional

Closed-Loop Deep Brain Stimulation for Major Depression

NCT04004169
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Stimulation-ON, Stimulation-OFF, Stimulation-ON Active Control
Device
Lead sponsor
Andrew Krystal
Other
Eligibility
22 Years to 70 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2035
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 30, 2023 · Synced Jul 22, 2026, 4:50 AM EDT
Not listed Not applicable Interventional

Near-Infrared Laser Stimulation for Various Neurological Conditions

NCT04489082
View directory record Official record
Conditions
Refractory Depression, Anxiety Disorders, Neurodegenerative Diseases, Traumatic Brain Injury, Chronic Traumatic Encephalopathy
Interventions
Near Infrared Laser Stimulation
Device
Lead sponsor
Neurological Associates of West Los Angeles
Other
Eligibility
18 Years and older · Female only
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Sep 27, 2022 · Synced Jul 22, 2026, 4:50 AM EDT
Completed Phase 4 Interventional

RCT of Brain Longitudinal Biomarker Study (OPT-Neuro RCT)

NCT05531591
View directory record Official record
Conditions
Depression, Dementia, Mild Cognitive Impairment, Treatment Resistant Depression, Major Depressive Disorder, Treatment-Refractory Depression, Late Life Depression, Geriatric Depression
Interventions
Aripiprazole Augmentation, Bupropion Augmentation, Switch to bupropion, Lithium Augmentation, Switch to nortriptyline
Drug
Lead sponsor
Centre for Addiction and Mental Health
Other
Eligibility
60 Years and older
Enrollment
87 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
3
States / cities
Los Angeles, California • St Louis, Missouri • New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 24, 2024 · Synced Jul 22, 2026, 4:50 AM EDT
Completed Not applicable Interventional

Exercise to Augment TMS in Those With Treatment Resistant Depression

NCT05913401
View directory record Official record
Conditions
Treatment Resistant Depression
Interventions
Aerobic Exercise, Video Watching
Behavioral
Lead sponsor
Butler Hospital
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Jun 2, 2026 · Synced Jul 22, 2026, 4:50 AM EDT
Completed Not applicable Interventional Results available

Augmentation of Treatment-Resistant Depression With An Analog of the Neuroactive Steroid Allopregnanolone

NCT02900092
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Ganaxolone
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
50 Years to 75 Years · Female only
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 17, 2019 · Synced Jul 22, 2026, 4:50 AM EDT
Terminated No phase listed Observational

The RECOVER sUb-study, Which Leverages quaNtitative and Credible Research tOols From Verily, Will providE Assessment measuRes for Depressive Episodes

NCT04753385
View directory record Official record
Conditions
Treatment Resistant Depression
Interventions
Not listed
Lead sponsor
LivaNova
Industry
Eligibility
18 Years and older
Enrollment
138 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
33
States / cities
Birmingham, Alabama • Costa Mesa, California • Los Angeles, California + 29 more
Source: ClinicalTrials.gov public record
Updated Dec 19, 2024 · Synced Jul 22, 2026, 4:50 AM EDT
Completed Not applicable Interventional

The RAFT ECT Study

NCT05402657
View directory record Official record
Conditions
Major Depressive Episode
Interventions
Frontoparietal Ultrabrief Right Unilateral (UBRUL-FP) electroconvulsive therapy, Temporoparietal Ultrabrief Right Unilateral (UBRUL-TP) electroconvulsive therapy
Procedure
Lead sponsor
The George Institute
Other
Eligibility
18 Years and older
Enrollment
156 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
3
States / cities
Atlanta, Georgia • Augusta, Georgia • Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Jul 22, 2026, 4:50 AM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

Intravenous Ketamine Effects on Functional Neuroanatomy

NCT04205890
View directory record Official record
Conditions
Depression
Interventions
Ketamine
Drug
Lead sponsor
Neurological Associates of West Los Angeles
Other
Eligibility
18 Years to 70 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated May 31, 2020 · Synced Jul 22, 2026, 4:50 AM EDT
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 22, 2026, 4:50 AM EDT