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ClinicalTrials.gov public records Last synced Oct 29, 2026, 8:53 AM EDT

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Showing 1–24 of 271 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Refractory Depression Clear all
Terminated Phase 2 Interventional Results available

Efficacy and Safety of MK-1942 When Added to Stable Antidepressant Therapy in Participants With Treatment-Resistant Depression (TRD) (MK-1942-006)

NCT04663321
View directory record Official record
Conditions
Treatment Resistant Depression
Interventions
MK-1942, Placebo
Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years to 65 Years
Enrollment
99 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
45
States / cities
Birmingham, Alabama • Little Rock, Arkansas • Bellflower, California + 40 more
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Oct 29, 2026, 8:53 AM EDT
Withdrawn Phase 2 Interventional Accepts healthy volunteers

Antidepressant Effects of Nitrous Oxide

NCT05357040
View directory record Official record
Conditions
Major Depressive Disorder, Treatment Resistant Depression
Interventions
Nitrous oxide gas for inhalation, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Oct 29, 2026, 8:53 AM EDT
Withdrawn Phase 1 Interventional

Ketamine Biomarker Validation

NCT07307768
View directory record Official record
Conditions
Treatment Resistant Depression (TRD)
Interventions
Ketamine (0.25 mg/kg), Ketamine (0.5 mg/kg), Ketamine (0.75 mg/kg)
Drug
Lead sponsor
Soterix Medical
Industry
Eligibility
18 Years to 59 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 19, 2026 · Synced Oct 29, 2026, 8:53 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Withdrawn Phase 1 Interventional Accepts healthy volunteers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 Jun 1, 2020 · Synced Oct 29, 2026, 8:53 AM EDT
Completed Phase 3 Interventional Results available

A Study of ALKS 5461 for Treatment Refractory Major Depressive Disorder (MDD)

NCT03188185
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
ALKS 5461, ALKS 5461 Placebo
Drug
Lead sponsor
Alkermes, Inc.
Industry
Eligibility
18 Years to 70 Years
Enrollment
278 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
30
States / cities
Tucson, Arizona • Little Rock, Arkansas • Los Alamitos, California + 27 more
Source: ClinicalTrials.gov public record
Updated Apr 8, 2021 · Synced Oct 29, 2026, 8:53 AM EDT
Recruiting Phase 3 Interventional

Lumateperone for Late-Life Depression

NCT07623135
View directory record Official record
Conditions
Treatment Resistant Depression (TRD), Late Life Depression (LLD), Depression / Major Depressive Disorder
Interventions
Lumateperone, Placebo
Drug
Lead sponsor
Eric Lenze
Other
Eligibility
60 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
2
States / cities
Tucson, Arizona • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 16, 2026 · Synced Oct 29, 2026, 8:53 AM EDT
Terminated Phase 2 Interventional

Safety and Efficacy of EVT 101 in Treatment-Resistant Depression

NCT01128452
View directory record Official record
Conditions
Depression
Interventions
EVT 101, Placebo
Drug
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
18 Years to 55 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
14
States / cities
Oceanside, California • San Diego, California • Tampa, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Mar 28, 2016 · Synced Oct 29, 2026, 8:53 AM 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 24, 2023 · Synced Oct 29, 2026, 8:53 AM EDT
Completed Phase 1 Interventional

Vagus Nerve Stimulation for Treating Adults With Severe Fibromyalgia

NCT00294281
View directory record Official record
Conditions
Fibromyalgia
Interventions
Vagus Nerve Stimulation (VNS) Therapy
Device
Lead sponsor
University of Medicine and Dentistry of New Jersey
Other
Eligibility
21 Years to 60 Years
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
1
States / cities
Newark, New Jersey
Source: ClinicalTrials.gov public record
Updated Sep 20, 2011 · Synced Oct 29, 2026, 8:53 AM EDT
Recruiting Not applicable Interventional

A Prospective, Multi-center, Randomized Controlled Blinded Trial Demonstrating the Safety and Effectiveness of VNS Therapy® System as Adjunctive Therapy Versus a No Stimulation Control in Subjects With Treatment-Resistant Depression

NCT03887715
View directory record Official record
Conditions
Treatment Resistant Depression
Interventions
Vagus Nerve Stimulation (VNS)
Device
Lead sponsor
LivaNova
Industry
Eligibility
18 Years and older
Enrollment
6,800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2030
U.S. locations
101
States / cities
Birmingham, Alabama • Huntsville, Alabama • Burlingame, California + 85 more
Source: ClinicalTrials.gov public record
Updated Oct 21, 2026 · Synced Oct 29, 2026, 8:53 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 18, 2006 · Synced Oct 29, 2026, 8:53 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Dopaminergic Effects of Adjunctive Aripiprazole on the Brain in Treatment-Resistant Depression

NCT00953745
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Escitalopram, Aripiprazole, Placebo Capsule, Placebo Tablet
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 55 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 19, 2018 · Synced Oct 29, 2026, 8:53 AM EDT
Withdrawn Phase 2 Interventional

Effect of Lithium Versus Placebo in Adults With Treatment-Resistant Depression Who Are Receiving Ketamine

NCT03290963
View directory record Official record
Conditions
Treatment Resistant Depression
Interventions
Lithium, Placebo, Ketamine
Drug
Lead sponsor
William V. Bobo, M.D.
Other
Eligibility
18 Years to 64 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 16, 2018 · Synced Oct 29, 2026, 8:53 AM EDT
Completed Phase 2 Interventional Results available

Targeting IL-17A for Treatment-Resistant Depression

NCT04979910
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Ixekizumab
Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years to 70 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 20, 2025 · Synced Oct 29, 2026, 8:53 AM EDT
Recruiting Not applicable Interventional

Magnetic Seizure Therapy in Bipolar Depression (MST-BpD) and Treatment Resistant Depression (MST-TRD)

NCT04080778
View directory record Official record
Conditions
Bipolar Disorder
Interventions
magnetic seizure therapy (MST), electroconvulsive therapy (ECT)
Device
Lead sponsor
Joao L. DeQuevedo
Other
Eligibility
22 Years to 85 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 3, 2025 · Synced Oct 29, 2026, 8:53 AM EDT
Completed No phase listed Observational

The Treatment of Children and Adolescents With Treatment-Resistant Depression

NCT00029640
View directory record Official record
Conditions
Bipolar Disorder
Interventions
Not listed
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
Not listed
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2004
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 4, 2008 · Synced Oct 29, 2026, 8:53 AM EDT
Active, not recruiting Not applicable Interventional Results available

Epidural Cortical Stimulation for Depression

NCT00565617
View directory record Official record
Conditions
Treatment Resistant Depression
Interventions
Synergy, Epidural cortical stimulation
Device
Lead sponsor
Medical University of South Carolina
Other
Eligibility
21 Years to 80 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2028
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Oct 29, 2026, 8:53 AM EDT
Completed Not applicable Interventional

Theta Burst Stimulation for Refractory Depression in Autism Spectrum Disorder

NCT06670040
View directory record Official record
Conditions
ASD, Autism Spectrum Disorder, Autism, Depression - Major Depressive Disorder, MDD
Interventions
Transcranial Magnetic Stimulation, Transcranial Magnetic Stimulation Sham
Procedure
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
13 Years to 26 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 23, 2026 · Synced Oct 29, 2026, 8:53 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

Placebo-controlled Trial of 5-hydroxytryptophan and Creatine for SSRI or SNRI Augmentation in Treatment Resistant Depression in Females

NCT02922725
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
5-hydroxytryptophan and Creatine, Placebo control
Drug · Other
Lead sponsor
Brent Michael Kious, MD, PhD
Other
Eligibility
25 Years to 40 Years · Female only
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 31, 2022 · Synced Oct 29, 2026, 8:53 AM EDT
Recruiting Phase 3 Interventional

Psilocybin Intervention for Veterans Overcoming Treatment-Resistant Depression

NCT07226232
View directory record Official record
Conditions
Major Depression
Interventions
Psilocybin
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 75 Years
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2031
U.S. locations
5
States / cities
Birmingham, Alabama • Tuscaloosa, Alabama • Portland, Oregon + 2 more
Source: ClinicalTrials.gov public record
Updated Oct 23, 2026 · Synced Oct 29, 2026, 8:53 AM EDT
Active, not recruiting Phase 2 Interventional

Dasatinib Plus Quercetin for Accelerated Aging in Mental Disorders

NCT05838560
View directory record Official record
Conditions
Schizophrenia, Treatment Resistant Depression, Aging, Premature
Interventions
Dasatinib, quercetin
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
50 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 21, 2026 · Synced Oct 29, 2026, 8:53 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 28, 2022 · Synced Oct 29, 2026, 8:53 AM EDT
Recruiting Phase 2 Interventional

Ketamine Alcohol (in Treatment-Resistant Depression)

NCT02122562
View directory record Official record
Conditions
Magnetic Resonance Imaging, Major Depression, Alcoholism
Interventions
Ketamine
Drug
Lead sponsor
Mark Niciu
Other
Eligibility
18 Years to 55 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2028
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated May 1, 2026 · Synced Oct 29, 2026, 8:53 AM EDT
Completed Phase 2 Interventional Results available

Buprenorphine for Late-Life Treatment Resistant Depression

NCT01071538
View directory record Official record
Conditions
Depression
Interventions
Buprenorphine
Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
50 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 9, 2018 · Synced Oct 29, 2026, 8:53 AM EDT