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Showing 1–24 of 291 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Antidepressant + Placebo Clear all
Completed Phase 2 Interventional Results available

Exploratory Study of SPD489 in Adults With Major Depressive Disorder (MDD) as Augmentation Therapy to an Antidepressant

NCT00905424
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Antidepressant + SPD489 (lisdexamfetamine dimesylate), Antidepressant + placebo
Drug
Lead sponsor
Shire
Industry
Eligibility
18 Years to 55 Years
Enrollment
246 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
15
States / cities
Newport Beach, California • San Diego, California • Bradenton, Florida + 12 more
Source: ClinicalTrials.gov public record
Updated Jun 13, 2021 · Synced Sep 22, 2026, 6:12 AM EDT
Terminated Not applicable Interventional Results available

Oxytocin Add-on for Stable Depressed Patients

NCT01211756
View directory record Official record
Conditions
Major Depressive Disorder, Dysthymia Disorder
Interventions
Oxytocin, Placebo
Drug
Lead sponsor
David Feifel
Other
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Sep 24, 2019 · Synced Sep 22, 2026, 6:12 AM EDT
Terminated Phase 2 Interventional Results available

Antidepressant Effects of TS-161 in Treatment-Resistant Depression

NCT04821271
View directory record Official record
Conditions
Major Depressive Disorder, Treatment-Resistant Depression, Depression
Interventions
Placebo, TS-161
Other · Drug
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
18 Years to 65 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 9, 2025 · Synced Sep 22, 2026, 6:12 AM EDT
Completed Phase 2 Interventional Results available

A Study of CLE-100 (Oral Esketamine) as an Adjunctive Treatment to Standard Antidepressants for Major Depressive Disorder

NCT06340958
View directory record Official record
Conditions
Adjunctive Treatment of Major Depressive Disorder (MDD)
Interventions
CLE-100, Placebo
Drug
Lead sponsor
Clexio Biosciences Ltd.
Industry
Eligibility
18 Years to 65 Years
Enrollment
99 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
23
States / cities
La Jolla, California • Lafayette, California • Upland, California + 20 more
Source: ClinicalTrials.gov public record
Updated Jun 22, 2026 · Synced Sep 22, 2026, 6:12 AM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety Study of SPD489 in Combination With an Antidepressant in the Treatment of Adults With Major Depressive Disorder

NCT01436162
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Antidepressant + SPD489 (Lisdexamfetamine dimesylate ), Antidepressant + Placebo
Drug
Lead sponsor
Shire
Industry
Eligibility
18 Years to 65 Years
Enrollment
1,105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
36
States / cities
Scottsdale, Arizona • Little Rock, Arkansas • Costa Mesa, California + 31 more
Source: ClinicalTrials.gov public record
Updated Jun 8, 2021 · Synced Sep 22, 2026, 6:12 AM EDT
Completed Phase 2 Interventional Results available

Omega-3 for Depression and Other Cardiac Risk Factors - 2

NCT02021669
View directory record Official record
Conditions
Depression
Interventions
Omega-3 supplement, Placebo
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
25 Years and older
Enrollment
144 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 3, 2019 · Synced Sep 22, 2026, 6:12 AM EDT
Completed Phase 3 Interventional Results available

COVID-OUT: Early Outpatient Treatment for SARS-CoV-2 Infection (COVID-19)

NCT04510194
View directory record Official record
Conditions
Covid19, SARS-CoV Infection
Interventions
Metformin, Placebo, Fluvoxamine, Ivermectin
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
30 Years to 85 Years
Enrollment
1,323 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
7
States / cities
Sylmar, California • Aurora, Colorado • Golden, Colorado + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 23, 2026 · Synced Sep 22, 2026, 6:12 AM EDT
Completed Phase 4 Interventional

Thyroid Medication and Antidepressants for Treating Major Depression

NCT00208702
View directory record Official record
Conditions
Major Depression
Interventions
Triiodothyronine, Placebo, Sertraline
Drug · Other
Lead sponsor
Emory University
Other
Eligibility
18 Years to 60 Years
Enrollment
153 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 2003
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Nov 16, 2015 · Synced Sep 22, 2026, 6:12 AM EDT
Completed Phase 2Phase 3 Interventional

Supraphysiological Doses of Levothyroxine as Adjunctive Therapy in Bipolar Depression

NCT01528839
View directory record Official record
Conditions
Bipolar Disorder
Interventions
L-Thyroxine, Placebo
Drug
Lead sponsor
Charite University, Berlin, Germany
Other
Eligibility
18 Years to 65 Years
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 7, 2012 · Synced Sep 22, 2026, 6:12 AM EDT
Withdrawn Phase 2 Interventional

A Study To Assess Adverse Events and Change in Disease Activity With Oral Cariprazine When Added to Antidepressant Therapies (ADTs) Compared to Placebo in Adult Participants With Generalized Anxiety Disorder (GAD) Who Have Had an Inadequate Response to ADTs Alone

NCT04965272
View directory record Official record
Conditions
Generalized Anxiety Disorder
Interventions
Cariprazine 0.75 mg/day, Cariprazine 1.5 mg/day, Cariprazine 3.0 mg/day, Placebo
Drug · Other
Lead sponsor
AbbVie
Industry
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
36
States / cities
Little Rock, Arkansas • Colton, California • Costa Mesa, California + 29 more
Source: ClinicalTrials.gov public record
Updated Apr 11, 2022 · Synced Sep 22, 2026, 6:12 AM EDT
Completed Phase 2 Interventional Results available

Clinical Study to Test a New Drug to Treat Major Depression

NCT00976560
View directory record Official record
Conditions
Depressive Disorder, Major
Interventions
GW856553, Placebo
Drug · Other
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 60 Years
Enrollment
128 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
4
States / cities
Hoffman Estates, Illinois • Park Ridge, Illinois • New York, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Nov 13, 2017 · Synced Sep 22, 2026, 6:12 AM EDT
Terminated Phase 4 Interventional

The Efficacy and Safety of Escitalopram for Depression in Multiple Sclerosis

NCT00151294
View directory record Official record
Conditions
Depression, Multiple Sclerosis
Interventions
escitalopram oxalate antidepressant
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
1
States / cities
White Plains, New York
Source: ClinicalTrials.gov public record
Updated Sep 13, 2006 · Synced Sep 22, 2026, 6:12 AM EDT
Completed Phase 2 Interventional Results available

Antidepressant Effects of the Glycine Receptor Antagonist AV-101 (4-chlorokynurenine) in Major Depressive Disorder

NCT02484456
View directory record Official record
Conditions
Major Depression
Interventions
AV 101 (4-Chlorokynurenine), Placebo Comparator
Drug · Other
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
18 Years to 65 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 10, 2022 · Synced Sep 22, 2026, 6:12 AM 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 Sep 22, 2026, 6:12 AM EDT
Completed Phase 2 Interventional

An Eight-Week Study Evaluating the Efficacy and Tolerability of Two Doses of SSR149415 in Outpatients With Major Depressive Disorder

NCT00358631
View directory record Official record
Conditions
Depressive Disorder
Interventions
SSR149415
Drug
Lead sponsor
Sanofi
Industry
Eligibility
18 Years to 64 Years
Enrollment
319 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
1
States / cities
Bridgewater, New Jersey
Source: ClinicalTrials.gov public record
Updated Apr 12, 2009 · Synced Sep 22, 2026, 6:12 AM EDT
Completed Phase 2 Interventional

A Study of SLS-002 (Intranasal Racemic Ketamine) in Adults With Major Depressive Disorder at Imminent Risk of Suicide

NCT04669665
View directory record Official record
Conditions
Depressive Disorder, Major, Suicidal
Interventions
SLS-002, Placebo, Standard of care, Intranasal device
Drug · Other · Device
Lead sponsor
Seelos Therapeutics, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
164 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
21
States / cities
Orange, California • Panorama City, California • San Diego, California + 18 more
Source: ClinicalTrials.gov public record
Updated Sep 27, 2023 · Synced Sep 22, 2026, 6:12 AM EDT
Completed Phase 3 Interventional Results available

Brexpiprazole as Adjunctive Treatment in Patients With Major Depressive Disorder With an Inadequate Response to Antidepressant Treatment

NCT01838681
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Placebo, Brexpiprazole, ADT
Drug
Lead sponsor
H. Lundbeck A/S
Industry
Eligibility
18 Years to 75 Years
Enrollment
1,986 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
8
States / cities
Little Rock, Arkansas • Cerritos, California • Temecula, California + 4 more
Source: ClinicalTrials.gov public record
Updated Aug 8, 2017 · Synced Sep 22, 2026, 6:12 AM EDT
Terminated Phase 2 Interventional Results available

Clinical Trial of Estrogen for Postpartum Depression

NCT00059228
View directory record Official record
Conditions
Postpartum Depression, Depression
Interventions
17beta Estradiol, Placebos
Drug
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
20 Years to 45 Years · Female only
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2016
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 12, 2018 · Synced Sep 22, 2026, 6:12 AM EDT
Withdrawn Phase 2 Interventional

N2O for Acute Suicidality and Depression in the ED

NCT05710887
View directory record Official record
Conditions
Suicidal Ideation, Major Depressive Disorder, Treatment Resistant Depression
Interventions
Nitrous oxide gas for inhalation, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 3, 2026 · Synced Sep 22, 2026, 6:12 AM EDT
Completed Phase 2 Interventional Results available

BTRX-246040 Administered Once Daily to Patients With Major Depressive Disorder

NCT03193398
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
BTRX-246040 oral capsule(s), Placebo oral capsule(s)
Drug
Lead sponsor
BlackThorn Therapeutics, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
104 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
8
States / cities
Cerritos, California • Garden Grove, California • Jacksonville, Florida + 5 more
Source: ClinicalTrials.gov public record
Updated May 10, 2021 · Synced Sep 22, 2026, 6:12 AM EDT
Terminated Phase 1 Interventional

A Study of Seltorexant as Adjunctive Therapy to Antidepressants in Adolescents With Major Depressive Disorder Who Have an Inadequate Response to Selective Serotonin Reuptake Inhibitor (SSRI) and Psychotherapy

NCT04951609
View directory record Official record
Conditions
Depressive Disorder, Major
Interventions
Seltorexant, Placebo
Drug
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
12 Years to 17 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
12
States / cities
Phoenix, Arizona • Anaheim, California • San Diego, California + 9 more
Source: ClinicalTrials.gov public record
Updated Apr 26, 2025 · Synced Sep 22, 2026, 6:12 AM EDT
Completed Not applicable Interventional Results available

Levetiracetam in the Management of Bipolar Depression

NCT00566150
View directory record Official record
Conditions
Bipolar Depression
Interventions
Levetiracetam, Placebo
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 65 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 30, 2020 · Synced Sep 22, 2026, 6:12 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

SSRI and Buprenorphine

NCT00475878
View directory record Official record
Conditions
Opiate Dependence, Depression
Interventions
escitalopram, placebo
Drug
Lead sponsor
Butler Hospital
Other
Eligibility
18 Years to 75 Years
Enrollment
147 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2009
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Apr 2, 2012 · Synced Sep 22, 2026, 6:12 AM EDT
Completed Phase 2 Interventional Results available

CAP-Ketamine for Antidepressant Resistant PTSD

NCT02655692
View directory record Official record
Conditions
PTSD, Posttraumatic Stress Disorder
Interventions
Ketamine, Placebo/Saline
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 70 Years
Enrollment
163 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
3
States / cities
West Haven, Connecticut • Minneapolis, Minnesota • San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jun 1, 2022 · Synced Sep 22, 2026, 6:12 AM EDT