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Major Depression clinical trials
Every US clinical trial registered for Major Depression — phase mix, recruiting status, and the sponsors running them, straight from the NIH ClinicalTrials.gov registry.
29 US clinical trials · 7 currently recruiting
The research picture
Major Depression has 29 registered US clinical trials, 7 of them open to new participants right now — about 24% of the total.
- 7
- recruiting participants now
- 24%
- of trials open to enrollment
- 9
- in Phase 3–4 (later-stage)
- 5
- top sponsor: National Institute of Mental Health (NIMH)
Counts reflect the public ClinicalTrials.gov registry as last mirrored by PlainTrial. Status and phase are reported by each study's sponsor. This is reference information, not medical advice.
Active & Recent Trials
NIMH Rhythms and Blues Study: A Prospective Natural History Study of Motor Activity, Mood States, and Bipolar Disorder
National Institute of Mental Health (NIMH)
NCT05669703
University of Iowa Interventional Psychiatry Service Patient Registry
Mark Niciu
NCT04480918
Characterizing Cognitive Decline in Late Life Depression: The ADNI Depression Project
University of Southern California
NCT02434393
Leucine in Midlife Depression
Emory University
NCT06580145
Mechanism of Action Underlying Ketamine's Antidepressant Effects: The AMPA Throughput Theory in Patients With Treatment-Resistant Major Depression
National Institute of Mental Health (NIMH)
NCT03973268
Ketamine Alcohol (in Treatment-Resistant Depression)
Mark Niciu
NCT02122562
Accelerated High-Dose tDCS for Depression
Medical University of South Carolina
NCT07226011
Person-Centered Versus Measurement-Based Care in Mental Health
University of Pittsburgh
NCT02507349
Implementation of Harmonized Depression Outcome Measures in a Primary Care Registry and a Mental Health Registry
OM1
NCT04235725
Duke Conte Center for the Neuroscience of Depression in Late Life
Duke University
NCT00576875
Prozac Treatment of Major Depression: Discontinuation Study
New York State Psychiatric Institute
NCT00427128
Preventing Depression Recurrence in Diabetes
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NCT00374426
The Effectiveness of FMPO in Improving the Quality of Care for Persons With Severe Mental Illness.
US Department of Veterans Affairs
NCT00466323
Triiodothyronine (T3) Supplementation in the Treatment of Bipolar and Unipolar Depression.
Hadassah Medical Organization
NCT00158990
Motivational Interviews for Depression in Primary Care
Denver Health and Hospital Authority
NCT01114334
Increasing Use of Mental Health Services
Weill Medical College of Cornell University
NCT00605358
Serum Markers as a Bioassay for Unipolar Depression
Steward St. Elizabeth's Medical Center of Boston
NCT00825799
Thyroid Medication and Antidepressants for Treating Major Depression
Emory University
NCT00208702
Provigil in Conjunction With SSRIs for the Treatment of Mild or Moderate Depression With Attendant Symptoms of Sleepiness and Fatigue.
Emory University
NCT00208715
The BIO-K Study: A Single-Arm, Open-Label, Biomarker Development Clinical Trial of Ketamine for Non-Psychotic Unipolar Major Depression and Bipolar I or II Depression.
Mayo Clinic
NCT03156504
Lexapro and Pramipexole and to Treat Major Depression
National Institute of Mental Health (NIMH)
NCT00086307
Self Focus in Bipolar Disorder: A Functional Magnetic Resonance Imaging (fMRI) Study
Massachusetts General Hospital
NCT02253225
Proactive Psychiatry Consultation for Patients With Cancer and Severe Mental Illness
Massachusetts General Hospital
NCT02594696
Pharmacotherapy in Depression With Panic Spectrum
University of Pittsburgh
NCT00177996
The Brain on Whole Body Hyperthermia: A Neuroimaging Study
University of Arizona
NCT02062840
Antidepressant Effects of the Glycine Receptor Antagonist AV-101 (4-chlorokynurenine) in Major Depressive Disorder
National Institute of Mental Health (NIMH)
NCT02484456
Study of Brain Response to Emotional Pictures Using a Magnetic Resonance Imaging (fMRI) While on Escitalopram
Indiana University School of Medicine
NCT00707863
Escitalopram Treatment of Major Depression in Patients With Temporal Lobe Epilepsy
Conrad, Erich J., M.D.
NCT00595699
Antidepressant Effects of NR2B in Major Depression
National Institute of Mental Health (NIMH)
NCT00472576
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 2 |
| Phase 2 | 4 |
| Phase 3 | 1 |
| Phase 4 | 8 |
Top Sponsors
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Reading the Major Depression Trial Landscape
ClinicalTrials.gov lists 29 US studies indexed under Major Depression, and 7 of those are currently open to recruitment — roughly 24% of the total volume on the registry. That ratio is a useful proxy for activity level: a high share of recruiting studies often signals that research interest is current and that new enrollment opportunities are appearing, while a low share typically means the field is dominated by completed or follow-up work where most participant spots have already been filled. These counts reflect the public registry only and include studies at every stage of design, so they should be read as an index of research attention rather than as a measure of treatment availability.
The phase distribution for Major Depression shows 9 late-stage studies (Phase 3 and Phase 4 combined) alongside 6 earlier-phase entries (Phase 1 through Phase 2). Phase 1 and Phase 2 studies focus on early safety signals, dosing, and preliminary effect, while Phase 3 studies are typically the larger efficacy and safety trials submitted toward regulatory review, and Phase 4 studies follow approved interventions in real-world use. A condition weighted toward later phases often reflects a mature research pipeline with several interventions already close to or past approval, whereas a heavier early-phase tilt suggests the field is still exploring new mechanisms and candidate approaches.
Top sponsor activity for Major Depression is led by National Institute of Mental Health (NIMH) with 5 indexed trials, alongside 9 other organizations in the top contributor list. The list on this page surfaces up to 29 of the most relevant recent and active entries, ordered with recruiting studies first so practical options are visible. All figures are derived from the public ClinicalTrials.gov dataset maintained by the National Library of Medicine and are reproduced here for reference. Inclusion of a trial, sponsor, or intervention on this page is neither an endorsement nor a recommendation — eligibility, protocol changes, and site-level status can shift frequently, so always verify current details on ClinicalTrials.gov and consult a qualified healthcare provider before acting on anything you see here.
Frequently Asked Questions
How many clinical trials are there for Major Depression?
PlainTrial tracks 29 US clinical trials for Major Depression, of which 7 are currently recruiting participants. Data sourced from ClinicalTrials.gov.
How do I find a recruiting trial for Major Depression?
Use the trial list above filtered by "Recruiting" status, or visit our trial finder at /recruiting to search by condition and state. Always discuss trial participation with your healthcare provider before enrolling.
Is this data current?
Data is sourced from ClinicalTrials.gov and reflects our most recent data pull. Trial status may have changed since then. Always verify current information at ClinicalTrials.gov before making decisions about participation.
Related
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from ClinicalTrials.gov (National Library of Medicine). Consult a qualified professional before making decisions based on this data.
Read our methodology — how this data is sourced, computed, and verified.
Source: ClinicalTrials.gov (NIH/NLM) ClinicalTrials.gov AACT registry · 2026 Trial counts and statuses sourced from ClinicalTrials.gov. Sponsor counts include both industry and federal/academic sponsors.