Major Depression Clinical Trials

32 recruitingLast updated: June 18, 2026

There are 32 actively recruiting major depression clinical trials across 11 countries. Studies span Not Applicable, Phase 2, Phase 1, Phase 4, Early Phase 1. Top locations include Iowa City, Iowa, United States, Toronto, Ontario, Canada, Bethesda, Maryland, United States. Updated daily from ClinicalTrials.gov.


Major Depression Trials at a Glance

32 actively recruiting trials for major depression are listed on ClinicalTrialsFinder across 6 cities in 11 countries. The largest study group is Not Applicable with 17 trials, with the heaviest enrollment activity in Iowa City, Toronto, and Bethesda. Lead sponsors running major depression studies include Mark Niciu, Medical University of South Carolina, and National Institute of Mental Health (NIMH).

Browse major depression trials by phase

Treatments under study

About Major Depression Clinical Trials

Looking for clinical trials for Major Depression? There are currently 32 studies actively recruiting participants. Clinical trials offer access to new treatments before they are widely available, and every approved therapy in use today was first tested through a clinical trial.

Below you can browse trials, sign up for alerts when new Major Depression trials open, and view eligibility criteria for each study. Each listing includes the study phase, locations, and enrollment details.

Frequently Asked Questions

Common questions about Major Depression clinical trials

A clinical trial is a carefully designed research study that tests new medical treatments, drugs, devices, or approaches in human volunteers. Every approved medication and treatment available today was proven safe and effective through clinical trials.

All clinical trials are reviewed and approved by Institutional Review Boards (IRBs) — independent committees that evaluate patient safety. Trials follow strict protocols, and your health is monitored closely throughout. You can withdraw at any time.

Not necessarily. Many trials compare the new treatment against the current standard of care, meaning all participants receive active treatment. When placebos are used, they are typically combined with standard treatment, not given alone. The trial description will always specify the design.

Under the Affordable Care Act, most private insurers are required to cover routine patient care costs during a clinical trial. The sponsor typically covers the investigational treatment itself. Medicare also covers routine costs for qualifying trials.

Yes. Participation is completely voluntary. You can withdraw at any time, for any reason, without it affecting your access to standard medical care.

Each trial has specific eligibility criteria — including age, diagnosis, disease stage, prior treatments, and general health. Browse the trials listed above and check their eligibility sections. You can also contact the trial site directly to discuss your situation.

Showing 120 of 32 trials

Recruiting
Phase 1

Mechanism of Action Underlying Ketamine's Antidepressant Effects: The AMPA Throughput Theory in Patients With Treatment-Resistant Major Depression

DepressionMajor Depressive DisorderMajor Depression
National Institute of Mental Health (NIMH)70 enrolled1 locationNCT03973268
Recruiting
Phase 1

Study of the Safety, Tolerability, Electrophysiological Effects and Efficacy of DMT in Humans

DepressionMajor Depression Disorder
Deepak C. D'Souza60 enrolled1 locationNCT06671977
Recruiting
Not Applicable

Sleep TMS for Depression

SleepMajor Depression
Stanford University15 enrolled1 locationNCT06824415
Recruiting
Phase 2

Inhaled DMT for Major Depressive Disorder

SuicideSuicidal IdeationMajor Depression+2 more
Universidade Federal do Rio Grande do Norte140 enrolled5 locationsNCT07562191
Recruiting
Not Applicable

Accelerated High-Dose tDCS for Depression

Major DepressionMajor Depression Disorders
Medical University of South Carolina20 enrolled1 locationNCT07226011
Recruiting
Not Applicable

Modular Intervention for Depression Study

Major Depression
Pontificia Universidad Catolica de Chile150 enrolled5 locationsNCT07380451
Recruiting
Early Phase 1

Synaptic Mechanisms of Continuous Theta Burst Stimulation in Depression

Major Depression
Mclean Hospital80 enrolled1 locationNCT07560878
Recruiting

An Examination of the Performance of QbMobile in Differential Diagnosis Associated With ADHD Symptoms

Social Anxiety DisorderAutism Spectrum Disorder (ASD)Major Depression Disorders+3 more
Qbtech AB300 enrolled1 locationNCT07329673
Recruiting
Phase 4

Establishing Mobile Transcranial Magnetic Stimulation

Treatment Resistant Major Depression
Medical University of South Carolina30 enrolled1 locationNCT06748209
Recruiting

NIMH Rhythms and Blues Study: A Prospective Natural History Study of Motor Activity, Mood States, and Bipolar Disorder

MigraineMajor DepressionBipolar Disorder
National Institute of Mental Health (NIMH)1,260 enrolled1 locationNCT05669703
Recruiting
Phase 2

Ketamine Alcohol (in Treatment-Resistant Depression)

Magnetic Resonance ImagingAlcoholismMajor Depression
Mark Niciu60 enrolled1 locationNCT02122562
Recruiting
Not Applicable

Home tDCS for the Treatment of Major Depression.

Major Depression Disorder
Ionclinics & Deionic SL198 enrolled3 locationsNCT07510880
Recruiting
Phase 4

Establishing Multimodal Brain Biomarkers for Treatment Selection in Depression

Major Depressive DisorderChronic Major Depression, Recurrent
University of Texas at Austin50 enrolled1 locationNCT05892744
Recruiting
Not Applicable

Transcranial Photobiomodulation (tPBM) for Somatic Symptoms in Treatment-Resistant Depression

Treatment Resistant Depression (TRD)Major Depression Disorder
Taipei Veterans General Hospital, Taiwan40 enrolled1 locationNCT07543328
Recruiting

University of Iowa Interventional Psychiatry Service Patient Registry

Major Depressive DisorderMajor DepressionObsessive-Compulsive Disorder+4 more
Mark Niciu1,000 enrolled1 locationNCT04480918
Recruiting

Study of Sleep Inertia in Major Depressive Disorder by the Psychomotor Vigilance Task

Major DepressionSleep Inertia
Centre Hospitalier Universitaire de Nīmes110 enrolled1 locationNCT06732284
Recruiting

Characterizing Cognitive Decline in Late Life Depression: The ADNI Depression Project

Major DepressionLate Life Depression (LLD)
University of Southern California120 enrolled2 locationsNCT02434393
Recruiting
Not Applicable

Validation of a Composite Medical Device Using a Blood Biomarker-based Algorithm and MDQ for the Diagnosis of Bipolar Disorder

Primary CareMajor DepressionBipolar Disorder (BD)+1 more
University Hospital, Montpellier623 enrolled1 locationNCT07031817
Recruiting
Not Applicable

Effect of Aerobic Exercise on Biomarkers in Depression

Major Depression
Kutahya Health Sciences University40 enrolled1 locationNCT07062783
Recruiting

Pharmacogenomics of Selective Serotonin Reuptake Inhibitor (SSRI)-Induced Behavioural Activation

Behavioral ActivationMajor Depressive DisorderAnxiety Disorders+3 more
University of Manitoba160 enrolled2 locationsNCT06763081