Treatment Resistant Depression Clinical Trials

77 recruitingLast updated: June 18, 2026

There are 77 actively recruiting treatment resistant depression clinical trials across 21 countries. Studies span Not Applicable, Phase 2, Phase 4, Phase 3, Phase 1, Early Phase 1. Top locations include Toronto, Ontario, Canada, New York, New York, United States, San Diego, California, United States. Updated daily from ClinicalTrials.gov.


Treatment Resistant Depression Trials at a Glance

77 actively recruiting trials for treatment resistant depression are listed on ClinicalTrialsFinder across 6 cities in 21 countries. The largest study group is Not Applicable with 38 trials, with the heaviest enrollment activity in Toronto, New York, and San Diego. Lead sponsors running treatment resistant depression studies include University of California, San Diego, Centre for Addiction and Mental Health, and Unity Health Toronto.

Browse treatment resistant depression trials by phase

Treatments under study

About Treatment Resistant Depression Clinical Trials

Looking for clinical trials for Treatment Resistant Depression? There are currently 66 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 Treatment Resistant 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 Treatment Resistant 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 77 trials

Recruiting
Not Applicable

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

Treatment Resistant Depression
LivaNova6,800 enrolled101 locationsNCT03887715
Recruiting
Not Applicable

DBS for TRD With the Medtronic Percept PC

Major Depressive DisorderTreatment Resistant Depression
Helen Mayberg, MD10 enrolled1 locationNCT05773755
Recruiting
Not Applicable

Treatment ResistAnt Depression Subcallosal CingulatE Network DBS (TRANSCEND)

Treatment Resistant Depression
Abbott Medical Devices100 enrolled24 locationsNCT06423430
Recruiting
Phase 1

DBS for Depression

Treatment Resistant Depression
Northwell Health20 enrolled1 locationNCT06096207
Recruiting
Phase 2

Imaging the Effects of Serotonin 2A Receptor Modulation on Synaptic Density in Treatment-resistant Depression (SYNVEST)

Treatment Resistant Depression
Centre for Addiction and Mental Health12 enrolled1 locationNCT06512220
Recruiting
Phase 4

Comparative Effectiveness Study of Two Forms of Ketamine for Treatment-resistant Depression

Treatment Resistant Depression
The George Institute162 enrolled7 locationsNCT06278779
Recruiting
Phase 2

An Open-Label Study to Evaluate the Safety, Tolerability and Pharmacodynamics of BPL-003 in Patients With Treatment Resistant Depression

Treatment Resistant Depression
Beckley Psytech Limited64 enrolled3 locationsNCT05660642
Recruiting
Not Applicable

Accelerated iTBS for Major Depression

Major Depressive Disorder (MDD)Treatment Resistant Depression (TRD)
Istanbul University - Cerrahpasa35 enrolled1 locationNCT07603804
Recruiting
Not Applicable

A Comparison of Two Psychotherapy Programs in Persistently Depressed Treatment-Resistant Inpatients

Treatment Resistant DepressionPersistent Depressive Disorder
University of Greifswald396 enrolled8 locationsNCT04996433
Recruiting
Phase 2

A Study to Assess the Efficacy, Safety and Tolerability of VLS-01 Buccal Film, Compared to Placebo in Patients With Treatment Resistant Depression (ELUMINA)

Treatment Resistant Depression
atai Therapeutics, Inc.142 enrolled48 locationsNCT06524830
Recruiting
Phase 3

Ketamine Augmentation of ECT in Treatment-Resistant Depression

Major Depressive DisorderTreatment Resistant Depression
Università Vita-Salute San Raffaele30 enrolled1 locationNCT07088380
Recruiting
Phase 2

Mindfulness Engaged Neurostimulation for Depression (MEND II)

DepressionDepressive DisorderDepressive Symptoms+2 more
University of California, San Diego120 enrolled1 locationNCT07512284
Recruiting
Not Applicable

Coaching as an Adjunct to Ketamine Therapy for Treatment-Resistant Depression

Treatment Resistant Depression (TRD)
Massachusetts General Hospital20 enrolled2 locationsNCT07563868
Recruiting

Natural History of Depression, Bipolar Disorder and Suicide Risk

Molecular Mechanisms of Pharmacological ActionDepressive SymptomsSuicide+18 more
National Institute of Mental Health (NIMH)500 enrolled1 locationNCT06462196
Recruiting
Phase 4

Algorithm Guided Treatment Versus Treatment as Usual (TAU) for Patients With Treatment Resistant Depression

Treatment Resistant Depression (TRD)
Aalborg University Hospital80 enrolled1 locationNCT07080723
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
Phase 2

ALTO-207 in Adults With Treatment-resistant Depression (TRD)

Treatment Resistant Depression (TRD)
Alto Neuroscience178 enrolled48 locationsNCT07553637
Recruiting
Not Applicable

Maintenance rTMS for Depression (Maitr-De)

Major Depressive DisorderTreatment Resistant Depression
University of California, San Diego75 enrolled3 locationsNCT06938841
Recruiting
Not Applicable

Stereotactic Radiotherapy Treatment for Treatment-resistant Depression

Depressive DisorderTreatment Resistant Depression
Capital Medical University9 enrolled1 locationNCT07274917
Recruiting
Early Phase 1

Personalized DBS Targeting for Treating Depression

Treatment Resistant Depression (TRD)
Second Affiliated Hospital, School of Medicine, Zhejiang University5 enrolled1 locationNCT06784388