Clinical trials
Major Depressive Disorder clinical trials
Below are recruiting major depressive disorder clinical trials, each written for real people, not researchers. We’re tracking 502 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07740694Recruiting
ECT study for older adults with depression
This study looks at how ECT affects brain activity and inflammation in older adults with depression. It may help researchers understand why ECT works and improve treatment.
Istanbul, BakırköyAges 55 years+ - NCT06626152RecruitingPhase 2
L-DOPA challenge test for depression in older adults
This study tests whether a medication called L-DOPA (used for Parkinson's disease) can help predict how well older adults with depression will respond to treatment. You will take a single dose of L-DOPA and then do simple tasks to measure your mood and thinking.
Vancouver, British ColumbiaAges 60 years+ - NCT05616559Recruiting
Precision-guided treatment for single-episode depression
This study tests a more personalized approach to treating depression in people who have had one episode. It uses questionnaires and brain scans (for some participants) to help decide which treatment approach may work best.
CopenhagenAges 18–65 - NCT05644301RecruitingPhase 3
Blood-marker guided add-on treatment for major depression
This study tests whether doctors can choose the best add-on immune-related treatment for people with major depressive disorder by using inflammation blood tests. It’s meant for people whose depression has not improved enough with their current antidepressant.
Duffel, AntwerpenAges 18–65 - NCT07713849Recruiting
Transition care for recent psychosis
This study tests a program to help people recently diagnosed with psychosis (within the last two years) transition from hospital to community care. If you have a psychotic disorder and a caregiver involved in your discharge planning, this could help you.
Chicago, IllinoisAges 18–40 - NCT07703722RecruitingPhase 3
Psilocybin and therapy for depression with trauma
This trial tests psilocybin (a compound from certain mushrooms) combined with a structured therapy to see if it helps people with depression linked to trauma. It focuses on how the treatment affects the connection between the gut and brain.
Islamabad, CapitalAges 18–60 - NCT07696871RecruitingPhase 1/Phase 2
Cannabidiol oil for treatment-resistant depression
This trial tests if cannabidiol (CBD) oil can help people with major depression that has not improved with standard antidepressants. You will take CBD oil or a placebo while continuing your current antidepressant treatment to see if it improves your symptoms.
Tubarão, Santa CatarinaAges 18–69 - NCT07691749Recruiting
Psychobiotics plus antidepressants for Major Depression
This study tests whether adding psychobiotics (special probiotics for mental health) to your current antidepressant helps treat major depression better than the antidepressant alone. It may be an option if you have moderate to severe depression and are on a stable antidepressant dose.
Lahore, Punjab ProvinceAges 18–60 - NCT07694076Recruiting
Real-time brain feedback for depression
This trial uses a powerful MRI scanner to give you real-time feedback on brain activity linked to depression. You will learn to regulate that activity, which may reduce symptoms.
OxfordAges 18–65 - NCT07682207Recruiting
Accelerated brain stimulation for PTSD and depression
This study tests an accelerated form of brain stimulation called iTBS to see if it can help people with both PTSD and depression. It may be a good option if you have not found enough relief from your current treatments.
London, OntarioAges 18 years+ - NCT07685925Enrolling by invitation
Health study for 2026 medical interns
This study tracks medical interns during their first year using a smartphone app. It aims to understand how internship affects health.
Ann Arbor, MichiganAges 18 years+ - NCT07684911Recruiting
Long-term effects of TMS for depression
This study looks at how well the benefits of transcranial magnetic stimulation (TMS) last over time for people with depression that didn't get better with other treatments. It also uses brain scans to find markers that might predict who will keep doing well.
RennesAges 18 years+ - NCT06658795Recruiting
Can brain stimulation help older adults with depression and loneliness?
This study tests whether a gentle brain stimulation technique called tDCS (transcranial direct current stimulation) can reduce loneliness in older adults with depression. It involves wearing a headband during sessions and comparing results to a placebo group.
Guangzhou, GuangdongAges 60–80 - NCT05961306Recruiting
Testing a stepped screening plan during pregnancy and after birth
This study checks how well a step-by-step screening approach and its tools work for identifying issues during pregnancy (weeks 20–24) or in early postpartum (6–10 weeks after delivery). It may help doctors use more accurate screening to decide who needs further care.
Ghent, Oost-VlaanderenAges 18 years+ - NCT07679204Recruiting
Personality and life satisfaction in bipolar and depression
This study looks at how personality traits and life satisfaction affect people with bipolar II disorder or major depression. You will fill out questionnaires about your feelings and daily life.
ElâzığAges 18 years+ - NCT07680140RecruitingPhase 4
Using biomarkers to choose depression treatment
This study uses a blood test (biomarker) to help pick the antidepressant that might work best for you. It compares two treatments—standard antidepressants and ketamine—in people with major depression who haven't gotten enough relief from one prior treatment.
New York, New YorkAges 18–70 - NCT06675851RecruitingPhase 4
Dopamine changes in the brains of depressed and healthy people
This study uses brain scans to look at dopamine — a chemical messenger related to reward and mood — in people with depression and healthy volunteers. Researchers want to understand how dopamine changes in depression, which may lead to better treatments.
ViennaAges 18–65 - NCT07657234RecruitingPhase 1/Phase 2
Brain stimulation for depression in older adults
This study tests whether a non-invasive brain stimulation technique called transcranial direct current stimulation (tDCS) can help treat depression in people aged 60 and older. tDCS uses a mild electrical current to gently stimulate the brain and may improve mood when added to your current depression treatment.
Dallas, TexasAges 60 years+ - NCT06398496Recruiting
Exercise, gut health, mood in depression
This trial studies whether a 12-week exercise program can improve gut bacteria, mood, and thinking in people with depression. It may help if you are looking for a non-medication way to support your mental health.
Cork, Cork CountyAges 18–59 - NCT05813093Recruiting
Brain stimulation and brain scans for hard-to-treat depression
This trial tests an alternating combination of brain stimulation and brain imaging to see if it helps people with depression that hasn’t improved with usual treatments. The goal is to find a safer, more effective approach for people whose depression has been very difficult to treat.
Toronto, OntarioAges 20–65 - NCT07645157RecruitingPhase 2
Sertraline and Probiotics for Teen Depression
This study tests whether combining an antidepressant medication (sertraline) with special bacteria supplements (probiotics) can help treat depression in teenagers ages 12–18. Researchers believe the probiotics may help the medication work better by improving gut health.
Chongqing, YuzhongAges 12–18 - NCT07642882Recruiting
Brain Stimulation for Fibromyalgia Pain Relief
This study tests whether a non-invasive brain stimulation treatment (rTMS) can reduce chronic pain in fibromyalgia patients. The treatment uses magnetic pulses to stimulate specific areas of the brain and may help relieve widespread pain.
Boulogne-Billancourt, Île-de-France RegionAges 18–80 - NCT07639606Recruiting
Mobile therapy app for mood after recent stroke
This study tests whether using a smartphone or tablet app for cognitive behavioral therapy (a type of talk therapy you do on your device) can help with anxiety and depression in the first month after a stroke. The goal is to see if this convenient, at-home approach improves how you feel during early recovery.
New York, New YorkAges 18–79 - NCT07633080Recruiting
Magnesium supplement added to antidepressants for depression
This study tests whether adding magnesium bisglycinate (a mineral supplement) to your current antidepressant medication can help improve depression symptoms. Researchers want to see if this combination works better than antidepressant alone.
Bhubaneswar, OdishaAges 18–65
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Common questions
- Are there clinical trials for major depressive disorder?
- Yes. Clin2 currently lists 502 recruiting major depressive disorder studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a major depressive disorder trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a major depressive disorder trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.