Depressive disorder, treatment-resistant

This trial tests whether a single day of accelerated transcranial magnetic stimulation (TMS) can reduce depressive symptoms in adults with treatment-resistant depression. Participants are randomly assigned to receive one of two active TMS protocols—targeting the precuneus or the …

This study tests whether esketamine nasal spray, used by itself, can reduce depression symptoms in adults whose depression has not improved with at least two prior antidepressant treatments. Participants are randomly assigned to receive either a low dose (56 mg), a high dose (84 …

Researchers are testing whether adding the experimental drug OSU6162 to an SSRI or SNRI antidepressant helps adults whose depression has not improved with those drugs alone. The trial enrolls 180 people aged 25 to 75 who meet criteria for major depressive disorder and have not re…

This study tests a new medicine called ACP-211 in adults with major depression who haven't gotten better with standard antidepressants. About 153 people will receive either the drug or a placebo for 28 days. The main goal is to see if ACP-211 reduces depression symptoms more than…

This study tests whether a new drug called HNK can quickly improve symptoms in people with major depression that hasn't responded to other treatments. About 50 adults aged 18 to 70 will receive four infusions of HNK and four of a placebo over several weeks, with their depression …

This study tests whether adding a supportive text-messaging program (Text4Support) to repetitive transcranial magnetic stimulation (rTMS) improves depression symptoms more than rTMS alone. About 200 adults with treatment-resistant depression will be randomly assigned to one of tw…

This study tests whether giving multiple sessions of magnetic brain stimulation each day works better than the usual one-session-per-day approach for treating depression in people aged 60 and older. About 280 participants will receive active treatment, with some getting the accel…

This study tests whether a newer 'deep' magnetic stimulation helmet works better than the standard coil for people with depression that hasn't improved with medication. 152 adults will receive 20 sessions over 4 weeks and be followed for 90 days. The goal is to see which method r…

This study looks at how nitrous oxide (laughing gas) changes brain connections in people with hard-to-treat depression compared to healthy volunteers. About 50 participants will get either the gas or a placebo and have their brains scanned with MRI. The goal is to understand how …

This study tests how a single dose of intravenous ketamine changes brain chemicals like GABA and glutamate in people with treatment-resistant depression. Thirty adults will receive either ketamine or a placebo, and researchers will measure brain activity and depression symptoms. …