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DepressionJune 2023Summary reviewed June 2026

A Ketamine Infusion Improved Depression in Over Half of Treatment-Resistant Patients

Researchers compared ketamine infusions to electroconvulsive therapy in 403 people with depression that hadn't responded to other treatments. More patients improved with ketamine (55%) than with ECT (41%), and ketamine didn't cause the memory problems seen with ECT.

What the trial was testing

The ELEKT-D enrolled 403 patients with depression. The study was sponsored by Bo Hu and tracked outcomes across the full group of patients who matched the trial's eligibility profile.

It was mid-stage testing (phase 2/3). Trials at this stage are designed to produce evidence regulators and physicians can act on — not just observations to follow up later.

What the results showed

55% of patients receiving ketamine had major improvement in their depression symptoms.

The New England journal of medicine · 2023 · NCT03113968

These findings — that over half of patients with hard-to-treat depression saw major symptom reduction with ketamine — were published in the The New England journal of medicine and represent the headline result of the study.

Researchers tracked outcomes across 403 patients enrolled in the trial. The result was consistent enough across the group that the team felt confident reporting it.

What this means for patients

For patients with depression, this result changes the calculus on what to ask their care team about. Whether it changes day-to-day care depends on factors like disease subtype, prior treatments, and where the patient is in their care journey.

What you can do now

Ketamine is FDA-approved for treatment-resistant depression as a nasal spray (Spravato) and is also used off-label as an infusion. If your depression hasn't improved with standard medications, talk to your doctor about whether ketamine treatment might be right for you. This treatment requires medical supervision and monitoring.

Eligibility for the treatments mentioned above depends on specific test results and clinical history. Bring this summary, the trial name, and your most recent labs or pathology report to your next visit.

Open depression trials

RecruitingLarge-scale testing

Allopurinol in Depression

Major depressive disorder (MDD) is one of the most common psychiatric disorders with serious socioeconomic consequences on daily life and health care costs. Despite the advent of newer antidepressants that target monoamine pathways, nearly 50% of patients have no response to first-line antidepressant therapy. Thus, a combination of medications with different strategies at the beginning of treatment could provide further therapeutic benefits to MDD patients.

Tanta, Egypt
RecruitingInterventional study

Lifestyle Interventions to Prevent Cognitive Deficits in Subjects With Depressive Symptoms: From Mechanisms to Clinical Practice

The goal of this clinical study is to investigate if lifestyle changes can help prevent cognitive decline and reduce depressive symptoms in people between the ages of 50 and 80 with depressive symptoms or a diagnosis of major depression, but without signs of cognitive decline. The main questions it aims to answer are: * Does regular physical activity improve mood and memory in people who are depressed or have depressive symptoms? * Does cognitive training help prevent mental difficulties in people at risk of cognitive decline? * Do changes in diet and lifestyle alter the composition of the gut microbiota and immuno-related infiammatory factors? Researchers will compare three different treatment groups to see which intervention is most effective in improving mental and cognitive health. The participants: * Will take part to online sessions on healthy eating based on the Mediterranean diet * Some will do regular exercise, supervised by a personal trainer * Others will do weekly cognitive training in small groups at the hospital * They will provide blood and fecal samples and complete cognitive tests and clinical questionnaires at the beginning, at the end of the treatment (12 weeks), and after 3 months.

Brescia, Italy