About this trial
This is a randomized, double-blind, placebo-controlled phase 3 clinical trial evaluating the additive effect of intravenous ketamine in combination with electroconvulsive therapy (ECT) in patients with treatment-resistant major depressive disorder (MDD). The study aims to determine whether ketamine enhances the antidepressant efficacy of ECT and reduces associated cognitive side effects. Thirty hospitalized patients diagnosed with treatment-resistant MDD will be randomized to receive either ketamine or placebo (saline) during ECT sessions 2, 4, and 6. Primary outcome is the change in depressive symptoms, measured by the Montgomery-Åsberg Depression Rating Scale (MADRS) at 4 weeks.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Male and female subjects ages 18-70,
diagnosed with MDD (according to SCID5-CV interview)
treatment resistant (defined as at least 2 different antidepressant agents used without success),
ability to give informed consent,
Disqualifiers
Chronic neurological diseases,
Intellectual disability
Contraindications to the electroconvulsive therapy (severe aortic valve stenosis, implantable cardiac defibrillators, uncontrolled hypertension, clinically significant respiratory, renal or hepatic disease, abdominal aortic aneurysm, endocrine disorders, neuromuscular diseases, space occupying brain lesions, stroke in the last 6 months),
Patients with Alcohol Use Disorder or Substance Use Disorder or Substance Abuse history in the past year,
Trial design
Parallel
Treatments tested in this trial
Ketamine Hydrochloride
DrugKetamine will be administered intravenously at a subanesthetic dose of 0.5 mg/kg after a bolus of Propofol, during ECT sessions 2, 4, and 6.
Placebo
DrugPlacebo will be administered intravenously at a subanesthetic dose of 0.5 mg/kg after a bolus of Propofol, during ECT sessions 2, 4, and 6.
Treatment groups
Trial outcomes
Primary outcomes
Mean change in depressive symptoms, as measured by MADRS scale
The primary efficacy endpoint will be assessed using the MADRS score (Montgomery-Åsberg Depression Rating Scale)
Secondary outcomes
Change in Suicidal Ideation (Beck Scale for Suicide Ideation - BSSI)
To assess the effect of ketamine and ECT on suicidal ideation with Beck Scale for Suicide Ideation (BSSI)
Change in Anxiety Symptoms (Hamilton Anxiety Rating Scale - HAM-A)
To evaluate the impact of ketamine and ECT on anxiety symptoms with Hamilton Anxiety Rating Scale (HAM-A)
Change in Cognitive Function (Brief Assessment of Cognition in Affective Disorders - BAC-A)
To determine the cognitive effects of ketamine and ECT with Brief Assessment of Cognition in Affective Disorders (BAC-A)
Change in Dissociative and Psychotic Symptoms (Clinician-Administered Dissociative States Scale - CADSS; Brief Psychiatric Rating Scale - BPRS)
To assess the effects of ketamine and ECT on dissociative and psychotic symptoms with Clinician-Administered Dissociative States Scale (CADSS) and Brief Psychiatric Rating Scale (BPRS)
Sponsors and contacts
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