Completed

Retrospective Review of Intravenous Ketamine Treatments for Treatment-Resistant Depression

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Study Aim

This observational study reviews the use of intravenous ketamine treatments for treatment-resistant depression in patients, focusing on changes in symptoms measured by the PHQ-9, BDI-II, and GAD-7 assessments.

What is being collected

Data Collection

Collected from past medical records and data - Retrospective
Who is being recruted

Mental Disorders+1

+ Depressive Disorder, Major

+ Depressive Disorder

Over 18 Years
+15 Eligibility Criteria
See all eligibility criteria
How is the trial designed

Ecologic or Community

Assessing exposures and health outcomes at the community level in order to identify population-wide health trends.
Observational
Study Start: April 2022
See protocol details

Summary

Principal SponsorSunnybrook Health Sciences Centre
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Study start date: April 1, 2022

Actual date on which the first participant was enrolled.

This study is focused on understanding how effective intravenous ketamine treatments are for people dealing with treatment-resistant depression. Conducted by the Ontario Ketamine and Infusion Centre, which specializes in providing these treatments, the research involves looking back at patient records to assess the impact of ketamine. Treatment-resistant depression is a condition where typical antidepressant medications do not work, so finding alternative treatments is crucial. By exploring how ketamine works in real-life settings, this study aims to enhance treatment options for those who struggle with depression that doesn't respond to standard therapies. Participants in this study have undergone intravenous ketamine treatments, where ketamine is administered directly into the bloodstream. The study evaluates the effectiveness of these treatments by using several assessments. The Beck's Depression Inventory-II (BDI-II) measures the severity of depression symptoms, with higher scores indicating more severe depression. The Generalized Anxiety Disorder-7 (GAD-7) checks for anxiety symptoms, while the Patient Health Questionnaire-9 (PHQ-9) also assesses depression severity. These tools help researchers understand the impact of ketamine on depression and anxiety, potentially offering insights into new treatment possibilities.

Official TitleRetrospective Chart Review of Patients Undergoing Intravenous Ketamine Treatments for Treatment-resistant Depression
Principal SponsorSunnybrook Health Sciences Centre
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

This section provides details of the study plan, including how the study is designed and what the study is measuring.
Design Details

250 patients to be enrolled

Total number of participants that the clinical trial aims to recruit.

Ecologic or Community

These studies look at groups or populations rather than individuals. They explore community-wide exposures and health outcomes to understand public health trends and risks at a broader scale.

Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria

Any sex

Biological sex of participants that are eligible to enroll.

Over 18 Years

Range of ages for which participants are eligible to join.

Healthy volunteers not allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

Mental DisordersDepressive Disorder, MajorDepressive DisorderMood Disorders

Criteria

5 inclusion criteria required to participate
Age ≥ 18

Able to provide informed consent

Patient diagnosed with treatment-resistant depression

Outpatient recommended and approved by psychiatrist for ketamine treatment

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10 exclusion criteria prevent from participating
History of psychosis/comorbid psychiatric disorders/psychotic depression/dissociative syndromes, significant personality disorder, as clinically assessed by psychiatrist

Using non-prescribed substance (e.g., cannabis) or alcohol use within the preceding 48 hours of treatment

History of substance misuse and/or dependence, including chronic alcohol abuse

Previous ketamine use

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Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Study Objectives

Study Objectives

Primary Objectives

Secondary Objectives

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.

This study has 1 location

Suspended

Ontario Ketamine and Infusion Centre - Toronto Site

Mississauga, CanadaOpen Ontario Ketamine and Infusion Centre - Toronto Site in Google Maps
CompletedOne Study Center