Trial reportThe American journal of psychiatry2018
Ketamine for Rapid Reduction of Suicidal Thoughts in Major Depression: A Midazolam-Controlled Randomized Clinical Trial.
Trial report in The American journal of psychiatry, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 187 papers, 20 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
A Single Ketamine Infusion Combined With Music for Suicidal Ideation During a Depressive Episode: A Randomized Open Label Clinical Trial
Nebulized Ketamine for the Treatment of Major Depressive Disorder in an Inpatient Setting: A Midazolam-controlled Randomized Controlled Trial
Who cites it
187 citing papers in PubMed, 20 syntheses or guidelines pooled it, 412 citations in OpenAlex.
- Cognitive effects of intravenous Ketamine in treatment-resistant depression: A systematic review.Psychological medicine · 2026Pooled it
- Efficacy of racemic ketamine or esketamine monotherapy for reducing suicidal ideation in uni- or bipolar depression: a systematic review and meta-analysis.European archives of psychiatry and clinical neuroscience · 2025Pooled it
- Clinical trials since 2020 of rapid anti-suicidal ideation effects of ketamine and its enantiomers: a systematic review.Translational psychiatry · 2025Pooled it
- Effects of psychoplastogens on blood levels of brain-derived neurotrophic factor (BDNF) in humans: a systematic review and meta-analysis.Molecular psychiatry · 2025Pooled it
- Comparative safety and tolerability of ketamine and esketamine for major depressive disorder: a systematic review and meta-analysis.Frontiers in pharmacology · 2025Pooled it
- A meta-analysis of the effects of ketamine on suicidal ideation in depression patients.Translational psychiatry · 2024Pooled it
- Efficacy and safety of ketamine-assisted electroconvulsive therapy in major depressive episode: a systematic review and network meta-analysis.Molecular psychiatry · 2024Pooled it
- A scientometric analysis of research on the role of NMDA receptor in the treatment of depression.Frontiers in pharmacology · 2024Pooled it
- International pooled patient-level meta-analysis of ketamine infusion for depression: In search of clinical moderators.Molecular psychiatry · 2022Pooled it
- Blood-based biomarkers of antidepressant response to ketamine and esketamine: A systematic review and meta-analysis.Molecular psychiatry · 2022Pooled it
- Efficacy and safety of racemic ketamine and esketamine for depression: a systematic review and meta-analysis.Expert opinion on drug safety · 2022Pooled it
- Ketamine and other glutamate receptor modulators for depression in adults with unipolar major depressive disorder.The Cochrane database of systematic reviews · 2021Pooled it
- Ventromedial prefrontal cortex/anterior cingulate cortex Glx, glutamate, and GABA levels in medication-free major depressive disorder.Translational psychiatry · 2021Pooled it
- Ketamine for Bipolar Depression: A Systematic Review.The international journal of neuropsychopharmacology · 2021Pooled it
- Improving Suicide Prevention Through Evidence-Based Strategies: A Systematic Review.The American journal of psychiatry · 2021Pooled it
- The Canadian Network for Mood and Anxiety Treatments (CANMAT) Task Force Recommendations for the Use of Racemic Ketamine in Adults with Major Depressive Disorder: Recommandations Du Groupe De Travail Du Réseau Canadien Pour Les Traitements De L'humeur Et De L'anxiété (Canmat) Concernant L'utilisation De La Kétamine Racémique Chez Les Adultes Souffrant De Trouble Dépressif Majeur.Canadian journal of psychiatry. Revue canadienne de psychiatrie · 2021Pooled it
- Classic serotonergic psychedelics for mood and depressive symptoms: a meta-analysis of mood disorder patients and healthy participants.Psychopharmacology · 2021Pooled it
- Meta-Analysis: Hemodynamic Responses to Sub-anesthetic Doses of Ketamine in Patients With Psychiatric Disorders.Frontiers in psychiatry · 2021Pooled it
- Effectiveness and Safety of Ketamine for Unipolar Depression: a Systematic Review.The Psychiatric quarterly · 2020Pooled it
- Efficacy of single and repeated administration of ketamine in unipolar and bipolar depression: a meta-analysis of randomized clinical trials.Pharmacological reports : PR · 2020Pooled it
127 more citing papers are in PubMed but not listed here.
Corrections and comments
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Authors and funding
12 authors at 1 institution in 1 country.
Funding
Abstract
objectivePharmacotherapy to rapidly relieve suicidal ideation in depression may reduce suicide risk. Rapid reduction in suicidal thoughts after ketamine treatment has mostly been studied in patients with low levels of suicidal ideation. The authors tested the acute effect of adjunctive subanesthetic intravenous ketamine on clinically significant suicidal ideation in patients with major depressive disorder.
methodIn a randomized clinical trial, adults (N=80) with current major depressive disorder and a score ≥4 on the Scale for Suicidal Ideation (SSI), of whom 54% (N=43) were taking antidepressant medication, were randomly assigned to receive ketamine or midazolam infusion. The primary outcome measure was SSI score 24 hours after infusion (at day 1).
resultsThe reduction in SSI score at day 1 was 4.96 points greater for the ketamine group compared with the midazolam group (95% CI=2.33, 7.59; Cohen's d=0.75). The proportion of responders (defined as having a reduction ≥50% in SSI score) at day 1 was 55% for the ketamine group and 30% for the midazolam group (odds ratio=2.85, 95% CI=1.14, 7.15; number needed to treat=4.0). Improvement in the Profile of Mood States depression subscale was greater at day 1 for the ketamine group compared with the midazolam group (estimate=7.65, 95% CI=1.36, 13.94), and this effect mediated 33.6% of ketamine's effect on SSI score. Side effects were short-lived, and clinical improvement was maintained for up to 6 weeks with additional optimized standard pharmacotherapy in an uncontrolled follow-up.
conclusionsAdjunctive ketamine demonstrated a greater reduction in clinically significant suicidal ideation in depressed patients within 24 hours compared with midazolam, partially independently of antidepressant effect.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.