Intranasal racemic ketamine maintenance therapy for patients with treatment-resistant depression: a naturalistic feasibility study

Abstract Background Ketamine is a promising therapy for treatment-resistant depression due to its rapid onset, although benefits are often transitory, with patients needing maintenance therapy to prevent relapse. Most data supporting ketamine for treatment-resistant depression refers to the intraven...

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Main Authors: Katelyn Halpape, Raelle Pashovitz, Annabelle Wanson, Monika Hooper, Evyn M. Peters
Format: Article
Language:English
Published: BMC 2025-01-01
Series:BMC Psychiatry
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Online Access:https://doi.org/10.1186/s12888-024-06448-x
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author Katelyn Halpape
Raelle Pashovitz
Annabelle Wanson
Monika Hooper
Evyn M. Peters
author_facet Katelyn Halpape
Raelle Pashovitz
Annabelle Wanson
Monika Hooper
Evyn M. Peters
author_sort Katelyn Halpape
collection DOAJ
description Abstract Background Ketamine is a promising therapy for treatment-resistant depression due to its rapid onset, although benefits are often transitory, with patients needing maintenance therapy to prevent relapse. Most data supporting ketamine for treatment-resistant depression refers to the intravenous route of administration, leaving alternative routes lacking in data, especially as maintenance regimens. Moreover, the safety of ketamine maintenance therapy is poorly defined. This report aims to describe and evaluate a novel hospital-to-outpatient intranasal racemic ketamine maintenance therapy program. Methods This was an observational program evaluation study. Participants were adult inpatients with treatment-resistant depression who had been successfully treated with intranasal racemic ketamine in hospital and were being referred for outpatient maintenance therapy with an intranasal racemic ketamine spray, administered at a specialized community treatment centre. Effectiveness was assessed with the Self-Report Quick Inventory of Depressive Symptomatology, the Quality of Life Scale, and the Clinical Global Impression-Improvement scale. Results Five patients were enrolled, completing up to 14 treatment sessions over 192 days. The mean dose administered throughout treatment was 220 mg (100 to 400 mg). All patients had decreased (or stable) depressive symptoms and increased (or stable) quality of life. There were no serious adverse events or discontinuations due to adverse effects. Reported adverse effects included anxiety and nausea. Slight blood pressure increases were seen during treatment, none of which required intervention. Conclusions Intranasal racemic ketamine maintenance therapy for treatment-resistant depression appeared to be feasible and well tolerated, although effectiveness conclusions cannot be drawn from this small pilot study. Further investigations regarding the safety and effectiveness of intranasal ketamine maintenance therapy are warranted.
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spelling doaj-art-2096158b88d44d80936b867edeaf8f3d2025-01-12T12:34:28ZengBMCBMC Psychiatry1471-244X2025-01-012511510.1186/s12888-024-06448-xIntranasal racemic ketamine maintenance therapy for patients with treatment-resistant depression: a naturalistic feasibility studyKatelyn Halpape0Raelle Pashovitz1Annabelle Wanson2Monika Hooper3Evyn M. Peters4Department of Psychiatry, College of Medicine, University of SaskatchewanCollege of Pharmacy and Nutrition, University of SaskatchewanDepartment of Psychiatry, College of Medicine, University of SaskatchewanDepartment of Psychiatry, College of Medicine, University of SaskatchewanDepartment of Psychiatry, College of Medicine, University of SaskatchewanAbstract Background Ketamine is a promising therapy for treatment-resistant depression due to its rapid onset, although benefits are often transitory, with patients needing maintenance therapy to prevent relapse. Most data supporting ketamine for treatment-resistant depression refers to the intravenous route of administration, leaving alternative routes lacking in data, especially as maintenance regimens. Moreover, the safety of ketamine maintenance therapy is poorly defined. This report aims to describe and evaluate a novel hospital-to-outpatient intranasal racemic ketamine maintenance therapy program. Methods This was an observational program evaluation study. Participants were adult inpatients with treatment-resistant depression who had been successfully treated with intranasal racemic ketamine in hospital and were being referred for outpatient maintenance therapy with an intranasal racemic ketamine spray, administered at a specialized community treatment centre. Effectiveness was assessed with the Self-Report Quick Inventory of Depressive Symptomatology, the Quality of Life Scale, and the Clinical Global Impression-Improvement scale. Results Five patients were enrolled, completing up to 14 treatment sessions over 192 days. The mean dose administered throughout treatment was 220 mg (100 to 400 mg). All patients had decreased (or stable) depressive symptoms and increased (or stable) quality of life. There were no serious adverse events or discontinuations due to adverse effects. Reported adverse effects included anxiety and nausea. Slight blood pressure increases were seen during treatment, none of which required intervention. Conclusions Intranasal racemic ketamine maintenance therapy for treatment-resistant depression appeared to be feasible and well tolerated, although effectiveness conclusions cannot be drawn from this small pilot study. Further investigations regarding the safety and effectiveness of intranasal ketamine maintenance therapy are warranted.https://doi.org/10.1186/s12888-024-06448-xKetamineMajor depressive disorderMood disordersObservational study
spellingShingle Katelyn Halpape
Raelle Pashovitz
Annabelle Wanson
Monika Hooper
Evyn M. Peters
Intranasal racemic ketamine maintenance therapy for patients with treatment-resistant depression: a naturalistic feasibility study
BMC Psychiatry
Ketamine
Major depressive disorder
Mood disorders
Observational study
title Intranasal racemic ketamine maintenance therapy for patients with treatment-resistant depression: a naturalistic feasibility study
title_full Intranasal racemic ketamine maintenance therapy for patients with treatment-resistant depression: a naturalistic feasibility study
title_fullStr Intranasal racemic ketamine maintenance therapy for patients with treatment-resistant depression: a naturalistic feasibility study
title_full_unstemmed Intranasal racemic ketamine maintenance therapy for patients with treatment-resistant depression: a naturalistic feasibility study
title_short Intranasal racemic ketamine maintenance therapy for patients with treatment-resistant depression: a naturalistic feasibility study
title_sort intranasal racemic ketamine maintenance therapy for patients with treatment resistant depression a naturalistic feasibility study
topic Ketamine
Major depressive disorder
Mood disorders
Observational study
url https://doi.org/10.1186/s12888-024-06448-x
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