Abstract
Intranasal esketamine (Spravato™), the S-enantiomer of ketamine, targets the glutamatergic system via non-competitive antagonism of the N-methyl-D-aspartate receptor, thereby providing a novel approach to traditional antidepressants that target modulation of the monoaminergic system. In conjunction with an oral antidepressant (OAD), intranasal esketamine is approved in the USA for use in adult patients with treatment-resistant depression (TRD). Given its novel mechanism and rapid onset of action, convenient weekly or once every 2 weeks maintenance regimen, and the current paucity of approved pharmacotherapy options for TRD, esketamine nasal spray in conjunction with an OAD provides an important treatment option for this difficult-to-treat high-risk patient population. In pivotal clinical trials in adult patients with TRD, flexible-dose intranasal esketamine in conjunction with a newly initiated OAD provided rapid and sustained improvements in depression symptoms, and had a manageable tolerability and safety profile. Further long-term clinical experience is required to fully define the potential benefits and risks of esketamine therapy in combination with an OAD in TRD.
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Acknowledgements
The manuscript was reviewed by: S. Kasper, Department of General Psychiatry and Psychotherapy, Medical University of Vienna, Vienna, Austria; A. Winkour. Department of Psychiatry, University of Connecticut School of Medicine, Farmington, CT, USA. During the peer review process, Janssen Pharmaceuticals Inc., the marketing-authorization holder of esketamine, was offered an opportunity to provide a scientific accuracy review of their data. Changes resulting from comments received were made on the basis of scientific and editorial merit.
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Lesley Scott is an employee of Adis International Ltd./Springer Nature, is responsible for the article content and declares no conflicts of interest.
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Enhanced material for this Adis Drug Q&A can be found at https://doi.org/10.6084/m9.figshare.9866693.
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Scott, L.J. Intranasal esketamine in treatment-resistant depression: a profile of its use. Drugs Ther Perspect 35, 536–545 (2019). https://doi.org/10.1007/s40267-019-00675-z
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DOI: https://doi.org/10.1007/s40267-019-00675-z