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The promise of ketamine for treatment-resistant depression: current evidence and future directions

Kaitlin E. DeWilde, Cara F. Levitch, James W. Murrough, Sanjay J. Mathew, Dan V. Iosifescu

Annals of the New York Academy of Sciences February 3, 2015 DOI: 10.1111/nyas.12646 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Review Peer reviewed
Intervention Ketamine
Topics Depression Esketamine Ketamine
Key findings Argues that the glutamate neurotransmitter system, particularly through the NMDA receptor antagonist ketamine, offers a promising alternative to conventional monoamine-targeting antidepressants for major depressive disorder. Clinical trials indicate ketamine acts rapidly and may affect dimensions of psychopathology including anhedonia, cognition, and suicidality, though safety, administration methods, and misuse risks require consideration.

Abstract

Major depressive disorder (MDD) is one of the most disabling diseases worldwide and is becoming a significant public health threat. Current treatments for MDD primarily consist of monoamine‐targeting agents and have limited efficacy. However, the glutamate neurotransmitter system has recently come into focus as a promising alternative for novel antidepressant treatments. We review the current data on the glutamate NMDA receptor antagonist ketamine, which has been shown in clinical trials to act as a rapid antidepressant in MDD. We also examine ketamine efficacy on dimensions of psychopathology, including anhedonia, cognition, and suicidality, consistent with the NIMH Research Domain Criteria initiative. Other aspects of ketamine reviewed in this paper include safety and efficacy, different administration methods, and the risks of misuse of ketamine outside of medical settings. Finally, we conclude with a discussion of glutamatergic agents other than ketamine currently being tested as novel antidepressants.

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