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Ketamine as a rapid antidepressant: the debate and implications

  • Roger C. M. Ho and Melvyn W. Zhang
  • Please note an addendum has been issued for this article.
Summary

Ketamine, a synthetic derivative of phencyclidine, is a commonly misused party drug that is restricted in high-income countries because of its addictive potential. Ketamine is also used as an anaesthetic in human and veterinary medicine. In the 1990s, research using ketamine to study the pathophysiology of schizophrenia was terminated owing to ethical concerns. Recently, controversy surrounding the drug has returned, as researchers have demonstrated that intravenous ketamine infusion has a rapid antidepressant effect and have therefore proposed ketamine as a novel antidepressant. This article debates the question of ketamine as an antidepressant, considering the drug's addictive potential, ethical concerns about prescribing a hallucinogen, the evidence base and motives behind ketamine trials.

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Copyright
Corresponding author
Dr Roger C. M. Ho, National University of Singapore, Department of Psychological Medicine, Level 9 NUHS Tower Block, 1E Kent Ridge Road, Singapore, Singapore 119228. Email: roger_ho@nuhs.edu.sg
Footnotes
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LEARNING OBJECTIVES

• Understand the pharmacological properties of ketamine as an anaesthetic, a drug of misuse and a proposed antidepressant

• Review the current evidence for ketamine in treating depressive disorder and recognise potential risks associated with long-term use

• Recognise the arguments for and against the use of ketamine as a novel antidepressant

DECLARATION OF INTEREST

None

Footnotes
References
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Ketamine as a rapid antidepressant: the debate and implications

  • Roger C. M. Ho and Melvyn W. Zhang
  • Please note an addendum has been issued for this article.
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