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Ketamine--can chronic use impair memory?

K L Jansen1

  • 1Department of Anatomy, University of Auckland School of Medicine, New Zealand.

The International Journal of the Addictions
|February 1, 1990
PubMed
Summary
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Long-term, high-dose ketamine use may cause lasting cognitive and visual impairments. This case study examines potential consequences of chronic ketamine (a PCP congener) abuse in humans.

Area of Science:

  • Neuroscience
  • Psychopharmacology
  • Clinical Neurology

Background:

  • Ketamine, a phencyclidine (PCP) congener, has psychological effects leading to nonmedical use.
  • Acute ketamine administration may impair memory, while chronic high-dose use affects synaptic plasticity in animal models.
  • The consequences of chronic ketamine use in humans warrant investigation.

Purpose of the Study:

  • To examine the potential long-term effects of chronic, high-dose ketamine use in humans.
  • To present a case study detailing cognitive and visual anomalies following sustained ketamine abuse.

Main Methods:

  • Case report presentation.
  • Review of existing literature on ketamine's effects on memory and synaptic plasticity.
  • Analysis of user-reported symptoms including impaired recall, attention deficits, and visual disturbances.

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Main Results:

  • The case study details a user with persistent impaired recall and attention.
  • A subtle visual anomaly was reported, continuing after ketamine cessation.
  • Findings are considered within the context of existing neurobiological studies on ketamine.

Conclusions:

  • Chronic high-dose ketamine use may lead to persistent cognitive deficits and visual disturbances in humans.
  • Further research is needed to fully understand the long-term neurological consequences of recreational ketamine abuse.
  • This case highlights the potential neurotoxicity associated with nonmedical ketamine consumption.