Cited by 317Schizophrenia research and treatmentNeurotransmitter Receptor Influence on BehaviorTreatment of Major Depression

Comparative and Interactive Human Psychopharmacologic Effects of Ketamine and Amphetamine: Implications for Glutamatergic and Dopaminergic Model Psychoses and Cognitive Function

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Krystal, John H., Perry, Edward B., Gueorguieva, Ralitza, Belger, Aysenil, Madonick, Steven H., Abi-Dargham, Anissa, Cooper, Thomas B., MacDougall, Lisa +2 more·2005·Archives of General Psychiatry

Abstract

BACKGROUND: In healthy individuals, ketamine hydrochloride and amphetamine sulfate produce cognitive, behavioral, and subjective effects resembling endogenous psychoses. Studying the comparative and interactive effects of these agents may provide insights into the roles of the glutamate and monoamine systems in psychosis and cognition. OBJECTIVES: To directly compare the effects of ketamine and amphetamine and to explore their interactive effects within individuals. DESIGN: Placebo-controlled, randomized, double-blind psychopharmacologic trial. SETTING AND PARTICIPANTS: Forty-one healthy individuals recruited from the community who completed up to 4 test days. MAIN OUTCOME MEASURES: On each test day, participants received amphetamine (a 1-minute infusion of amphetamine sulfate, 0.25 mg/kg, or saline) and ketamine (a 1-minute intravenous infusion of ketamine, 0.23 mg/kg, followed by a 1-hour infusion of 0.5 mg/kg or an identical saline bolus and infusion). The order of amphetamine and ketamine infusions was randomized. RESULTS: At the doses studied, ketamine and amphetamine produced positive symptoms and euphoria. However, perceptual changes were produced only by ketamine, and hostility, grandiosity, and somatic concern were stimulated only by amphetamine. Amphetamine and ketamine produced conceptual disorganization, but only ketamine produced concrete ideation and unusual mannerisms. Ketamine produced negative symptoms and disrupted delayed recall. Ketamine and amphetamine showed 3 types of interactive effects: (1) amphetamine attenuated the impairment of working memory produced by ketamine; (2) amphetamine and ketamine had additive effects on thought disorder, arousal, and euphoria; and (3) amphetamine and ketamine had less-than-additive effects on psychosis. CONCLUSIONS: These findings implicate N-methyl-D-aspartate glutamate receptors and dopamine systems in psychosis. However, glutamate and dopamine may differentially contribute to psychosis, thought disorder, and euphoria. Regarding medication development for cognitive dysfunction, the pattern of the interactive effects of ketamine and amphetamine is consistent with the hypothesis that facilitation of prefrontal cortical dopamine levels would attenuate some cognitive impairments associated with deficits in N-methyl-D-aspartate receptor function.

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Crossref · 10.1001/archpsyc.62.9.985

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Authors
Krystal, J. H., Perry, E. B., Gueorguieva, R., Belger, A., Madonick, S. H., Abi-Dargham, A., Cooper, T. B., MacDougall, L., Abi-Saab, W., & D’Souza, D. C.
Affiliations
  • Yale University (US)
  • Columbia University (US)
Venue
Archives of General Psychiatry
Published
2005-09-01
Volume
62
Issue
9
Pages
985
ISSN
0003-990X (ISSN-L)
OpenAlex
W2071199266
Cited by
317
References
69
Citations by year
2026: 2 · 2025: 10 · 2024: 9 · 2023: 8 · 2022: 16 · 2021: 11 · 2020: 13 · 2019: 13 · 2018: 13 · 2017: 19 · 2016: 18 · 2015: 18 · 2014: 18 · 2013: 19 · 2012: 21
FWCI
8.09
Type
journal article
Language
en
Open access
Locations
  • Archives of General Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • Newcastle University ePrints (Newcastle Univesity)
Funders
  • National Institutes of Health (5k05aa014906-03)
  • National Institute on Alcohol Abuse and Alcoholism (P50 AA-12870-03, K05 AA014906-01, P50AA012870)
  • National Institute of Mental Health (P50MH068789)
  • National Center for Research Resources (M01RR000125)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
Keywords
ketamine, amphetamine, psychosis, NMDA receptor, dopamine, glutamate, thought disorder, euphoria, working memory, cognitive impairment, drug interactions, conceptual disorganization, negative symptoms, prefrontal cortex
MeSH terms
Amphetamine, Cognition, Dopamine, Double-Blind Method, Drug Interactions, Glutamine, Humans, Ketamine, Placebos, Psychoses, Substance-Induced, Receptors, N-Methyl-D-Aspartate, Prefrontal Cortex

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