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Cognitive performance in recreational users of MDMA or 'ecstasy': evidence for memory deficits

Department of Psychology, University of East London, London E15 4LZ, UK

A. Lees

Department of Psychology, University of East London, London E15 4LZ, UK

N.J. Garnham

Department of Psychology, University of East London, London E15 4LZ, UK

M. Jones

Department of Psychology, University of East London, London E15 4LZ, UK

K. Wesnes

Cognitive Drug Research (CDR), Priory Court, Beech Hill, Reading RG7 2BJ, UK

Cognitive task performance was assessed in three groups of young people: 10 regular users of 3,4- methylenedioxymethamphetamine (MDMA) who had taken 'ecstasy' 10 times or more; 10 novice MDMA users who had taken 'ecstasy' one to nine times; and 10 control subjects who had never taken MDMA. A computerized battery of cognitive tasks (Cognitive Drug Research system) was undertaken on a day when subjects were drug free. Performance on the response speed and vigilance measures (simple reaction time, choice reaction time, number vigilance), was similar across the three subgroups. However on immediate word recall and delayed word recall, both groups of MDMA users recalled significantly less words than controls. Animal research has shown that MDMA can lead to serotonergic neurodegeneration, particularly in the hippocampus and frontal cortex. Although the design of this study was far from ideal, these data are consistent with other findings of memory decrements in recreational MDMA users, possibly caused by serotonergic neurotoxicity.

Key Words: cognition • 'ecstasy' • memory • methylenedioxymethamphetamine • performance • psychoactive drug • recreational drug

Journal of Psychopharmacology, Vol. 12, No. 1, 79-83 (1998)
DOI: 10.1177/026988119801200110


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