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Cognitive performance in (+/-) 3,4-methylenedioxymethamphetamine (MDMA, "ecstasy") users: a controlled study.

U D McCann1, M Mertl, V Eligulashvili

  • 1Unit on Anxiety, Biological Psychiatry Branch, NIMH, Bethesda, MD 20892-1272, USA. umccann@helix.nih.gov

Psychopharmacology
|June 15, 1999
PubMed
Summary
This summary is machine-generated.

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Recreational use of 3,4-Methylenedioxymethamphetamine (MDMA) may cause neurotoxic effects on serotonin neurons. MDMA users showed significant cognitive deficits in attention, memory, and reasoning, linked to reduced brain serotonin function.

Area of Science:

  • Neuroscience
  • Psychopharmacology
  • Cognitive Psychology

Background:

  • 3,4-Methylenedioxymethamphetamine (MDMA) is a recreational drug known to damage serotonin (5-HT) neurons in animals.
  • Functional consequences of MDMA-induced serotonin neurotoxicity in humans are not well understood.

Purpose of the Study:

  • To investigate the impact of previous MDMA exposure on cognitive functions beyond memory.
  • To explore the relationship between MDMA use, serotonin neuron integrity, and cognitive performance.

Main Methods:

  • A controlled inpatient study assessed cognitive performance in 22 MDMA users (abstinent ≥ 3 weeks) and 23 controls using a computerized battery.
  • Cerebrospinal fluid (CSF) monoamine metabolite levels were measured to assess brain monoaminergic function.

Related Experiment Videos

Main Results:

  • MDMA users exhibited significant deficits in sustained attention with arithmetic, complex attention with incidental learning, short-term memory, and semantic recognition/verbal reasoning.
  • MDMA users showed selective reductions in CSF 5-hydroxyindoleacetic acid (5-HIAA), an indicator of serotonin turnover.

Conclusions:

  • CSF findings support MDMA's neurotoxic effect on human serotonin neurons.
  • Observed cognitive deficits in MDMA users are associated with serotonin system impairment.