Acute psychomotor, memory and subjective effects of MDMA and THC co-administration over time in healthy volunteers

  • Dumont G
  • Van Hasselt J
  • De Kam M
 et al. 
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Abstract

In Western societies a considerable percentage of young people expose themselves to the combination of 3,4-methylenedioxymethamphetamine (MDMA or 'ecstasy') and cannabis. The aim of the present study was to assess the acute effects of co-administration of MDMA and THC (the main psychoactive compound of cannabis) on pharmacokinetics, psychomotor performance, memory and subjective experience over time. We performed a four-way, double blind, randomized, crossover, placebo-controlled study in 16 healthy volunteers (12 male, four female) between the ages of 18 and 27. MDMA (100 mg) was given orally, THC (4, 6, and 6 mg, interval of 90 min) was vaporized and inhaled. THC induced more robust cognitive impairment compared with MDMA, and co-administration did not exacerbate single drug effects on cognitive function. However, co-administration of THC with MDMA increased desired subjective drug effects and drug strength compared with the MDMA condition, which may explain the widespread use of this combination.

Author-supplied keywords

  • MDMA
  • cannabis
  • co-administration
  • memory
  • psychomotor
  • subjective effects

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Authors

  • Coen van HasseltIcahn School of Medicine Mount Sinai

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  • G. J H Dumont

  • M. De Kam

  • J. M A Van Gerven

  • D. J. Touw

  • J. K. Buitelaar

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