Memory and mood during MDMA intoxication, with and without memantine pretreatment

Area of Science:

• Neuroscience
• Psychopharmacology

Background:

• Single doses of MDMA are known to affect mood and impair memory in humans.
• The precise neuropharmacological mechanisms underlying MDMA-induced memory impairment remain unclear.
• Previous research in rats suggested memantine, an NMDA and alpha 7 nicotinic acetylcholine receptor antagonist, could reverse MDMA-induced memory deficits.

Purpose of the Study:

• To investigate the potential of memantine as a preventative treatment against MDMA-induced memory impairment in humans.
• To determine if memantine alters the mood and psychomotor effects of MDMA in human participants.

Main Methods:

• A double-blind, placebo-controlled, within-subject study involving 15 human participants.
• Participants received pre-treatment with either placebo or memantine (20 mg) 120 minutes before receiving either placebo or MDMA (75 mg).
• Memory function was assessed using multiple tasks, alongside mood and psychomotor performance evaluations.

Main Results:

• MDMA significantly impaired performance on the visual verbal learning and abstract visual pattern learning tasks.
• Pre-treatment with memantine did not prevent the observed MDMA-induced memory impairments.
• MDMA increased both positive and negative mood states, effects not altered by memantine pre-treatment.

Conclusions:

• Preliminary findings suggest memantine does not reverse MDMA-induced memory impairment or alter its mood effects in humans.
• Memantine alone did not significantly affect memory or mood in this study.
• Further research is needed to elucidate the mechanisms of MDMA-induced cognitive deficits and potential interventions.