Long-term neurocognitive side effects of MDMA in recreational ecstasy users following sustained abstinence: A systematic review and meta-analysis.
Journal of psychopharmacology (Oxford, England) – November 19, 2025
Source: PubMed
Summary
Even after sustained abstinence, individuals with a history of 3,4-methylenedioxy-N-methamphetamine (MDMA) use may not fully recover certain cognitive functions. Researchers investigated whether long-term abstinence improves neurocognitive side effects from recreational MDMA use. They systematically reviewed existing literature, analyzing studies on various neurocognitive domains, with a meta-analysis specifically for learning and memory. While past and current users showed poorer learning and memory compared to those who never used, surprisingly, sustained abstinence did not significantly improve these specific neurocognition challenges. Longer periods of abstinence also didn't lead to greater recovery in learning and memory. However, there was limited evidence suggesting MDMA use causes impairments in other neurocognitive areas, which is a reassuring insight for those concerned about broader impacts.
Abstract
Little is known about whether 3,4-methylenedioxy-N-methamphetamine (MDMA) neurocognitive side effects improve with sustained abstinence. This study aimed to systematically review and synthesise the existing literature on the long-term neurocognitive side effects of recreational MDMA use after a minimum of 6 months of abstinence. We searched relevant databases utilising terms related to (1) MDMA and (2) neurocognition. A qualitative synthesis of study findings was organised with reference to the neurocognitive domains defined in the Diagnostic and Statistical Manual of Mental Disorders Fifth Edition (DSM5). Fourteen articles met the inclusion criteria, assessing learning and memory (n = 8), executive function (n = 10), complex attention (n = 5), language (n = 2) and perceptual motor function (n = 1). Meta-analysis and assessment of bias were undertaken only for the domain of 'learning and memory' and included five studies. People with current and previous MDMA use had poorer learning and memory performance compared to people who were MDMA-naïve (Hedges' g = -1.06 and -1.37, respectively); there was no significant difference between current and abstinent MDMA users (Hedges' g = 0.03). A longer period of abstinence did not demonstrate greater improvements or recovery in learning and memory. There was limited evidence to conclude that MDMA use is associated with neurocognitive impairments in other domains. Overall, these conclusions are based on low-quality findings.