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Rare but relevant: MDMA and hyponatraemia.

Maria Rita Garcia1,2,3,4, Nelson G M Gomes1, Diana Dias-da-Silva2,3,4

  • 1REQUIMTE/LAQV, Laboratório de Farmacognosia, Departamento de Química, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal.

Addiction (Abingdon, England)
|December 8, 2025
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Summary

3,4-methylenedioxymethamphetamine (MDMA) use can lead to dangerous hyponatraemia, a severe drop in blood sodium. This review details MDMA

Keywords:
Mollyantidiuretic hormone (ADH)arginine vasopressin (AVP)ecstasyelectrolyte balancehyperthermiahyponatraemiapolydipsia

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Published on: April 23, 2019

Area of Science:

  • Toxicology
  • Pharmacology
  • Emergency Medicine

Background:

  • 3,4-methylenedioxymethamphetamine (MDMA, ecstasy) is a widely used psychoactive drug, particularly among young adults.
  • MDMA is often perceived as safe but can cause serious toxic effects, including hyponatraemia (low blood sodium).
  • MDMA-induced hyponatraemia is a life-threatening condition, especially in women, requiring prompt medical attention.

Purpose of the Study:

  • To review the clinical manifestations and prevalence of MDMA-induced hyponatraemia.
  • To explore the pathophysiological mechanisms underlying this condition.
  • To outline therapeutic strategies for managing MDMA-induced hyponatraemia.

Main Methods:

  • Literature review of clinical case reports and epidemiological studies.
  • Analysis of pathophysiological pathways related to MDMA and sodium balance.
  • Synthesis of current treatment guidelines for hyponatraemia.

Main Results:

  • MDMA-induced hyponatraemia presents with neurological symptoms and is increasingly reported.
  • Women exhibit higher incidence rates and more severe outcomes.
  • Pathophysiological mechanisms involve excessive water intake and impaired sodium regulation.

Conclusions:

  • MDMA-induced hyponatraemia is a significant clinical concern with potentially fatal consequences.
  • Understanding its mechanisms is crucial for effective prevention and treatment.
  • Prompt recognition and management are vital, with particular attention to vulnerable populations like women.