The incidence of hyponatremia in people using MDMA

This study aims to determine the incidence of mild acute hyponatraemia in attendees of dance events by comparing visitors reporting recent MDMA use with non-users using a cross-sectional point-of-care approach.

Methods: participants are approached in a chill-out area from ~03:30 until the end of the event; measurements include ambient temperature, time at contact, weight/height, capillary sodium via fingerprick, urine dipstick for drug use and a short questionnaire on drug, alcohol and fluid intake. All materials and identifiers are destroyed same night; small token (ice cream) provided.