Cerebral oedema after MDMA (" ecstasy") and unrestricted water intake. Hyponatraemia must be treated with low water input.

Abstract

In case 1 the patient was reported to have a plasma sodium concentration of 119 mmol/l and a plasma osmolality of 156 mmol/kg. Some time later the urine sodium concentration was 6 mmol/l and urine osmolality 655 mmol/kg. In case 2 the patient was reported to have a …