Beer Potomania—An Unusual Cause of Hyponatremia

The first case of severe hyponatremia, since referred to as beer potomania, in a heavy beer drinker patient was reported in 1972. Excessive consumption of beer in particular, which has a low solute content, may result in severe hyponatremia. We report a case of severe hyponatremia that occurred in a patient who, owing to his underlying colon cancer, was drinking beer and ingesting little food.