PulmCCM - November 17, 2018
"Severe hyponatremia (often defined as a serum sodium < 120 mEq/L) occurs most often in people with pituitary or lung tumors, those taking antipsychotic or other neuroleptic drugs, heavy beer drinkers, or the elderly. Usually sodium levels decline slowly over weeks or months prior to detection, allowing time for the brain to compensate, with only minor neurologic symptoms.
Sodium levels will often return to normal just as slowly, with minimal intervention by physicians (change in drug therapy, fluid restriction, etc). But new evidence shows that when patients with hyponatremia get admitted to the hospital, their impatient treatment teams often correct sodium levels too quickly, increasing the risk for dangerous complications..."
Source: Clin J Am Soc Nephrol.