Acute hyponatremia becomes symptomatic at what level of serum sodium concentration?

Ans. is 'c' i.e., <120 mEq/L Acute Hyponatremia* Cases of acute hyponatremia are defined as those developed in < 48 hours of duration.* These patients are usually symptomatic if hyponatremia is severe i.e. < 120mEq/L.* These patients are at greatest risk of development of neurologic symptoms but rarely develop demyelination.* Sodium levels in these patients should be corrected to relatively higher levels quickly.