<prompt> Acute hyponatremia become symptomatic at:135 mEq125 mEq120 mEq110 meq  <response>: Hyponatremia is commonly defined as a serum sodium 135 mmolL 135 mEqL. In patient with hyponatremia that develops over hours, life-threatening seizures and cerebral edema may occur at values as high as 125 mmolL. In contrast some patients with more chronic hyponatremia that has slowly developed over months to years may be asymptomatic even with serum levels 110 mmol 