What is the sodium level below which symptomatic hyponatremia occurs?

Answer – C

• Symptomatic hyponatremia usually does not occur until the serum sodium level is ≤120 mEq/L.

Symptomatic Hyponatremia

• Neurologic symptoms are present,
• 3% normal saline should be used to increase the sodium
• Increase of sodium level should be not more than 1 mEq/L per hour until the serum sodium level reaches 130 mEq/L or neurologic symptoms are improved.

Asymptomatic hyponatremia

• Increase the sodium level by not more than 0.5 mEq/L per hour
• Maximum increase of sodium levels of 12 mEq/L per day