Library/Electrolytes/Sodium/128

Sodium of 128 mmol/LWhat it means, and what usually happens next

128mmol/L Sodium
Moderately low
125130135146

A sodium of 128 mmol/L is in the 125 to 129 mmol/L range European guidelines call moderate hyponatraemia.

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Sodium128mmol/L
Where it fallsModerately low
The usual range135 to 145 mmol/L

What usually happens next

See your doctor soon. Water pills, some antidepressants, drinking very large amounts of water and conditions that hold on to water are the usual reasons.

What a low sodium usually means, and its common causes

When a sodium can read wrong

A very high blood sugar pulls water into the blood and lowers sodium on paper. Very high triglycerides or protein can do the same on some analysers. Sodium mostly tracks water, not salt in the diet.

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Questions

Is a sodium of 128 mmol/L normal?

A sodium of 128 mmol/L is in the 125 to 129 mmol/L range European guidelines call moderate hyponatraemia. The usual range is 135 to 145 mmol/L.

Worked out by LifeFrom from the European hyponatraemia guideline and the usual lab range, and not yet reviewed by a clinician. For your own understanding: only a lab test, read by your clinician, diagnoses anything.