What are the consequences of a serum sodium level being either too high or too low?

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Topic: Medications
Author: Robertson, Gary
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Abnormalities in serum sodium primarily affect the brain. These effects vary depending on the severity and rapidity of the abnormality and can range all the way from mild weakness, lethargy and confusion all the way to convulsions, coma and rarely, even death. Most of the effects are reversible when the abnormality in serum sodium is corrected but occasionally, especially in patients with severe hypernatremic dehydration, small strokes occur that permanently damage the brain.