Acute GP service
This is a site intended for clinicians - all guidelines must be interpreted in the context of clinical risk assessment
Hypernatraemia is rare but has a high mortality rate (>50%). Management advice is available here.
If Na+>145 seek expert advice.
Na <115 mmol/L (severe hyponatraemia)
OR patient is symptomatic:
Lethargy and apathy (associated with slow-onset hyponatraemia).
Late symptoms (associated with severe or rapid-onset hyponatraemia).
OR patient has signs of hypovolaemia.
If Na is in the range 115-124 and the patient is asymptomatic, then seek advice from an endocrinologist, nephrologist, or clinical pathologist regarding admission to hospital or an urgent referral.
For Na >124 see GP Notebook guide.