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Table 2 Thresholds for intervention with intravenous dextrose 5% in the context of sodium rise following tolvaptan dose

From: Tolvaptan versus fluid restriction in acutely hospitalised patients with moderate-profound hyponatraemia (TVFR-HypoNa): design and implementation of an open-label randomised trial

Rise in serum sodium

Time post-tolvaptan

Action

> 6 mmol/L

Within 6 h

Commence IV dextrose 5% at rate equivalent to urine output, continue to monitor frequently and cease when sodium back within target range

> 8 mmol/L

Within 12 h

> 10 mmol/L

Within 24 h

Aim for re-lowering with bolus hypotonic fluid