Limited Efficacy of Tolvaptan in Patients with Cirrhosis and Severe Hyponatremia: Real-Life Experience.

BACKGROUND: Vaptans, vasopressin selective V2-receptor antagonists, represent the first pharmacologic approach to the treatment of hypervolemic hyponatremia in cirrhosis. However, information on the use of vaptans for patients with cirrhosis and hyponatremia in a real-life scenario is limited. Therefore, this study evaluated the effect of tolvaptan on serum sodium in patients with cirrhosis and severe hypervolemic hyponatremia.

METHODS: Nine patients with cirrhosis and serum sodium ≤125 mEq/L were included.

RESULTS: Only 2 of the 9 patients (22%) gained an increase in serum sodium >130 mEq/L that persisted throughout treatment. In the remaining patients, serum sodium did not change or increased during the first days but decreased thereafter despite continuation of treatment. Only 1 patient developed hyperkalemia as a side effect.

CONCLUSIONS: The efficacy of tolvaptan in patients with cirrhosis and severe hypervolemic hyponatremia seems to be limited.