[Syndrome of inappropriate antidiuretic hormone secretion in the course of treatment with venlafaxine--case report].
ABSTRACT Treatment with some drugs may induce hyponatraemia secondary to the syndrome of inappropriate antidiuretic hormone secretion (SIADH). This is a report of a 52-year-old man who developed hyponatraemia after starting venlafaxine administration. Serum sodium level returned to the normal range following discontinuation of venlafaxine and application of SIADH--treatment within a few days. The study shows that routine assessment of blood electrolytes is needed in patients treated with drugs affecting vasopresin secretion.