MediumNephrologySyndrome of inappropriate antidiuretic hormone secretionca-mccqe1ca-rcpsc-im
A 72-year-old woman presents with confusion and unsteadiness. Serum sodium is 118 mmol/L, and osmolarity suggests hypotonic hyponatraemia. She is euvolaemic on examination, taking a selective serotonin reuptake inhibitor and has no heart, liver or renal failure. There is no seizure activity and symptoms are mild. SIADH is suspected. What is the most appropriate initial management?