Management of Hyponatremia in Elderly Patients

Introduction to Hyponatremia Risk

All selective serotonin reuptake inhibitors (SSRIs), including escitalopram, can cause the syndrome of inappropriate antidiuretic hormone secretion (SIADH), leading to hyponatremia, as noted by the American Geriatrics Society 1, 2

The European Society of Cardiology recommends caution with mirtazapine in elderly patients due to the risk of orthostatic hypotension, especially in patients with a history of falls 3
Mirtazapine is a preferred choice but requires careful monitoring of sodium levels, as all antidepressants carry a risk of hyponatremia in elderly patients 3

Elderly patients are particularly vulnerable to orthostatic hypotension due to decreased baroreceptor response, as highlighted by the European Society of Cardiology 3
Patients with a history of falls have a high risk of serious consequences from orthostatic hypotension caused by medications, according to the European Society of Cardiology 3

The American Geriatrics Society emphasizes that age is a major risk factor, with criteria highlighting that antidepressants can cause hyponatremia in elderly patients 1, 2
The Annals of Oncology suggests that if an antidepressant with sedative properties is required, alternatives with a lower risk of orthostatic hypotension should be carefully considered, and sodium levels should be corrected cautiously (not more than 8-10 mmol/L per day) to avoid osmotic demyelination syndrome 4