How common is new-onset hyponatremia during antidepressant treatment?

Question from a Member: What percentage of the elderly get hyponatremia with SSRI treatment? I am always concerned about hyponatremia while prescribing SSRIs in the elderly. How common is it? The problem Serum sodium is not being routinely measured after starting a serotonergic antidepressant in elderly patients. Also, the symptoms in persons with hyponatremia are…