angiotensin converting enzyme (ACE) inhibitors have been associated with dilutional hyponatremia (1):
ACE inhibitors alone can precipitate hyponatremia without co-administration of thiazide diuretics
hyponatremia induced by ACE inhibitors appears to be dilutional and is accompanied by features of SIADH
discontinuing the ACE inhibitor leads to resolution of the hyponatremia.
Reference:
Falhammar H et al. Associations Between Antihypertensive Medications and Severe Hyponatremia: A Swedish Population–Based Case–Control Study. J Clin Endocrinol Metab. 2020 Apr 14;105(10)
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