A patient with chronic congestive heart failure has repeated hospitalizations despite ongoing treatment with hydrochlorothiazide (HydroDIURIL) and digoxin. The prescriber has ordered spironolactone (Aldactone) to be added to this patient’s drug regimen, and the nurse provides education about this medication. Which statement by the patient indicates understanding of the teaching?

Choice A reason: Salt substitutes contain potassium, which risks hyperkalemia with spironolactone, a potassium-sparing diuretic. This is dangerous, so it’s incorrect for understanding. Choice B reason: Spironolactone spares potassium, so stopping supplements prevents hyperkalemia, a serious risk. This shows correct understanding, making it the correct choice. Choice C reason: Spironolactone reduces fluid, not causes overhydration. Monitoring for dehydration is more relevant, so this is incorrect for the medication’s effects. Choice D reason: Spironolactone’s effects take days to weeks, not hours. Immediate improvement is unrealistic, so this is incorrect for proper patient understanding.