Aldactone is used to treat Hypokalemia. The generic version is called Spironolactone. The average Aldactone cash price is about $54.41 for a supply of Tablet 25 MG 30 pcs. You can reduce your Aldactone cost by up to 75% with our free Aldactone discount card. Bring it to a participating pharmacy near you to save on your prescription medication.