Spironolactone is used to treat fluid retention (oedema) caused by liver disease, kidney problems or heart failure. Oedema occurs when fluid leaks out of your blood vessels, causing swelling in the tissues of your lungs, feet or ankles. This makes you feel breathless or your legs feel puffy. Spironolactone prevents a build-up of fluid in your body by increasing the amount of urine your kidneys produce. It is also used to treat some other conditions which cause fluid retention, such as a disorder called primary hyperaldosteronism.
This is a companion discussion topic for the original article at https://patient.info/medicine/spironolactone-aldactone