<unk>  is an aldosterone antagonist that is FDA approved for the treatment of Primary hyperaldosteronism,edematous conditions of congestive heart failure, Cirrhosis of the liver accompanied by edema and/or ascites, nephrotic syndrome, essential hypertension. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include gynecomastia, diarrhea, nausea and vomiting, somnolence, disorder of menstruation, impotence.
Spironolactone
Chlorothiazide 
Cyclothiazide
Amiloride
Hydrochlorothiazide
Furosemide 
Methyclothiazide
Torsemide 