<unk>  is a potassium-sparing diuretic that is FDA approved for the treatment of edema associated with congestive heart failure, cirrhosis, nephrotic syndrome, steroid, and secondary hyperaldosteronism. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include electrolyte disturbances and hyperuricemia.
Triamterene
Buflomedil
Sildenafil
Cloranolol
Olmesartan
Canrenone
Eluxadoline
Orciprenaline