Finerenone is a new type of medicine used to treat kidney and heart problems, especially in people with chronic kidney disease (CKD) linked to type 2 diabetes. It is a non-steroidal mineralocorticoid receptor blocker (MRA), which is a type of drug. While older medicines in this group, such as spironolactone and eplerenone, have been used for years, finerenone works in a more selective way and may cause fewer side effects.