Eplerenone was developed by Pharmacia Corporation , which was acquired by Pfizer in 2002.  It was marketed by Pfizer under the trade name Inspra . The US Food and Drug Administration (FDA) approved the drug for sale in the United States in 2002.  Eplerenone is currently approved for sale in the US, EU, Netherlands and Japan.  Relative to dosage, eplerenone costs an estimated $2.93 per day when treating congestive heart failure and $5.86 per day when treating hypertension . 
Eplerenone is used alone or in combination with other medications to treat high blood pressure. Eplerenone is in a class of medications called mineralocorticoid receptor antagonists. It works by blocking the action of aldosterone, a natural substance in the body that raises blood pressure.
Treating high blood pressure alone or along with other medicines. It is also used to improve survival in patients who have certain heart problems (left ventricular systolic dysfunction and congestive heart failure) following a heart attack. It may also be used for other conditions as determined by your doctor.
This medication is used alone or in combination with other medicines to treat high blood pressure . It works by blocking a chemical (aldosterone) in your body which in turn lowers the amount of sodium and water the body retains. Lowering high blood pressure helps prevent strokes, heart attacks and kidney problems. It is also used to treat congestive heart failure following a heart attack .