- ACRONYMS AND DEFINITIONS
- ACR - Albumin-to-creatinine ratio
- CKD - Chronic kidney disease
- CrCl - Creatinine clearance
- CVD - Cardiovascular disease
- DBP - Diastolic Blood Pressure
- DKD - Diabetic kidney disease
- GFR - Glomerular Filtration Rate
- HFrEF - Heart failure with reduced ejection fraction
- MI - Myocardial infarction
- NYHA - New York Heart Association heart failure classification
- RCT - Randomized controlled trial
- SBP - Systolic Blood Pressure
- DRUGS IN CLASS
- Mineralocorticoid receptor antagonist
- Finerenone is a nonsteroidal mineralocorticoid receptor antagonist. It differs from other mineralocorticoid receptor antagonists (spironolactone and eplerenone) in that its chemical structure is not based on a steroid molecule.
- MECHANISM OF ACTION
- Aldosterone is a mineralocorticoid secreted by the adrenal glands. Its release is stimulated by rising serum potassium levels and angiotensin II (see potassium regulation for more). Aldosterone acts primarily in the renal collecting duct, where it stimulates the uptake of sodium and water in exchange for potassium. The effects of aldosterone are greatly dependent upon the amount of sodium in the renal collecting duct.
- Finerenone blocks aldosterone receptors in the collecting duct. It also blocks mineralocorticoid receptors in nonepithelial tissues (e.g. heart, blood vessels). Finerenone has no relevant affinity for androgen, progesterone, estrogen, or glucocorticoid receptors.
- Nephron and diuretics illustration - illustration of the nephron and how diuretics work
- FDA-APPROVED INDICATIONS
- Finerenone (Kerendia®)
- CKD from type 2 diabetes - to reduce the risk of sustained eGFR decline, end-stage kidney disease, cardiovascular death, nonfatal myocardial infarction, and hospitalization for heart failure in adult patients with chronic kidney disease associated with type 2 diabetes.
- DIABETIC KIDNEY DISEASE
- Overview
- Two large studies have looked at the effects of finerenone on clinical outcomes in patients with type 2 diabetes and chronic kidney disease. The first study detailed below (FIDELIO-DKD) looked at kidney disease outcomes, and the second study (FIGARO-DKD) evaluated cardiovascular outcomes.
- The FIDELIO-DKD trial enrolled 5734 patients with type 2 diabetes and CKD
Main inclusion criteria
- Type 2 diabetes
- Treated with maximally-tolerated ACE/ARB
- CKD defined as one of the following:
- Urine ACR 30 to <300 + GFR 25 - 59 ml/min + diabetic retinopathy
- Urine ACR 300 - 5000 + GFR 25 - 74 ml/min
Main exclusion criteria
- Serum potassium > 4.8 mEq/L
- Non-diabetic kidney disease
- HgA1C > 12%
- SBP ≥ 170, DBP ≥ 110
- NYHA class II - IV HFrEF
Baseline characteristics
- Average age 66 years
- Average A1C - 7.7%
- Average GFR - 44.3 ml/min
- Median ACR - 852
- Average SBP - 138 mmHg
Randomized treatment groups
- Group 1 (2833 patients): Finerenone group: GFR 25 - 59 ml/min: 10 mg once daily | GFR ≥ 60 ml/min: 20 mg once daily
- Group 2 (2841 patients): Placebo
- For those starting at 10 mg, an increase in the dose from 10 to 20 mg once daily was encouraged after 1 month, provided the serum potassium level was ≤ 4.8 mEq/L and the GFR was stable
- Study drug was held if potassium exceeded 5.5 mEq/L and restarted when potassium fell to ≤ 5 mEq/L
- A decrease in the dose from 20 to 10 mg once daily was allowed any time after the initiation of finerenone or placebo
- Concomitant eplerenone, spironolactone, any renin inhibitor, or potassium-sparing diuretic was not allowed
- Average finerenone dose during the study was 15.1 mg
Primary outcome: Composite of kidney failure, a sustained decrease of at least 40% in the eGFR from baseline over a period of at least 4 weeks, or death from renal causes
Results
Duration: Median of 2.6 years | |||
Outcome | Finerenone | Placebo | Comparisons |
---|---|---|---|
Primary outcome | 17.8% | 21.1% | HR 0.82, 95%CI [0.73 - 0.93], p=0.001 |
Kidney failure | 7.3% | 8.3% | HR 0.87, 95%CI [0.72 - 1.05] |
GFR decrease ≥ 40% | 16.9% | 20.3% | HR 0.81, 95%CI [0.72 - 0.92] |
Death from renal causes | <0.1% | <0.1% | N/A |
Overall mortality | 7.7% | 8.6% | HR 0.90, 95%CI [0.75 - 1.07] |
Hyperkalemia | 18.3% | 9% | N/A |
Serious hyperkalemia | 1.6% | 0.4% | N/A |
|
Findings: In patients with CKD and type 2 diabetes, treatment with finerenone resulted in
lower risks of CKD progression and cardiovascular events than placebo.
- The FIGARO-DKD study enrolled 7437 patients with type 2 diabetes and CKD
Main inclusion criteria
- Type 2 diabetes
- Treated with maximally-tolerated ACE/ARB
- CKD defined as one of the following:
- Urine ACR 30 to <300 + GFR 25 - 90 ml/min
- Urine ACR 300 - 5000 + GFR ≥ 60 ml/min
Main exclusion criteria
- Serum potassium > 4.8 mEq/L
- Non-diabetic kidney disease
- HgA1C > 12%
- SBP ≥ 170, DBP ≥ 110
- NYHA class II - IV HFrEF
Baseline characteristics
- Average age 64 years
- Average A1C - 7.7%
- Average GFR - 68 ml/min
- Median ACR - 308
- Average SBP - 136 mmHg
- History of CVD - 45%
Randomized treatment groups
- Group 1 (3686 patients): Finerenone group: GFR 25 - 59 ml/min: 10 mg once daily | GFR ≥ 60 ml/min: 20 mg once daily
- Group 2 (3666 patients): Placebo
- For those starting at 10 mg, an increase in the dose from 10 to 20 mg once daily was encouraged after 1 month, provided the serum potassium level was ≤ 4.8 mEq/L and the GFR was stable
- Study drug was held if potassium exceeded 5.5 mEq/L and restarted when potassium fell to ≤ 5 mEq/L
- A decrease in the dose from 20 to 10 mg once daily was allowed any time after the initiation of finerenone or placebo
- Concomitant eplerenone, spironolactone, any renin inhibitor, or potassium-sparing diuretic was not allowed
- Average finerenone dose during the study was 17.5 mg
Primary outcome: Composite of death from cardiovascular causes, nonfatal myocardial infarction,
nonfatal stroke, or hospitalization for heart failure
Results
Duration: Median of 3.4 years | |||
Outcome | Finerenone | Placebo | Comparisons |
---|---|---|---|
Primary outcome | 12.4% | 14.2% | HR 0.87, 95%CI [0.76 - 0.98], p=0.03 |
Death from CV causes | 5.3% | 5.8% | HR 0.90, 95%CI [0.74 - 1.09] |
Nonfatal MI | 2.8% | 2.8% | HR 0.99, 95%CI [0.76 - 1.31] |
Nonfatal stroke | 2.9% | 3.0% | HR 0.97, 95%CI [0.74 - 1.26] |
Hospitalization for heart failure | 3.2% | 4.4% | HR 0.71, 95%CI [0.56 - 0.90] |
Overall mortality | 9.0% | 10.1% | HR 0.89, 95%CI [0.77 - 1.04] |
Hyperkalemia | 10.8% | 5.3% | N/A |
Serious hyperkalemia | 0.7% | 0.1% | N/A |
|
Findings: Among patients with type 2 diabetes and stage 2 to 4 CKD with moderately elevated albuminuria or stage 1 or 2 CKD with severely elevated albuminuria, finerenone therapy improved cardiovascular outcomes as compared with placebo.
- Professional recommendations
- Summary
- In the two trials above, finerenone improved CV and CKD outcomes in patients with diabetes and DKD. Patients in the finerenone group achieved a slightly lower blood pressure which may have accounted for some of its effects. In the FIGARO-DKD study that looked at CV outcomes, hospitalization for heart failure was the only component of the primary outcome that finerenone had a significant effect on; other aldosterone antagonists (spironolactone and eplerenone) have previously been found to improve heart failure outcomes.
- In both trials, finerenone more than doubled the risk of hyperkalemia. In the CKD trial (FIDELIO), 18% of finerenone-treated patients had hyperkalemia, and 11% received potassium-lowering agents during the trial. This occurred despite the fact that potassium-raising medications outside of ACE inhibitors and ARBs were prohibited, and subjects with baseline potassium levels > 4.8 mEq/L were excluded from the trial. In practice, patients are unlikely to be monitored as closely as they are in a controlled trial, so it is important that prescribers are aware of the risks when prescribing finerenone.
- One question that the trials above raise is whether or not the other aldosterone antagonists (spironolactone and eplerenone) also improve renal outcomes. It's likely they would have performed as well in the FIGARO (CVD) trial, but their effects on renal outcomes have not been evaluated extensively. Small trials in CKD patients have shown that spironolactone and eplerenone decrease proteinuria and may improve GFR over time. These drugs have been around for many years and have generics that are much cheaper than finerenone. [1,2]
- SIDE EFFECTS
- Hyperkalemia
- Finerenone blocks the effects of aldosterone in the renal collecting duct (see nephron and diuretics illustration), and this can cause potassium levels to rise. In the FIDELIO-DKD trial, the incidence of hyperkalemia was 18.3% in finerenone-treated patients and 9% in placebo-treated patients. In the FIGARO-DKD trial, hyperkalemia occurred in 10.8% and 5.3%, respectively.
- Finerenone should not be initiated in patients with a potassium > 5 mEq/L
- See potassium monitoring for recommendations on checking potassium levels and adjusting doses
- Hypotension
- Finerenone may cause a decrease in blood pressure that can lead to hypotension. In the FIDELIO-DKD trial, the average SBP was lower by 3 mmHg in the finerenone group, and hypotension was reported by 4.8% of finerenone-treated patients and 3.4% of placebo-treated patients.
- Hyponatremia
- Finerenone promotes the loss of sodium in the renal collecting duct (see nephron and diuretics illustration), which may lead to hyponatremia. In the FIDELIO-DKD trial, hyponatremia occurred in 1.4% of finerenone-treated patients and 0.7% of placebo-treated patients.
- Decrease in eGFR (increase in serum creatinine)
- eGFR may decrease slightly when initiating finerenone, and serum creatinine may increase. In the FIDELIO-DKD trial, the average decrease in eGFR at 4 months was 3.18 ml/min in finerenone-treated patients and 0.73 ml/min in placebo-treated patients. The decrease is likely secondary to finerenone-induced volume contraction.
- CONTRAINDICATIONS
- Concomitant treatment with strong CYP3A4 inhibitors
- Adrenal insufficiency
- PRECAUTIONS
- Kidney disease
- CrCl ≥ 60 ml/min: Starting dose 20 mg once daily
- CrCl 25 - 59 ml/min: Starting dose 10 mg once daily
- CrCl < 25 ml/min: Not recommended
- Liver disease
- Mild liver disease (Child-Pugh A): no dose adjustment necessary
- Moderate liver disease (Child-Pugh B): - no dose adjustment necessary; consider additional potassium monitoring
- Severe liver disease (Child-Pugh C): DO NOT USE
- DRUG INTERACTIONS
- NOTE: Drug interactions presented here are NOT all-inclusive. Other interactions may exist. The interactions presented here are meant to encompass commonly prescribed medications and/or interactions that are well-documented. Always consult your physician or pharmacist before taking medications concurrently. CLICK HERE for more information on drug interactions.
- Finerenone
- CYP3A4 strong inhibitors - DO NOT COMBINE. Finerenone is a CYP3A4 sensitive substrate, and CYP3A4 strong inhibitors increase its exposure.
- CYP3A4 moderate and weak inhibitors - finerenone is a CYP3A4 sensitive substrate, and CYP3A4 moderate and weak inhibitors may increase its exposure. Monitor potassium levels closely when combining finerenone with CYP3A4 inhibitors, especially upon initiation and with dose adjustments.
- CYP3A4 strong and moderate inducers - DO NOT COMBINE. Finerenone is a CYP3A4 sensitive substrate, and CYP3A4 strong and moderate inducers decrease finerenone exposure.
- Medications that can raise potassium levels - finerenone has the potential to raise potassium levels and cause hyperkalemia. When combined with other potassium-raising medications, the risk is increased. While it may be appropriate to prescribe finerenone with these medications, patients and providers should be aware of the potential risks. See potassium monitoring for recommendations on checking potassium levels and adjusting finerenone doses.
- Examples of medications that may raise potassium levels include:
- Aldosterone antagonists (spironolactone and eplerenone)
- ARBs (valsartan, olmesartan, etc.)
- ACE inhibitors
- Aliskiren (Tekturna®)
- Cyclosporine (Neoral®)
- ENaC inhibitors (triamterene, amiloride)
- Heparin - heparin raises potassium secondarily by inhibiting aldosterone synthesis. LMWH does not appear to have the same effect. [4]
- Penicillin G potassium injection (1 million units contains 1.68mEq of potassium)
- Potassium supplements (K-Dur®, etc)
- Tacrolimus (Prograf®)
- Trimethoprim (part of Bactrim® and Septra®)
- Voclosporin (Lupkynis®)
- Salt substitutes (No Salt®, No-Salt®, etc.) - salt substitutes typically have a high amount of potassium (16.4 mEq per 1/4 teaspoon). Patients should be aware that this may contribute to elevated potassium levels seen with aldosterone antagonists.
- DOSING
- Dosage form (tablet)
- 10 mg
- 20 mg
- Starting dose
- CrCl ≥ 60 ml/min: 20 mg once daily
- CrCl 25 - 59 ml/min: 10 mg once daily
- CrCl < 25 ml/min: Not recommended
- For patients who are unable to swallow whole tablets, finerenone may be crushed and mixed with water or soft foods such as applesauce immediately prior to use and administered orally
- Potassium monitoring
- Initiating therapy
- Measure serum potassium before initiating therapy
- If potassium is ≤ 4.8 mEq/L, it is okay to initiate finerenone
- if serum potassium levels are >4.8 to 5.0 mEq/L, initiation of finerenone treatment may be considered with additional serum potassium monitoring within the first 4 weeks based on clinical judgment and serum potassium levels
- If potassium is > 5 mEq/L, do not start finerenone
- Monitoring therapy
- Measure serum potassium 4 weeks after initiating treatment and adjust dose (see table below)
- Continue to monitor serum potassium 4 weeks after dose adjustments and throughout treatment, using the table below to adjust doses based on potassium values
- For patients with moderate liver disease (Child-Pugh B), consider additional potassium monitoring
Dose Adjustment Based on Serum Potassium | ||
---|---|---|
Current finerenone dose | ||
Potassium level (mEq/L) | 10 mg | 20 mg |
≤ 4.8 | Increase the dose to 20 mg once daily✝ | Maintain 20 mg once daily |
>4.8 - 5.5 | Maintain 10 mg once daily | Maintain 20 mg once daily |
> 5.5 |
|
|
- Missed doses
- Take a missed dose as soon as possible after it is noticed, but only on the same day. If this is not possible, skip the dose and continue with the next dose as prescribed.
- LONG-TERM SAFETY
- Finerenone was FDA-approved in 2021. It has been evaluated in studies lasting up to a median of 3.4 years. There is no safety data beyond this timeframe.
- BIBLIOGRAPHY
- 1 - PMID 22073219 - Moderate antiproteinuric effect of add-on aldosterone blockade with eplerenone in non-diabetic chronic kidney disease. A randomized cross-over study, PLoS One (2011)
- 2 - PMID 17035949 - Long-term effects of spironolactone on proteinuria and kidney function in patients with chronic kidney disease, Kidney Int (2006)
- 3 - Finerenone PI
- 4 - PMID 22560830 - Use and safety of unfractionated heparin for anticoagulation during maintenance hemodialysis, Am J Kidney Dis (2021)