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A Study Comparing the Clinical Benefit of Finerenone Versus a Fixed Dose Combination (FDC) of Extended-Release Torsemide and Spironolactone in Patients With Hypertension and Chronic Kidney Disease

A Randomized, Parallel, Two Arm Study Comparing the Net Clinical Benefit of Finerenone Versus a Fixed Dose Combination of Extended-Release Torsemide and Spironolactone in Patients With Hypertension and PRoteinuric ChrOnic KidNey Disease

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07223502
Acronym
NEPHRON
Enrollment
30
Registered
2025-10-31
Start date
2025-12-01
Completion date
2026-10-01
Last updated
2026-03-09

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Hypertension (HTN)

Keywords

radomized, two arm, parallel, torsemide, finerenone, spironolactone, fixed-dose combination, extended-release

Brief summary

A study Comparing the Clinical Benefit of Finerenone Versus a Fixed-Dose Combination (FDC) of Extended-Release Torsemide and Spironolactone in Patients with Hypertension and Chronic Kidney Disease.

Detailed description

SAR-ERTSP-01P, A Randomized, Parallel, Two-Arm Study Comparing the Net Clinical Benefit of Finerenone Versus a Fixed-Dose Combination of Extended-Release Torsemide and Spironolactone in Patients with Hypertension and PRoteinuric ChrOnic KidNey Disease (NEPHRON).

Interventions

DRUGCombination Product: FDC of spironolactone and ER torsemide

The usual starting torsemide daily dose ranges from 5-10 mg (for hypertension) to 10-20 mg (for heart failure). The initial dose for treatment of heart failure or hypertension is 25 mg daily.

DRUGCombination Product: Stabilized doses of loop diuretic and finerenone

Treatment will be up to 80 mg furosemide or equivalent doses of other loop diuretics and 10 mg finerenone

Sponsors

Sarfez Pharmaceuticals, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Intervention model description

Randomized, prospective, open label, blinded endpoints

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

1. Adult male and female patients aged ≥18 years; 2. Are diagnosed with a CKD; 3. Have an eGFR of ≥25 and ≤60 mL/min/1.72 m2; 4. Have an UACR 150-3500 mg/g and Sk 4.5 to 5.0 mmol/L; 5. Have an observed clinic seated systolic blood pressure (SBP) of ≥130 and ≤170 mmHg; 6. Are receiving up to an 80 mg daily dose of furosemide or an equivalent dose of other loop diuretics and and 10 mg daily dose of finerenone for 30 days; 7. Willing and able to comply with all aspects of the protocol and to provide written informed consent from the patient or patient's legally acceptable representative (LAR); 8. Willing to use effective methods of contraception during sexual intercourse with an opposite sex throughout the study.

Exclusion criteria

1. Have a diagnosis of type I diabetes mellitus (T1DM); 2. Have uncontrolled hypertension (SBP \>170 mmHg); 3. Have primary aldosteronism or endocrine disorders; 4. Have serum potassium \>5.0 or \<4.5 mmol/L at screening; 5. Unable to continue on 10 mg finerenone or require daily dose of more than 80mg furosemide or equivalent doses of other loop diuretics 6. Have a recent diagnosis of acute kidney injury (≤3 months); 7. Had a cardiovascular event within 3 months prior to screening (e.g., myocardial infarction, stroke, transient ischemic attack, pulmonary embolism, elective coronary artery bypass grafting) or elective percutaneous coronary intervention within 1 month prior to screening; 8. Had hospitalized for worsening heart failure in last 30 days; 9. Have an autosomal dominant or recessive polycystic kidney disease; 10. Have an Addison's disease; 11. Have Hepatic insufficiency classified as Child-Pugh; 12. Have a diagnosis of Lupus nephritis or anti-neutrophil cytoplasmic autoantibody (ANCA)-associated vasculitis or any other kidney diseases requiring immunosuppressive therapy; 13. Have a history of organ transplant; 14. Require treatment with potassium-sparing diuretics; 15. Have an active malignancy; 16. Currently taking potassium supplement or potassium binders; 17. Have known hypersensitivity to sulfonamides or related compounds or spironolactone or finerenone; 18. Is pregnant, breastfeeding, or planning to become pregnant during the study; 19. Have participated in another clinical study involving any investigational drug within 30 days prior to Screening; 20. Is considered to be unsuitable for any other reason that may either place the patient at increased risk during participation or interfere with the interpretation of the study outcomes by the Investigator, after reviewing medical and psychiatric history, physical examination, and laboratory evaluation.

Design outcomes

Primary

MeasureTime frameDescription
Comparing Net Clinical Benefit (NBC) of the FDC to finerenone with SBP reduction12 weeksSBP ≥10 mmHg reduction from baseline (binary: yes/no).
Comparing Net Clinical Benefit (NBC) of the FDC to finerenone with UACR reduction12 weeksNCB is defined as UACR ≥30% reduction from baseline (binary: yes/no).
Comparing Net Clinical Benefit (NBC) of the FDC to finerenone with Serum K⁺ reduction12 weeksSerum K⁺ ≤5.0 mmol/L at end of treatment (binary: y/no)

Countries

United States

Contacts

CONTACTSalim Shah, PhD, JD
info@sarfez.com877-872-7339
CONTACTSophia Shah, MD
Sophia.Shah@sarfez.com877-872-7339
STUDY_DIRECTORChris Wilcox, MD, PhD

Sarfez Pharmaceuticals, Inc.

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 10, 2026