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nedosiran

Phase 3FDA approved

Primary Hyperoxaluria | RNA therapy | Rare Disease |Novo Nordisk A/S|Trials Updated: Oct 8, 2026

nedosiran development status

FDA approval on record Sep 29, 2023 as Rivfloza
Approval holderNovo
ApplicationNDA215842
Highest phase Phase 3 (NCT04042402)
Phase scored for NVOPhase 2
Registered trials 7 across 2 sponsors since Jan 2018

Label indication RIVFLOZA is indicated to lower urinary oxalate levels in children 2 years of age and older and adults with primary hyperoxaluria type 1 (PH1) and relatively preserved kidney function, e.g., eGFR ≥30 mL/min/1.73 m 2 [see Clinical Pharmacology (‎ 12.3 )], Clinical Studies (‎ 14.1 )]. FDA label

nedosiran target and mechanism

Target class-Siran (Sirna)
ModalityRNA therapy

Also known as DCR-PHXC

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDDMC
Total Trials6
Total Enrollment214

FDA Designations

No designations recorded

nedosiran clinical trials

nedosiran · 6 trials · 11 indications

Phase 3 1Phase 2 3Phase 1 2
NCT04042402Long Term Extension Study in Patients With Primary HyperoxaluriaPrimary Hyperoxaluria Type 1 (PH1)
ACTIVE NOT_RECRUITING75 Analytics
PHASE3ACTIVE NOT_RECRUITING
Long Term Extension Study in Patients With Primary Hyperoxaluria
Primary Hyperoxaluria Type 1 (PH1)Unlock trial analytics

Study Endpoints

Primary Endpoints

The annual rate of decline in eGFR in participants with PH1
Annual change from baseline

To evaluate the effect of DCR PHXC on estimated glomerular filtration rate (eGFR) in participants with PH1

Percent Change From Baseline to Month 6 in Spot Urinary Oxalate-to-creatinine Ratio in PH1, PH2, or PH3 Participant Subgroups
Baseline (Week 0), Month 6

This outcome measure reported percent change from baseline to Month 6 in spot urinary oxalate-to-creatinine ratio in pediatric participants (birth to 11 years of age) with genetically confirmed primary hyperoxaluria type 1 (PH1), primary hyperoxaluria type 2 (PH2), or primary hyperoxaluria type 3 (PH3) subgroups.

Absolute Change From Baseline to Month 6 in Spot Urinary Oxalate-to-creatinine Ratio in PH1, PH2, or PH3 Participant Subgroups
Baseline (Week 0), Month 6

This outcome measure reported absolute change from baseline to Month 6 in spot urinary oxalate-to-creatinine ratio in pediatric participants (birth to 11 years of age) with genetically confirmed PH1, PH2, or PH3 subgroups.

Safety: Incidence of Events
180 days

To assess the efficacy of DCR-PHXC in lowering Pox in participants with PH1 and severe renal impairment, with or without hemodialysis or peritoneal dialysis.

AUC From Day 90 To Day 180, Based on Percent Change From Baseline in 24-Hour Uox
From Day 90 to 180

The AUC of 24-hour urinary oxalate (Uox) from Day 90 to Day 180, based on percent change from baseline, was compared between the active treatment group and placebo group. A multiple imputation approach was used to handle missing Uox data and then calculate the AUC.

Safety profile of a single dose of DCR-PHXC in PH3 Patients
Screening through Day 85

Number of patients with abnormalities in clinically significant laboratory results, vital signs, and 12-lead ECG findings

Number of patients with Treatment-Related Adverse Events (TEAEs)
Part A (SAD in HVs) screening through Day 29; Part B (SAD in PH patients) screening through Day 57

Secondary Endpoints

The incidence and severity of treatment-emergent adverse events (TEAE) and SAEs associated with abnormal 12 lead electrocardiogram (ECG) readings
TEAEs and SAEs are evaluated monthly for 6 years
The incidence and severity of treatment-emergent adverse events (TEAE) and SAEs associated with abnormal physical examination findings
TEAEs and SAEs are evaluated monthly for 6 years
The incidence and severity of treatment-emergent adverse events (TEAE) and SAEs associated with abnormal vital signs
TEAEs and SAEs are evaluated monthly for 6 years
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Open LabelEXPERIMENTALOpen label, monthly subcutaneous injection
Open-Label DCR-PHXCEXPERIMENTALOpen-Label monthly subcutaneous injection of DCR-PHXC based on age and weight.
DCR-PHXCEXPERIMENTALIntervention, drug, DCR-PHXC
Placebo - Sterile Normal Saline (0.9% NaCl)PLACEBO_COMPARATORPlacebo, sterile normal saline (0.9% NaCl) for subcutaneous (SC) injection
Sterile Normal Saline (0.9% NaCl)PLACEBO_COMPARATORParticipants will receive a single dose of Sterile Normal Saline (0.9% NaCl) for subcutaneous (SC) injection, administered at same injection volume as DCR-PHXC, to serve as placebo.
Group A Active (DCR-PHXC)EXPERIMENTALHVs, single ascending doses of DCR-PHXC.
Group A PlaceboPLACEBO_COMPARATORHVs, normal saline 0.9% injection to match active doses.
Group B Active (DCR-PHXC)EXPERIMENTALPH1 and PH2 patients, open label, single ascending doses of DCR-PHXC.

Interventions

NameTypeDescription
DCR-PHXCDRUGMultiple fixed doses of DCR-PHXC by subcutaneous (SC) injection
nedosiranDRUGMonthly subcutaneous dosing throughout study period
Sterile Normal Saline (0.9% NaCl)DRUGSterile Normal Saline (0.9% NaCl) for subcutaneous (SC) injection, administered at same injection volume as DCR-PHXC, to serve as placebo
PlaceboDRUGSingle SC administration of placebo, which will be a sterile, preservative-free normal saline 0.9% solution for SC injection, which is of similar osmolality to the DCR-PHXC formulation.
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Eligibility Criteria

Age RangeN/A to 11 Years
SexALL
Healthy VolunteersNo
Study Sites23

Key Inclusion Criteria: •Participant successfully completed a Dicerna Pharmaceuticals, Inc. study of DCR PHXC. OR Participant is the sibling of a participant who successfully completed a Dicerna Pharmaceuticals, Inc. study of DCR PHXC. Siblings must be younger than 18 years of age and must have ge...

Countries:United StatesAustraliaCanadaFranceGermanyItalyJapanLebanonNetherlandsNorwaySpainTurkey (Türkiye)United KingdomPolandUnited Arab EmiratesMoroccoRomaniaIsraelNew Zealand
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Recent Changes (Last 90 Days)

LOWOct 8, 2026NCT04042402lastUpdatePostDate: changed
LOWOct 8, 2026NCT04042402lastUpdatePostDate: changed

Frequently asked questions about nedosiran

What is nedosiran used for?

Nedosiran is being developed for the treatment of primary hyperoxaluria, a rare inherited disorder. It is an investigational RNA therapy studied in pediatric patients from birth to 11 years of age with primary hyperoxaluria and relatively intact renal function. It has not been approved by the FDA.

How does nedosiran work?

Nedosiran is a small interfering RNA (siRNA) therapy, part of the -siran drug class. siRNA therapies are designed to reduce production of specific proteins by interfering with messenger RNA. The specific molecular target of nedosiran is not stated in the available information.

Who is developing nedosiran?

Nedosiran is being developed by Novo Nordisk A/S, which trades under the ticker NVO. Novo Nordisk is the company responsible for the clinical development program for this investigational RNA therapy in primary hyperoxaluria.

What phase is nedosiran in?

Nedosiran is in Phase 2 clinical development. It is an investigational therapy and has not been approved by the FDA. The Phase 2 trial has been completed, and no active trials are currently listed for nedosiran.

What clinical trials is nedosiran in?

Nedosiran has been studied in one completed Phase 2 clinical trial, NCT05001269, titled "Nedosiran in Pediatric Patients From Birth to 11 Years of Age With PH and Relatively Intact Renal Function." The trial enrolled 27 participants across the United States, Canada, Germany, Italy, Japan, Lebanon, Poland, Spain, Turkey, the United Arab Emirates, and the United Kingdom.