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Riliprubart

Phase 3

Chronic Inflammatory Demyelinating Polyneuropathy | Small molecule | Neurology |Sanofi|Trials Updated: Oct 19, 2026

Riliprubart development status

Highest phase Phase 3
Registered trials 3 across 2 sponsors since Mar 2021

Riliprubart target and mechanism

ModalitySmall molecule

Also known as Riliprubart Prefilled Pen (PFP), Riliprubart Prefilled Pen, SAR445088

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLEDDMC
Total Trials5
Total Enrollment679

FDA Designations

ORPHAN_DRUG

Riliprubart clinical trials

Riliprubart · 5 trials · 4 indications

Phase 3 3Phase 2 2
NCT06859099Long-term Safety and Efficacy Study of Riliprubart in Participants With CIDPPolyneuropathy, Inflammatory Demyelinating, Chronic
ENROLLING BY_INVITATION300 Analytics
NCT06290141A Study to Test the Efficacy and Safety of Riliprubart Against the Usual Treatment of Intravenous Immunoglobulin (IVIg) in People With Chronic Inflammatory Demyelinating Polyneuropathy (CIDP)Chronic Inflammatory Demyelinating Polyneuropathy
RECRUITING160 Analytics
NCT06290128A Study to Test the Effects and Safety of Riliprubart in People With Chronic Inflammatory Demyelinating Polyneuropathy (CIDP) for Which the Usual Treatments do Not WorkChronic Inflammatory Demyelinating Polyradiculoneuropathy
ACTIVE NOT_RECRUITING109 Analytics
PHASE3ENROLLING BY_INVITATION
Long-term Safety and Efficacy Study of Riliprubart in Participants With CIDP
Polyneuropathy, Inflammatory Demyelinating, ChronicUnlock trial analytics
PHASE3RECRUITING
A Study to Test the Efficacy and Safety of Riliprubart Against the Usual Treatment of Intravenous Immunoglobulin (IVIg) in People With Chronic Inflammatory Demyelinating Polyneuropathy (CIDP)
Chronic Inflammatory Demyelinating PolyneuropathyUnlock trial analytics
PHASE3ACTIVE NOT_RECRUITING
A Study to Test the Effects and Safety of Riliprubart in People With Chronic Inflammatory Demyelinating Polyneuropathy (CIDP) for Which the Usual Treatments do Not Work
Chronic Inflammatory Demyelinating PolyradiculoneuropathyUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of participants having any AEs, SAEs, adverse events leading to treatment discontinuation, AESIs, and potentially clinically significant abnormalities (PCSAs) in safety laboratory tests, ECGs, and vital signs during the study period
Up to End of Study (approx. 4 years)

adverse events: AEs, serious adverse events: SAEs, adverse events of special interest: AESIs, electrocardiograms: ECGs

Percentage of participants experiencing a response
Baseline to week 24

A response is defined as decrease of ≥1 point from baseline in adjusted INCAT disability score at Week 24

Percentage of participants randomized to riliprubart who responded during part A and had a lasting response during the open-label treatment extension period
Baseline to week 48

Lasting response is defined as a decrease of ≥1 point in adjusted INCAT disability score

Percentage of participants randomized to riliprubart with lasting response
Baseline to week 48

Lasting response is defined as a decrease of ≥1 point in adjusted INCAT disability score at week 48 versus baseline.

Percentage of participants randomized to placebo who experience a response
Week 24 to week 48

A response is defined as a decrease of ≥1 point in adjusted INCAT disability score at Week 48 versus week 24.

Part A, SOC-Treated: Percentage of participants relapsing after withdrawal of SOC and during the SAR445088 treatment period
Day 1 up to 24 weeks

Relapse will be defined as ≥1-point increase in adjusted Inflammatory neuropathy cause and treatment (INCAT) disability score. The Investigator/rater will evaluate the level of impairment in participants? arms and legs each on a scale of 0 (least impaired) to 5 (most impaired), in the context of a neurological examination, and will record the added scores (range 0 to 10) per the INCAT reporting instructions. A low score reflects no or minimal disability eg, no arm dysfunction or walking normally, whereas higher scores indicate more disability eg, wheelchair bound or no purposeful arm movement.

Part A, SOC-Refractory (initial and low dose group) and SOC-Naive: Percentage of participants responding during the SAR445088 treatment period
Day 1 up to 24 weeks

Response will be defined as ≥1-point decrease in adjusted INCAT disability score. The Investigator/rater will evaluate the level of impairment in participants? arms and legs each on a scale of 0 (least impaired) to 5 (most impaired), in the context of a neurological examination, and will record the added scores (range 0 to 10) per the INCAT reporting instructions. A low score reflects no or minimal disability eg, no arm dysfunction or walking normally, whereas higher scores indicate more disability eg, wheelchair bound or no purposeful arm movement.

Part B: Number of participants reported with adverse events
Day 1 up to Week 98

Number of participants reported with adverse events during 76 weeks of treatment and 22 weeks of follow-up.

Percentage of Participants With a Durable Platelet Response
From Week 3 to Week 24

A naive participant was a participant who did not use sutimlimab prior to enrollment. A switcher was a participant who used sutimlimab prior to enrollment. A naive participant was a responder if the platelet count was \>=50 × 10\^9/liter (L) at \>=50 percent (%) of scheduled visits, or for participants with baseline platelet count \<15 × 10\^9/L, a \>=20 × 10\^9/L increase in platelet count from baseline at \>=50% of scheduled visits, without receiving rescue immune thrombocytopenia (ITP) therapy. A switcher was a responder if the maintenance platelet count was \>=30 × 10\^9/L at \>=50% of scheduled visits, without receiving rescue ITP therapy.

Secondary Endpoints

Percentage of participants relapse-free since the first dose of riliprubart in the parent study (PDY16744, EFC17236, or EFC18156)
From first dose of riliprubart in parent study to end of treatment (up to approx. 7 years)
Percentage of participants experiencing improvement from baseline
From Baseline to 3 years
Change from baseline in adjusted Inflammatory Neuropathy Cause and Treatment (INCAT) disability score over time
From Baseline to 3 years
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
riliprubartEXPERIMENTALParticipants receive subcutaneous injection with a riliprubart prefilled pen (PFP)
Riliprubart ArmEXPERIMENTALRiliprubart + Placebo IVIg for 24 weeks followed by open-label extension phase with riliprubart for 24 weeks
IVIg ArmACTIVE_COMPARATORIVIg (IVIg continuation) + Placebo riliprubart for 24 weeks followed by open-label extension phase with riliprubart for 24 weeks
Placebo ArmPLACEBO_COMPARATORPlacebo for 24 weeks followed by open-label extension phase with riliprubart for 24 weeks
SOC-Refractory Initial DoseEXPERIMENTALPart A: Eligible participants will receive SAR445088 for 24 weeks. Participants who do not enroll into Part B will be asked to attend a final safety follow-up visit that will take place 22 weeks after Week 24 (approximately (\~)at Week 46). Part B: Participants who successfully complete Part A, will be reassessed for continuing eligibility and will be given the option of rolling into Part B, where they will continue receiving SAR445088 for an additional 52 weeks. At the end of the Part B treatment period, participants will be asked to attend a safety follow-up visit that will take place 22 weeks after the last SAR445088 dose (approximately week 98) if they will not continue in Part C. Part C: Participants from Part B who enter Part C will continue receiving SAR445088 until the end of study. Participants who discontinue at any time during Part C will be asked to attend a safety follow-up visit that will take place 22 weeks after the last SAR445088 dose.
SOC-Refractory Low DoseEXPERIMENTALPart A: Eligible participants will receive SAR445088 for 24 weeks. Participants who do not enroll into Part B will be asked to attend a final safety follow-up visit that will take place 22 weeks after Week 24 (approximately at Week 46). Part B: Participants who successfully complete Part A, will be reassessed for continued eligibility and will be given the option to roll into Part B, where they will continue receiving SAR445088 for an additional 52 weeks. At the end of the Part B treatment period, participants will be asked to attend a safety follow-up visit that will take place 22 weeks after the last SAR445088 dose (approximately week 98) if they do not continue in Part C. Part C: Participants from Part B who enter Part C will continue receiving SAR445088 until the end of study. Participants who discontinue at any time during Part C will be asked to attend a safety follow-up visit that will take place 22 weeks after the last SAR445088 dose.
SOC-Treated Initial DoseEXPERIMENTALPart A: Eligible participants will receive SAR445088 for 24 weeks. Weeks 1-12 (overlap period): Participants will be given SAR445088 with superimposing effects of SOC therapy; Weeks 13-24: SAR445088 given. Participants who do not enroll into Part B will attend final safety follow-up visit at 22 weeks after Week 24 (\~Week 46). Part B: Participants who successfully complete Part A, will be reassessed for continuing eligibility and will be given option of rolling into Part B, and continue receiving SAR445088 for 52 weeks. At the end of the Part B treatment period, participants will be asked to attend a safety follow-up visit that will take place 22 weeks after the last SAR445088 dose (\~week 98) if they do not continue in Part C. Part C: Participants from Part B who enter Part C will continue receiving SAR445088 until end of study. Participants who discontinue at any time during Part C will be asked to attend a safety follow-up visit at 22 weeks after the last SAR445088 dose.
SOC-NaiveEXPERIMENTALPart A: Eligible participants will receive SAR445088 for 24 weeks. Participants who do not enroll into Part B will be asked to attend a final safety follow-up visit that will take place 22 weeks after Week 24 (approximately at Week 46). Part B: Participants who successfully complete Part A, will be reassessed for continuing eligibility and will be given the option of rolling into Part B, where they will continue receiving SAR445088 for an additional 52 weeks. At the end of the Part B treatment period, participants will be asked to attend a safety follow-up visit that will take place 22 weeks after last SAR445088 dose (approximately week 98) if they do not continue in Part C. Part C: Participants from Part B who enter Part C will continue receiving SAR445088 until the end of study. Participants who discontinue at any time during Part C will be asked to attend a safety follow-up visit that will take place 22 weeks after last SAR445088 dose.
SOC-Treated Low DoseEXPERIMENTALPart A: Eligible participants will receive SAR445088 for 24 weeks. Weeks 1-12 (overlap period): Participants will be given SAR445088 with superimposing effects SOC therapy; Weeks 13-24: SAR445088. Participants who do not enroll into Part B will attend a final safety follow-up visit that will take place 22 weeks after Week 24 (\~Week 46). Part B: Participants who successfully complete Part A, will be reassessed for continued eligibility, will be given the option of rolling into Part B, and continue receiving SAR445088 for 52 weeks. At the end of the Part B treatment period, participants will attend a safety follow-up visit that will take place 22 weeks after the last SAR445088 dose (\~week 98) if they do not continue in Part C. Part C: Participants from Part B who enter Part C will continue receiving SAR445088 until end of study. Participants who discontinue at any time in Part C will attend a safety follow-up visit that will take place 22 weeks after the last SAR445088 dose.
SAR445088EXPERIMENTALParticipants received SAR445088 (BIVV020).

Interventions

NameTypeDescription
Riliprubart Prefilled Pen (PFP)DRUGPharmaceutical form: Solution Route of administration: Subcutaneous injection
riliprubartDRUGPharmaceutical form: Solution Route of administration: IV solution
PlaceboDRUGPharmaceutical form: Solution Route of administration: IV solution
IVIgDRUGPharmaceutical form: Concentrate for solution for infusion (or any other formulation approved locally) Route of administration: IV solution
SAR445088 (IV)DRUGPharmaceutical form: Solution for Injection Route of Administration: Intravenous (IV)
SAR445088 (SC)DRUGPharmaceutical form: Solution for Injection Route of Administration: Subcutaneous (SC)
SAR445088 (BIVV020)DRUGPharmaceutical form:solution for injection
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites62

Inclusion Criteria: Participants are eligible to be included in the study only if all of the following criteria apply: 1. Participants with chronic inflammatory demyelinating polyneuropathy (CIDP) currently receiving riliprubart who completed treatment in Part B of Study PDY16744, Study EFC17236, ...

Countries:United StatesArgentinaBrazilBulgariaCanadaChileChinaCzechiaDenmarkFranceGermanyItalyJapanMexicoNetherlandsPolandPortugalSerbiaSouth KoreaSpainSwedenTaiwanTurkey (Türkiye)United KingdomBelgiumGreeceHungaryIsraelNorwaySwitzerland
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Recent Changes (Last 90 Days)

LOWOct 19, 2026NCT06290141lastUpdatePostDate: changed
LOWOct 19, 2026NCT06290141lastUpdatePostDate: changed
LOWSep 30, 2026NCT06859099lastUpdatePostDate: changed
LOWSep 30, 2026NCT06859099lastUpdatePostDate: changed
LOWSep 22, 2026NCT06290141lastUpdatePostDate: changed
LOWSep 22, 2026NCT06290141lastUpdatePostDate: changed
LOWSep 21, 2026NCT06859099lastUpdatePostDate: changed
LOWSep 21, 2026NCT06859099lastUpdatePostDate: changed
LOWSep 19, 2026NCT06859099lastUpdatePostDate: changed
LOWSep 19, 2026NCT06859099lastUpdatePostDate: changed
LOWSep 19, 2026NCT06859099lastUpdatePostDate: changed
LOWAug 26, 2026NCT06290141lastUpdatePostDate: changed
LOWAug 26, 2026NCT06290141lastUpdatePostDate: changed
HIGHAug 11, 2026NCT06290128Status: RECRUITING → ACTIVE_NOT_RECRUITING
HIGHAug 11, 2026NCT06290128Status: RECRUITING → ACTIVE_NOT_RECRUITING
HIGHAug 11, 2026NCT06290128Status: RECRUITING → ACTIVE_NOT_RECRUITING
LOWJul 29, 2026NCT06290141lastUpdatePostDate: changed
LOWJul 29, 2026NCT06290141lastUpdatePostDate: changed

Frequently asked questions about Riliprubart

What is Riliprubart?

Riliprubart is an investigational small molecule being developed by Sanofi for chronic inflammatory demyelinating polyneuropathy, or CIDP. It is in Phase 3 clinical development and has received an orphan drug designation from the FDA. It is not yet approved for any indication.

What is Riliprubart used for in CIDP?

Riliprubart is being studied for the treatment of chronic inflammatory demyelinating polyneuropathy, a neurological condition affecting peripheral nerves. The clinical program includes patients who have not responded to usual treatments as well as those receiving standard therapy such as intravenous immunoglobulin.

Who makes Riliprubart?

Riliprubart is developed by Sanofi, which trades under the ticker SNY. Sanofi is running the Phase 3 clinical program for the drug in chronic inflammatory demyelinating polyneuropathy across multiple countries worldwide.

What phase is Riliprubart in?

Riliprubart is in Phase 3 clinical development. Two active Phase 3 trials are ongoing, and a third Phase 3 study is active but not recruiting. The drug is investigational and has not been approved by the FDA.

What clinical trials is Riliprubart in?

Riliprubart is being evaluated in three Phase 3 trials: NCT06290141, which compares it with intravenous immunoglobulin in CIDP; NCT06290128, which studies patients for whom usual treatments do not work; and NCT06859099, a long-term safety and efficacy study. All are randomized, double-blind, and active-controlled.

Is Riliprubart the same as Riliprubart Prefilled Pen?

Yes. Riliprubart Prefilled Pen, sometimes abbreviated PFP, is an alternative name for riliprubart. Both refer to the same Sanofi investigational drug being studied in Phase 3 trials for chronic inflammatory demyelinating polyneuropathy.