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Last Updated: April 2, 2026

CLINICAL TRIALS PROFILE FOR SAR443820


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Clinical Trials for SAR443820

Trial ID Title Status Sponsor Phase Summary
NCT04982991 ↗ Single Ascending Dose Study of SAR443820 in Healthy Adult Chinese and Japanese Female and Male Participants Completed Sanofi Phase 1 Primary Objective: To assess the pharmacokinetic parameters of SAR443820 after ascending single oral doses in healthy East Asian (Chinese and Japanese) adult participants. Secondary Objective: To assess the tolerability and safety of SAR443820 after ascending single oral doses in healthy East Asian (Chinese and Japanese) adult participants
NCT05237284 ↗ Phase 2 Study for SAR443820 in Participants With Amyotrophic Lateral Sclerosis (ALS) Not yet recruiting Sanofi Phase 2 This is a parallel treatment, Phase 2, randomized, double-blind study to assess the efficacy, safety, tolerability, PK, and PD of twice daily (BID) oral SAR443820 compared with placebo in male and female participants,18 to 80 years of age with ALS followed by an openlabel, longterm extension period. Study ACT16970 consists of 2 parts (A and B) as follows: Part A is a 24 week, double blind, placebo controlled part, preceded by a screening period of up to 4 weeks before Day 1. On Day 1 of Part A, participants will be randomized in a 2:1 ratio to the SAR443820 treatment arm or matching placebo arm as listed below: Treatment arm: SAR443820, BID Placebo arm: Placebo, BID Randomization will be stratified by the geographic region of the study site, region of ALS onset (bulbar vs other areas), use of riluzole (yes vs no), and use of edaravone (yes vs no). Participants will attend inclinic study assessments at baseline (Day 1), Week 2, Week 4, Week 8, Week 16, and Week 24, and will receive a phone call at Week 12 and Week 20. After successful completion of Part A, all participants will rollover to Part B. The Week 24 Visit is the end of Part A and the beginning of Part B. Part B is an open label, longterm extension period that starts from the end of Part A (Week 24) and continues up to Week 106. The objectives of Part B are to further determine the safety and efficacy of longterm SAR443820 treatment. The treatment assignment of participants in Part A will remain blinded to Investigators, participants, and site personnel until the end of Part B. Every participant will receive BID oral tablets of SAR443820 in Part B.
NCT05630547 ↗ A Study to Evaluate the Effect of SAR443820 on Serum Neurofilament Levels in Male and Female Adult Participants With Multiple Sclerosis Not yet recruiting Sanofi Phase 2 This is a Phase 2, randomized, double-blind, placebo-controlled 2 parallel-arm study to assess the effect on serum neurofilament light chain (sNfL), safety and tolerability of oral SAR443820 compared to placebo in male and female participants aged 18 to 60 years with relapsing-remitting multiple sclerosis (RRMS), secondary progressive multiple sclerosis (SPMS) (relapsing or non-relapsing), or primary progressive multiple sclerosis (PPMS) followed by an open-label long-term extension period. The total study duration is approximately 100 weeks and includes the following: 4-week screening period 48-week double-blind treatment period (Part A) 48-week open-label long-term extension period (Part B)
NCT05795907 ↗ Single & Multiple Ascending Dose Study of SAR443820 in Healthy Adult Participants Completed Sanofi Phase 1 This is a Phase 1, single-center study conducted in 2 parts: Part 1a, single ascending dose (SAD-TDU16519): Double-blind, randomized, placebo-controlled sequential ascending single oral doses including up to 6 cohorts. Each cohort will include 8 participants (6 receiving SAR443820 and 2 placebo). Part 1b (TDU16519): - Open label, single SAR443820 dose in one or two separated cohort(s) for SAR443820 measurements in CSF and in plasma. Part 2, multiple ascending dose (MAD -TDR16520): Double-blind, randomized, placebo-controlled, sequential ascending repeated oral doses for 14 days, including up to 4 cohorts. Each cohort will include 10 participants (8 receiving SAR443820 and 2 placebo).
NCT05797701 ↗ A Study in Healthy Adult Male & Female Participants to Assess the Amount of the Study Medicine (SAR443820) Absorbed by the Body, When Given Orally in Fasted Condition as a Tablet Versus as a Capsule (Part 1) and When Given Orally as a Tablet in Fast Completed Sanofi Phase 1 Part 1: This is an open label, balanced randomized, single dose, 2-sequence, 2-period (period 1 and period 2), 2-treatment crossover (between Treatment A and Treatment B for Part 1), study part to determine the relative bioavailability of SAR443820 in tablet formulation versus capsule formulation under fasted conditions. Two treatments are as follows: - Treatment A: SAR443820 - tablet formulation in fasted condition - Treatment B: SAR443820 - capsule formulation in fasted condition Each administration will be a single dose of SAR443820 separated by a wash out of at least 5 days. Part 2: This is an open-label, balanced randomized, single dose, 2-sequence, 2-period (period 1 and period 2), 2-treatment crossover (between Treatment C and Treatment D for Part 2) study part to perform a preliminary assessment of the effect of a high-fat meal on pharmacokinetic parameters of single dose of SAR443820 in tablet formulation. Two treatments are as follows: - Treatment C: SAR443820 - tablet formulation in fasted condition - Treatment D: SAR443820 - tablet formulation in fed condition Each administration will be a single dose of SAR443820 separated by a wash out of at least 5 days. Participants are not allowed to participate in more than one part of the study. In both Parts 1 and 2, the assessment of pharmacokinetic, safety and tolerability are performed at each treatment period at baseline (prior single dosing) up to 48-hour postdosing in healthy adult male and female participants.
NCT05797753 ↗ A Study to Assess the Effect of Erythromycin on the Test Medicine (SAR443820) When Given Orally as Tablets to Healthy Adult Male and Female Participants (Part A); and the Effect of Itraconazole on the Test Medicine (SAR443820) When Given Orally as C Completed Sanofi Phase 1 This is a Phase 1, cross-over, 2-part study for pharmacokinetic (PK) assessment of SAR443820 when co-administered with cytochrome P450 3A4 (CYP3A4) inhibitors (erythromycin ethyl succinate (EES) in Part A and possibly itraconazole in Part B). In Part A, the objective is to assess the effects of repeated administration of EES as CYP3A4 inhibitor, on the PK profile of a single oral dose of SAR443820 tablet in healthy male and female participants. In Part B, the objective is to assess the effects of repeated administration of itraconazole on the PK profile of a single oral dose of SAR443820 capsule in healthy male participants. Part A includes a screening period, Period 1 (SAR443820), a wash-out period and Period 2 (SAR443820 + EES). Part B includes a screening period, Period 1 (SAR443820), a wash-out period and Period 2 (SAR443820 + itraconazole). The washout period between single SAR443820 administration in Period 1 and the start of dosing with EES (Part A) or itraconazole (Part B) in Period 2 is at least 4 days. The study duration is approximately 7 weeks for each Part A and Part B. The treatment duration is: - For SAR443820 (both Part A and Part B): 1 day in each Period; single dose of SAR443830 on Period 1 (P1)-Day 1 and on Period 2 (P2)-Day 6 for each Part. - For EES (Part A): 9 days of treatment in Period 2 with P2-Day 1 starting at least 4 days after P1-Day 1. - For itraconazole (Part B): the treatment duration lasts 11 days in Period 2 and it is fixed once the results of Part A are issued, P2-Day 1 starting at least 4 days after P1-Day 1.
>Trial ID >Title >Status >Phase >Summary

Clinical Trial Conditions for SAR443820

Condition Name

Condition Name
Intervention Trials
Amyotrophic Lateral Sclerosis (Healthy Volunteers) 3
Amyotrophic Lateral Sclerosis 1
Multiple Sclerosis 1
Multiple Sclerosis Healthy Subjects 1
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Condition MeSH

Condition MeSH
Intervention Trials
Amyotrophic Lateral Sclerosis 4
Motor Neuron Disease 4
Multiple Sclerosis 2
Sclerosis 2
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Clinical Trial Locations for SAR443820

Trials by Country

Trials by Country
Location Trials
United States 3
United Kingdom 1
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Trials by US State

Trials by US State
Location Trials
Minnesota 3
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Clinical Trial Progress for SAR443820

Clinical Trial Phase

Clinical Trial Phase
Clinical Trial Phase Trials
Phase 2 2
Phase 1 4
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Clinical Trial Status

Clinical Trial Status
Clinical Trial Phase Trials
Completed 4
Not yet recruiting 2
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Clinical Trial Sponsors for SAR443820

Sponsor Name

Sponsor Name
Sponsor Trials
Sanofi 6
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Sponsor Type

Sponsor Type
Sponsor Trials
Industry 6
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