A Randomized, Double-blind, Placebo-controlled Study of the Safety, Tolerability and Pharmacokinetics of Ascending Single and 14-day Repeated Oral Doses of SAR443820 in Healthy Adult Participants.

Study Purpose:

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).

Study Status:

Not recruiting


Amyotrophic Lateral Sclerosis (Healthy Volunteers)

Study Type:


Type of Intervention:


Intervention Name:

SAR443820, Placebo




Phase 1

Study Chair(s)/Principal Investigator(s):

Trial Transparency email recommended (Toll free for US & Canada), Sanofi, Clinical Sciences & Operations, Sanofi

Clinicaltrials.gov ID:


Neals Affiliated?


Coordinating Center Contact Information

Full Study Summary:

The duration of the study for a participant will include:

Screening Period: up to 28 days

Part 1a:

Treatment in fasted condition: 1 day (Day 1). Study observation Period from Day -2/Day -1 to Day 3. Follow-up with the end of study: from Day 5 to Day 7. Total duration from screening per participant: up to 5 weeks.

Part 1b:

Treatment in fed condition: 1 day (Day 1). Study observation Period from Day -1/Day1 to Day 2. Follow-up with the end of study: from Day 5 to Day 7. Total duration from screening per participant: up to 5 weeks.

Part 2:

Treatment: 14 days (Day 1 to Day 14). Study observation Period from Day -2/Day -1 to Day 17. Follow-up with the end of study: from Day 19 to Day 21. Total duration from screening per participant: up to 7 weeks.

Study Sponsor:


Estimated Enrollment:


Estimated Study Start Date:

11 / 30 / 2020

Estimated Study Completion Date:

07 / 20 / 2021

Posting Last Modified Date:

04 / 03 / 2023

Date Study Added to neals.org:

04 / 03 / 2023

Accepts healthy volunteers:


Minimum Age:

18 Years

Maximum Age:

55 Years

Inclusion Criteria:

Male and/or female participant, between 18 and 55 years of age, inclusive. Body weight between 50.0 and 100.0 kg, inclusive, if male, and between 40.0 and 90.0 kg, inclusive, if female, body mass index between 18.0 and 30.0 kg/m2, inclusive.

Certified as healthy by a comprehensive clinical assessment (detailed medical history and complete physical examination).

Having given written informed consent prior to undertaking any study-related procedure.

Not under any administrative or legal supervision or under institutionalization due to regulatory or juridical order.

Exclusion Criteria:

Any history or presence of clinically relevant cardiovascular, pulmonary, gastrointestinal, hepatic, renal, metabolic, hematological, neurological, osteo-muscular, articular, psychiatric, systemic, ocular, gynecologic (if female), or infectious disease, or signs of acute illness.

Personal medical history of seizure.

Frequent headaches and/or migraine, recurrent nausea and/or vomiting (for vomiting only: more than twice a month).

Any medication (including St John's Wort) within 14 days before inclusion or within 5 times the elimination half-life or pharmacodynamic half-life of the medication, with the exception of hormonal contraception or menopausal hormone replacement therapy; any vaccination within the last 28 days and any biologics (antibody or its derivatives) given within 4 months before inclusion.

Positive result for hepatitis B, C or HIV

Positive result on urine drug screen

Positive alcohol test.

Any consumption of citrus fruits or their juices within 5 days before inclusion.

Current psychiatric disorder, suicidal ideation in the previous 6 months (as assessed by the C-SSRS), or a lifetime suicide attempt.

Additional exclusion criteria applied, and specially for Part 1b, criteria related to the study procedure of lumbar puncture.

The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.

Prism Research-Site Number:8400001

Saint Paul, Minnesota 55144
United States