The purpose of this study is to determine the safety, tolerability, and pharmacokinetics of multiple doses of SLx-2119 in healthy male participants.

Duration per participants is Day 1 up to 30 days after participant is treated with the last dose of study drug.

Inclusion Criteria:

• Healthy participants between the ages of 18 and 55 years, inclusive.
• Able to provide written informed consent prior to the performance of any study specific procedures.
• Body mass index (BMI) range of 19-30 kilogram per square meter (kg/m2), inclusive.

Exclusion Criteria:

• Participants are excluded from the study if any of the following criteria apply:
• Past or present disease that is judged by the investigator to have the potential to interfere with the study procedures, compromise safety, or affect the PK evaluations.
• Known sensitivity to Rho-associated coiled-coil containing serine/threonine protein kinases (ROCK2) inhibitor agents or to any of the constituents of the KD025 formulation.

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

Qualified researchers may request access to patient level data and related study documents including the clinical study report, study protocol with any amendments, blank case report form, statistical analysis plan, and dataset specifications. Patient level data will be anonymized and study documents will be redacted to protect the privacy of trial participants. Further details on Sanofi's data sharing criteria, eligible studies, and process for requesting access can be found at: https://vivli.org