The goal of this clinical trial is to evaluate the tolerability, pharmacokinetics and pharmacodynamics of Ethoximod in healthy subjects. The main questions it arms to answer are:
1. to evaluate the safety and tolerance of Ethoximod in healthy subjects after single or repeated doses.
2. to assess the pharmacokinetics and pharmacodynamics of Ethoximod in healthy subjects after single or repeated doses.
3. to evaluate of the effect of food on the pharmacokinetics of Ethoximod in healthy subjects Participants will receive test tablets or placebo at the indicated date and collect blood samples.