In the SAD part of the study the investigational drug will be administered once in a dose escalation manner starting from 200 mg in Cohort 1 to 2000 mg in Cohort 6. The study drug will be orally taken as capsules. In the MAD part of the study the investigational drug will be administrated twice daily for 5 days depending on the half-life of FP-025, as determined in the SAD part of the study. Study subjects will be randomized in a 1:3 ratio to either placebo or FP-025 in every cohort of the SAD and MAD part of the study.