A total of 48 healthy subjects will be allocated to 1 of 6 cohorts (cohort A1~A6) in the SAD study, each cohort including 8 subjects (6 subjects will receive investigational new drug (IND) product and 2 receive placebo). Each subject in fasted state will be randomly assigned to receive a single oral dose of CS0159 or placebo.To ensure the safety for all SAD cohorts (including A3 in both treatment periods).~The MAD study will enroll 32 healthy subjects, allocated to 1 of 4 cohorts (cohort B1~B4) and each cohort including 8 participants (6 subjects will receive IND products and 2 receive placebo). Subjects will be randomly assigned to orally receive the IND product or placebo.
The whole study includes 2 parts. Both the SAD study and MAD study are randomized, double-blinded, and placebo-controlled studies, conducted in healthy subjects, to assess the safety, tolerability, pharmacokinetics, and pharmacodynamics profiles of CS0159. The SAD part also involves a pilot food effect (FE) study, designed to assess the food effect on single-dose PK profile in healthy subjects.