HSK-44459

This study is open to adults with idiopathic pulmonary fibrosis who are at least 40 years old. The main objective is to evaluate of the efficacy and the secondary objective is to evaluate the safety and pharmacokinetic.

This is a Phase I, randomized, subject-blinded, placebo controlled study to assess the safety, tolerability, pharmacokinetic (PK), pharmacodynamic (PD),and food effect (FE) of HSK44459 following (1) a single ascending dose (part 1), (2) 10 days of multiple ascending dose (part 2), and (3) a single dose two-period crossover FE cohort.