This study adopts a multicenter, randomized, double-blind, low--high dose groups and placebo parallel controlled clinical study design. After screening, patients with active ulcerative colitis who meet the inclusion criteria and do not meet the exclusion criteria will be randomized by 1:1:1 to Hemay005 45 mg BID group, 60 mg BID group or placebo group, with proposed 36 patients in each group. All patients will enter a 12-week double-blind inductive treatment period. All randomized subjects who have received the investigational drug should be subjected to a 4-week observation after the end of treatment.
This study is a multicenter, randomized, double-blind study. There are three dosage groups: Hemay005 45 mg BID group, 60 mg BID group or placebo group, with 36 patients in each dosage group. All patients will enter a 12-week double-blind treatment period. All subjects who have received the investigational drug should be subjected to a 4-week observation after the end of treatment.