Oral Nafamostat in Healthy Volunteers (NAF-101)

Subjects will undergo a medical screening (Days -1 to -10) and, if eligible, informed consent will be obtained prior to 6 days of confinement at the clinic site. Up to 20 subjects will be randomized. Subjects will be stratified to include an equal number of male and female subjects who will receive active drug within each dose cohort, and an equal number of male and female subjects in the combined placebo group. Separate groups of volunteers will be used for each dose cohort. There will be 4 dose cohorts in this study with active drug doses of 10, 50, 100, and 200 mg nafamostat in succeeding cohorts. Each cohort of 5 subjects will enroll 2 male and 2 female to receive active drug and 1 subject (male or female) to receive placebo for a total of 20 subjects. The placebo subject from each cohort will be combined into a placebo cohort that will have 4 subjects to compare to 4 subjects in each of the active dose groups.