The present study will be conducted in two parts in healthy male volunteers. Part 1 will investigate the pharmacokinetics and tolerability of single doses of firategrast administered as the existing immediate release tablet formulation, as a modified release tablet (3hr) formulation and as a simulated gastro-retentive formulation to be administered via a naso-gastric tube. Subjects will receive each formulation in a randomised 3-way single dose crossover fashion.
Part 2, based on the review of safety, tolerability and pharmacokinetic data from the first two study treatment periods of Part 1, will investigate the pharmacokinetics and tolerability of multiple doses of firategrast administered as the existing immediate release tablet formulation, as a modified release tablet (3hr) formulation and as simulated gastro-retentive formulation to be administered via naso-gastric tube for a period of 7 days.
