Phase1 Study of GR121167, Single and Multiple Dose Study in Healthy Japanese Males

This study is a randomized, double-blind, ascending dose, placebo-controlled, incomplete crossover, single and multiple dose study in healthy Japanese male subjects to assess the pharmacokinetics and safety/tolerability of single and multiple intravenous administration of GR121167. Serial blood samples and pooled urine samples for the determination of GR121167 concentration will be collected and safety assessments will be performed for each treatment period. The pharmacokinetics and dose proportionality of GR121167 after single intravenous administration of GR121167 at the dose levels of 100 mg, 300 mg and 600 mg will be assessed. In addition, in the final treatment period (600 mg), twice daily intravenous administrations for 5 days will be also conducted and the pharmacokinetics and accumulation will be assessed.