简介内容:R-1663 is a factor Xa inhibitor. R-1663 prolonged clotting times, inhibited thrombin generation (peak height and endogenous thrombin potential [ETP]) and anti-factor Xa activity in a concentration-dependent manner without increasing bleeding time. Pharmacodynamic parameters were strongly correlated to R-1663 plasma concentrations. The inhibition was more pronounced on peak height (IC?? = 194 ng/ml) than on ETP (2790 ng/ml).