Study to Evaluate Darapladib in Moderately Hepatically Impaired Subjects

This study is an open-label, non-randomised study to assess the pharmacokinetics and safety/tolerability of repeat oral 40 mg doses of darapladib in subjects with moderate hepatic impairment (as defined by a Child-Pugh score of 7-9) in comparison to matched healthy volunteers. The hepatically impaired and healthy volunteer groups will receive repeat oral doses of darapladib for 10 consecutive days. The pharmacokinetics of darapladib and its metabolites will be evaluated. The effect of liver impairment on the plasma protein binding of darapladib and metabolites will also be determined as data permit. Safety will be assessed by clinical laboratory tests (hematology, chemistry and urinalysis), vital signs (blood pressure and heart rate measurements), 12-lead electrocardiograms (ECGs) and monitoring for adverse events (AEs). Subjects will be housed in the clinical unit from the evening before first dose until 24 hours after the final dose of 10 days of repeat dosing. A follow-up period will include 2 visits, one of which will be conducted approximately 10-14 days from the last dose of study drug and the second visit will be 35 days +/- one week after the last dose of study drug