This is an open-label study that will measure blood levels of different parts of a drug called GKS189075. People participating in this study will receive a single dose of 250mg GSK189075 by mouth. About 20 people with mild to moderate decrease in renal (kidney) function will be asked to participate in this study. They will be compared to about 20 healthy participants who are close to the same age and body size. People participating in this study will stay at a clinical research unit beginning 2 days before they receive their single dose of GSK189075 and will remain there until approximately one day after receiving the study drug. During this study urine will be collected beginning the day before receiving study drug until the day after, just prior to leaving the clinical research unit. Blood samples will also be collected at various times beginning immediately before until 24 hours after receiving the study drug.