A Placebo-controlled Study to Investigate the Safety, and Pharmacokinetics of Oral GSK626616AC in Healthy Subjects

Inclusion Criteria: * Age 18 to 55 years healthy subjects * Hemoglobin values of 13.5-17.0 g/dL for males or 12.0-15.5 g/dL for females. * Females cannot be pregnant. Exclusion Criteria: * Cannot have exposure to greater than 4 new chemical entities within 12 months. * Cannot have a clinical history of current alcohol, or illicit drug use which, in the judgment of the Investigator, would interfere with the subject's ability to comply with the dosing schedule. * Cannot have a history of regular use of tobacco- or nicotine-containing products within 3 months. * Must not have received a blood transfusion or had a donation of blood within 3 months prior to study entry. * Cannot use be taking prescription, non-prescription or illicit drugs.