A Study To See If GSK256073A Can Block Niacin-Induced Flushing In Healthy Volunteers

Inclusion Criteria: * Adult males between 18 and 55 years of age, inclusive. * Healthy subjects * Body weight \> 50 kg (110 pounds) and body mass index (BMI) between 19 and 31 where: * Subjects with QTc \< 450 msec at screening Exclusion Criteria: * History of significant cardiac arrhythmias * Active peptic ulcer disease (PUD) and/or history of PUD * History of gout and/or hyperuricemia * History of Gilbert's syndrome * History of recurrent indigestion, stomach upset or diarrhea * History of other than rare (once yearly or less) flushing * Recurrent skin rash or psoriasis * History of kidney stones