This will be an open-label, randomized, single dose, two-way crossover study. Each subject will participate in both treatment periods and will receive single oral doses of candesartan cilexetil (GW615775) and reference candesartan cilexetil (ATACAND™); the treatment periods will be separated by a washout period of at least 7 days and no greater than 14 days. This study aims to determine the relative bioavailability of an 8mg test formulation tablet of candesartan cilexetil (GW615775) compared to an 8mg reference tablet of candesartan cilexetil in healthy adult subjects. ATACAND is a registered trademark of the AstraZeneca group of companies.