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 a 16mg test formulation tablet of candesartan cilexetil (GW615775) compared to an 16mg reference tablet of candesartan cilexetil in healthy adult subjects. ATACAND is a registered trademark of the Astra/Zeneca group of companies.