An Exploratory Study Examining The Effects Of Taking GW679769 Once-Daily For 4 Days In Patients With Functional Dyspepsia

Inclusion criteria: * Functional dyspepsia as diagnosed according to the Rome II criteria * Must had a one month trial (full dose) of proton pump inhibitor treatment within the last 6 months, during a symptomatic period, that produced no lasting response, although this may not be required for those patients who have no symptoms of heartburn and do not present pain-predominant dyspepsia symptoms. Such decision will be left to the Principal Investigator's discretion. * Patients who are non-smokers or smokers who smoke up to 20 cigarettes per day Exclusion criteria: * Active or history of peptic ulcer disorder * History of major abdominal surgery * History of underlying psychiatric illness, or current active psychiatric morbidity * Pregnant or nursing women