Functional dyspepsia will be considered according to the Rome III. Criteria. It will include Epigastric pain Syndrome defined as located pain or burning in the upper abdomen, at least once a week, intermittent, not generalized, not relieved by defecation and without criteria of gall bladder or sphincter of Oddi pathology; and Postprandial distress Syndrome defined as the presence of one or both conditions including nagging feeling of postprandial fullness after normal volume meals, several times a week and early satiety that prevents the completion of a regular meal, several times a week. The criteria must be present in the last three months and have started at least 6 months before diagnosis.