Functional dyspepsia is the most common form of dyspepsia met with in the GP's office and in routine internistic medicine. The symptoms are unspecific: Postprandial or early satiation, epigastric discomfort/pain. To establish the diagnosis, organic disorders must first be carefully excluded. To date, no pathophysiological explanation for such complaints is available, and treatment is purely symptomatic, for example, administration of a proton pump inhibitor or a prokinetic drug, or even psychotherapy.