Phase 2a Study of IW-9179 to Treat Functional Dyspepsia

Inclusion Criteria: * Patient meets ROME III criteria for functional dyspepsia (FD) * Patient has a normal esophagogastroduodenoscopy (EGD) either during the Screening Period or within 2 years of the Screening Visit * Patients who EITHER: 1. Have not used a proton pump inhibitor (PPI) within 4 weeks of the Screening Visit, OR 2. Have used a PPI at a stable dose for at least 4 weeks prior to the Screening Visit; * Patient meets symptom severity criteria in the Pretreatment Period * Patient is fluent and literate in Dutch, French, or English Exclusion Criteria: * Patient meets criteria for gastroesophageal reflux disease (GERD, stable regimen of PPIs acceptable), constipation, diarrhea, lower abdominal pain, or gastroparesis * Patient has a history of inflammatory bowel disease, chronic pancreatitis, small intestinal bacterial overgrowth, celiac disease, lactose intolerance, polycystic kidney disease, interstitial cystitis, or scleroderma * Any significant neurological disease or a history of cancer (resected basal cell or squamous cell carcinoma of the skin is acceptable; complete remission of other cancers for 5 years or longer is also acceptable) * History of active alcoholism or drug addiction within 12 months prior to the Screening Visit * Hospitalized for a psychiatric condition or has made a suicide attempt during the two years before the Screening Visit * Any organic or structural disease that can cause abdominal pain or discomfort