Acotiamide vs Itopride in Postprandial Distress Syndrome

Investigator is aiming to conduct an Open-label, comparative randomized controlled, parallel, two-arms, multi-center study. Primary Outcomes: • Difference in overall treatment effect between both groups by using Leuven Postprandial Distress Scale (LPDS) in 8 weeks from the baseline Secondary Outcomes: * Difference between both groups in symptoms of Postprandial Distress Syndrome (PDS) (including early satiety, abdominal bloating, postprandial fullness) by using Leuven Postprandial Distress Scale (LPDS) * Difference between both groups in quality of life by using short form Nepean Dyspepsia Index (SF-NDI) from baseline * Frequency of adverse events, serious adverse events and tolerability in both groups