Traditional Chinese Medicine Xiang-sha-liu-jun Granules in Patients With Postprandial Distress Syndrome(PDS)

Inclusion Criteria: * i)Aging between 18 and 75 years, able to read and write Chinese; * ii)have a TCM diagnosis of spleen deficiency and qi stagnation pattern; * iii) Having normal esophagogastroduodenoscopy results within 6 months; * iv) Having normal liver and renal function confirmed by blood tests within 3 months; * v) Being diagnosed as PDS of FD by a specialist consultation; * vi）Receiving no other treatments during the study; * vii）Voluntarily agreeing with the study protocol and signing a written informed consent. Exclusion Criteria: * i)Having peptic ulcer or gastroesophageal reflux disease confirmed by esophagogastroduodenoscopy; * ii) Having obvious signs of irritable bowel syndrome; * iii) Having alarm symptoms (weight loss, black or tar stool, or dysphagia); * iv) Having serious structural disease (disease of heart, lung, liver or kidney) or mental illness; * v) Having had surgery related with the gastrointestinal tract, except for appendectomy more than six months ago; * vi) Pregnant or breastfeeding; * vii) Being taking drugs which may affect the gastrointestinal tract; a minimum wash-out period of two weeks is required before participating in the trial; * viii) Having a problem of malabsorption or maldigestion; * ix) Having a history of allergies to the studied drugs and food; * x) Having difficulties in attending the trial (such as paralysis, serious mental illness, dementia, renal diseases, stroke, coronary atherosclerotic heart diseases, diabetes or mental diseases, illiteracy); * xi) Unwilling to sign the informed consent.