Stigma and Efficacy of Zhizhu Kuanzhong Capsules

Inclusion Criteria: * The inclusion criteria includes: * 18-70 years old; * education level higher than middle school; * met the Rome IV criteria for FD; * absence of abnormalities on physical examination, laboratory tests (including a routine blood test, blood glucose, and liver function examination), and abdominal imaging and GI endoscopy within 6 months; * absence of Helicobacter pylori infection; * signed written informed consent for participation in the study. Exclusion Criteria: * The exclusion criteria includes: * evidence of organic digestive diseases; * diabetes, cancer and other diseases might affect GI function; * pregnancy, lactation or breastfeeding; * a history of allergic reaction to any of the drugs used in the study; * participation in other clinical trials in the previous 3 months.