| Completed | Efficacy of Guided Imagery Therapy Mobile Application for Functional Abdominal Pain NCT06653647 | Baylor College of Medicine | N/A |
| Recruiting | Safety and Efficacy of Crofelemer in Adult Patients With Short Bowel Syndrome and Intestinal Failure (SBS-IF) NCT06904872 | Napo Therapeutics, S.p.A. | Phase 2 |
| Recruiting | Environmental Exposure to Heavy Metals, Nanoparticles, and Emergent Contaminants and Risk of Allergic Diseases NCT06529913 | Fondazione Policlinico Universitario Agostino Gemelli IRCCS | N/A |
| Recruiting | Evolution of Functional Gastrointestinal Disorders in Infants Fed With a New Infant Formula NCT06488274 | United Pharmaceuticals | N/A |
| Recruiting | Exploring Treatments for Children's Abdominal Pain: Comparing Trimebutine and Probiotics NCT06268964 | Universidad de Colima | Phase 1 / Phase 2 |
| Not Yet Recruiting | Validation of a Mental Health Scale for Young People With Chronic Stomach Symptoms NCT06394154 | Greg O'Grady | — |
| Recruiting | Prevalence of FGIDs and Probiotics Study NCT06309199 | Chulalongkorn University | N/A |
| Unknown | Gastro-intestinal Biopotential Recorder by Means of Surface ELEctrodes NCT06197334 | Central Hospital, Nancy, France | N/A |
| Unknown | Physical Exercise and Nutrition in Functional Gastrointestinal Disorders in Obese Children NCT06017856 | Meir Medical Center | — |
| Enrolling By Invitation | Intervention Study Focused on the Intestinal Microbiome to Evaluate the Impact of a Wild Thyme Extract (Thymus NCT06639126 | Fundación Pública Andaluza para la Investigación Biomédica Andalucía Oriental | N/A |
| Completed | Low-FODMAP Diet and Probiotics: Effects on Gut, Behavior, and Microbiota in Children With Autism Spectrum Diso NCT07086157 | Marmara University Pendik Training and Research Hospital | N/A |
| Recruiting | Capsule Microbiota Sampling in IBS/Functional Gastrointestinal Disease NCT06215222 | Stanford University | — |
| Terminated | Transcutaneous Electric Nerve Stimulation (TENS) for Vagal Modulation NCT05987813 | Virginia Commonwealth University | N/A |
| Unknown | Quantification of Fecal Calprotectin Concentration Difference Between Infants Aged Under 4 Months Old Sufferin NCT05936112 | Centre Hospitalier Universitaire de Besancon | N/A |
| Completed | Application of Diaphragmatic Breathing in Patients With Disorders of Gut-brain Interaction NCT06205446 | Buddhist Tzu Chi General Hospital | N/A |
| Recruiting | Traditional Dietary Advice Versus Low FODMAP Diet in Postprandial Functional Dyspepsia NCT05810168 | Sheffield Teaching Hospitals NHS Foundation Trust | N/A |
| Unknown | A Personalized Approach to Abdominal Pain in Irritable Bowel Syndrome NCT05998577 | Maastricht University Medical Center | N/A |
| Completed | Jing Si Herbal Tea for Long-Coronavirus Disease(COVID) Gut-brain Interaction NCT05668104 | Buddhist Tzu Chi General Hospital | N/A |
| Completed | Efficacy of a Low FODMAP Diet in IBS Children and Impact on Urinary and Faecal Metabolome NCT06618677 | University of Bari | N/A |
| Unknown | Prevalence and Associated Factors of Functional Gastrointestinal Disorders Among Children NCT05605405 | Assiut University | — |
| Active Not Recruiting | i-CBT Functional Gastrointestinal Disorders in Youth: the Impact of Negative Illness Understanding and Parenta NCT05486585 | Aarhus University Hospital | N/A |
| Recruiting | Low FODMAP Diet in FD (PDS) NCT05832528 | Universitaire Ziekenhuizen KU Leuven | N/A |
| Recruiting | Traditional Dietary Advice Versus Reassurance-alone in Postprandial Functional Dyspepsia NCT05718960 | Sheffield Teaching Hospitals NHS Foundation Trust | N/A |
| Completed | Internet-delivered CBT for Functional Gastrointestinal Disorders (FGID) in Youth: a Single Case Experimental D NCT05237882 | Aarhus University Hospital | N/A |
| Recruiting | Effect of Fecal Microbiota Transplantation (FMT) in Pediatric Functional Gastrointestinal Disorders NCT05753774 | Biao Zou | N/A |
| Recruiting | Prevalence and Natural History of Functional Gastrointestinal Disorders Among At-risk Infants. NCT06031025 | Fondazione Policlinico Universitario Agostino Gemelli IRCCS | — |
| Completed | Comprehensive Assessment of Nutrition and Dietary Intervention in Hypermobile Ehlers Danlos Syndrome NCT05148039 | Queen Mary University of London | N/A |
| Not Yet Recruiting | Sucrase-isomaltase Deficiency as a Cause of Irritable Bowel Syndrome NCT05159115 | Lovisenberg Diakonale Hospital | N/A |
| Completed | Bee Honey and Functional Dyspepsia in Children NCT05209646 | Ain Shams University | N/A |
| Completed | Behavioral Therapy in Patients With Rumination NCT05232097 | Helsinki University Central Hospital | N/A |
| Completed | Combined Gut-brain Therapy for Children With Autism NCT04639141 | The University of Queensland | N/A |
| Completed | Systematic Pediatric Assessment of Rome Criteria (SPARC) NCT04773158 | Indiana University | N/A |
| Recruiting | BSGM to Evaluate Patients With GI Symptoms NCT05880199 | Children's Hospital of Philadelphia | — |
| Completed | Effect of 35624® Alflorex® in Functional Gastrointestinal Disorders (FGIDs) in Children. NCT04922476 | PrecisionBiotics Group Ltd. | N/A |
| Recruiting | Auricular Vagal Nerve Stimulation for Hypermobile Ehlers-Danlos Syndrome NCT05212129 | Medical College of Wisconsin | N/A |
| Completed | Hypnotherapy Through Self-exercises in Children With Functional Abdominal Pain in Primary Care NCT05636358 | University Medical Center Groningen | N/A |
| Completed | Effects of Imagery Therapy vs Progressive Muscle Relaxation Therapy on Patients With Functional Abdominal Bloa NCT04789967 | Universiti Sains Malaysia | N/A |
| Unknown | Whether Probiotics Use in Neonate and Infant Improve Their Mother's Life Quality NCT04741971 | Buddhist Tzu Chi General Hospital | N/A |
| Completed | 13C-Octanoic Acid Breath Test on Gastric Emptying in Celiac Patients With Functional Disorders NCT07089498 | Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico | N/A |
| Completed | Responses to a Comfort Meal in Functional Dyspepsia NCT04722419 | Hospital Universitari Vall d'Hebron Research Institute | N/A |
| Unknown | Stigma and Efficacy of Zhizhu Kuanzhong Capsules NCT05107999 | RenJi Hospital | N/A |
| Completed | Jing Si Herbal Tea in the Treatment of Dyspeptic Symptoms NCT05948215 | Buddhist Tzu Chi General Hospital | N/A |
| Unknown | Effects of an Apple Derived Fibre Supplement on Constipation NCT04625881 | University of Chile | Phase 3 |
| Terminated | A Study of Randomized Sham-control Auricular TENS Unit Stimulation in Pediatric Functional Gastrointestinal Di NCT04247100 | Gisela Grotewold Chelimsky | N/A |
| Unknown | The Role of Neuromodulators in Refractory Functional Dyspepsia NCT05099913 | RenJi Hospital | N/A |
| Unknown | Multi-center Study on Pediatric Functional Gastrointestinal Disorders in Mainland China NCT04388137 | Zhejiang University | — |
| Completed | Patient Education in Children With Functional Gastrointestinal Disorders NCT04294420 | Karolinska Institutet | N/A |
| Unknown | Effects of Blueberries on Symptoms and Underlying Mechanisms of Functional Gastrointestinal Disorders NCT04824976 | Brain-Gut Research Group | N/A |
| Unknown | A Cross-sectional Investigation on Characteristics of Gastrointestinal Symptoms in China NCT04202588 | Hong Kong Baptist University | — |
| Completed | A Study to Assess the Efficacy and Safety of Salix Probiotic Blend in Participants With Functional Gastrointes NCT04155801 | Bausch Health Americas, Inc. | N/A |
| Unknown | Effect of a Diet Without Non-caloric Sweeteners on Gastrointestinal Symptoms in Patients With IBS and Dyspepsi NCT04129762 | Hospital General de Mexico | N/A |
| Unknown | Brain-Gut-Microbiota Interaction in IBS NCT04296552 | Haukeland University Hospital | N/A |
| Unknown | SMS Reminders and Treatment Compliance and Efficacy in Patients With FGIDs NCT04052750 | RenJi Hospital | N/A |
| Completed | The Healthy Endoscopy Study NCT04369963 | Seattle Children's Hospital | — |
| Unknown | Fructose and Lactose Intolerance and Malabsorption in Functional Gastrointestinal Disorders NCT02085889 | Brain-Gut Research Group | — |
| Completed | Do Biomarkers Predict Response to a Pediatric Chronic Pain Symptom Management Program? NCT03823742 | Baylor College of Medicine | N/A |
| Completed | Does Improving Vagal Tone Increase Mitochondrial Bioenergetics NCT03931330 | Medical College of Wisconsin | N/A |
| Completed | The Association of Clinical Symptom Clusters With Underlying Mechanisms in Functional Gastrointestinal Disorde NCT04331223 | Brain-Gut Research Group | — |
| Completed | Prevalence of Functional Gastrointestinal Disorders (FGIDs), Related Signs and Symptoms in Infants/Toddlers in NCT03608735 | Danone Asia Pacific Holdings Pte, Ltd. | — |
| Completed | Observational Prospective Study With Probiotic Supplementation on Infants With FGDI NCT04944628 | AB Biotics, SA | — |
| Enrolling By Invitation | NLP to Aid in the Evaluation and Diagnosis of FGIDs NCT05501028 | Massachusetts General Hospital | — |
| Withdrawn | Evaluation of A Partially Hydrolyzed in Improving FGIDs Symptoms NCT03390309 | Children's Hospital of Fudan University | N/A |
| Completed | Defining Adolescent Nausea Through Brain Imaging and Neurostimulation Response NCT03675321 | Medical College of Wisconsin | N/A |
| Completed | Functional Gastrointestinal Disorders in Pediatric IBD NCT03565263 | University Hospital, Caen | — |
| Completed | ICBT for Pain-predominant FGIDs in Children and Adolescents: an Implementation Study. NCT03252743 | Karolinska Institutet | N/A |
| Unknown | Impact of Stigma on Compliance to Medication in Functional Dyspepsia NCT03625674 | RenJi Hospital | N/A |
| Completed | Prevalence of FODMAP Intolerance and JHS in FGID and Association With Microbiome, Dyssynergic Defecation and D NCT03460613 | University of Zurich | N/A |
| Completed | Behavioural Treatment for Functional Bowel Symptoms in Inflammatory Bowel Disease NCT03177044 | St Vincent's Hospital Melbourne | N/A |
| Completed | Managing Side Effects in Clinical Practice NCT03475550 | Beth Israel Deaconess Medical Center | N/A |
| Enrolling By Invitation | Precision Diagnostics in Inflammatory Bowel Disease, Cellular Therapy and Transplantation (The PREDICT Trial) NCT03369353 | Boston Children's Hospital | — |
| Completed | Efficacy of Audio Recorded Guided Imagery vs Deep Breathing Exercises on Functional Gastrointestinal Pain Diso NCT03100487 | Baylor College of Medicine | N/A |
| Completed | Fructose Breath-testing in Irritable Bowel Syndrome (IBS) NCT02614313 | Brain-Gut Research Group | N/A |
| Enrolling By Invitation | Functional GI Disease Registry NCT05295446 | Massachusetts General Hospital | — |
| Completed | Targeted Food Elimination for Treatment of Functional Gastrointestinal Diseases in Children NCT02565355 | London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's | N/A |
| Completed | Internet-delivered CBT for Children With Functional Gastrointestinal Disorders - an Open Pilot Study NCT02475096 | Karolinska Institutet | N/A |
| Completed | Internet-delivered CBT for Functional Abdominal Pain in Adolescents - a Pilot NCT02306941 | Karolinska Institutet | N/A |
| Completed | Effect of Controlled Diet Combined With a Fermented Milk Product on Gas-related Symptoms NCT02936713 | Danone Global Research & Innovation Center | N/A |
| Terminated | Campylobacter Enteritis and PI-BD: Dietary Reduction in Carbohydrates NCT02232373 | University of Nottingham | N/A |
| Completed | Effect of Prebiotics Versus Low FODMAPs Diet on Intestinal Microbiota and Symptoms NCT02210572 | Hospital Universitari Vall d'Hebron Research Institute | N/A |
| Completed | Efficacy of Open Label Placebo in Children With FGIDs NCT02389998 | Boston Children's Hospital | N/A |
| Completed | Internet-delivered CBT for Irritable Bowel Syndrome in Adolescents NCT02306369 | Karolinska Institutet | N/A |
| Completed | Emotion Focused Therapy in Irritable Bowel Syndrome Patients NCT02657668 | Islamic Azad University, Najafabad Branch | N/A |
| Completed | Cow's Milk Allergy and Functional Gastrointestinal Disorders NCT01901380 | Federico II University | — |
| Terminated | Phase 2a Study of IW-9179 to Treat Functional Dyspepsia NCT01712412 | Ironwood Pharmaceuticals, Inc. | Phase 2 |
| Completed | GLP-1 Inhibits Prandial Antro-duodeno-jejunal Motility in Humans NCT02731664 | Uppsala University | Phase 1 |
| Completed | Internet-delivered Cognitive Behavior Therapy for Adolescents With Functional Gastrointestinal Disorders: a Pi NCT02033161 | Karolinska Institutet | N/A |
| Completed | Pepsin in Patients With Functional Dyspepsia NCT03076411 | Nordmark Arzneimittel GmbH & Co. KG | — |
| Completed | The Effect of Amoxicillin Versus Placebo on Gastrointestinal Motility in Children NCT01530009 | Nationwide Children's Hospital | N/A |
| Completed | Effect of Chicory-derived Inulin on Abdominal Sensations and Bowel Motor Function NCT02727166 | Hospital Universitari Vall d'Hebron Research Institute | N/A |
| Completed | Glucomannan for the Treatment of Abdominal Pain-related Functional Gastrointestinal Disorders in Childhood NCT01495806 | Medical University of Warsaw | Phase 4 |
| Completed | Study in Patients Suffering From Heartburn and Backward Flow of Stomach Liquid Into the Esophagus NCT04059900 | Bayer | Phase 2 |
| Completed | An Effectiveness and Safety Study of Chinese Herbal Medicine for Functional Constipation NCT00741936 | Hong Kong Baptist University | Phase 2 |
| Completed | Study to Learn More About the Onset of Effect of Iberogast in Patients Suffering From Abnormal Stomach and Int NCT04059783 | Bayer | — |
| Completed | Study to Learn More About the Stomach and Intestine Complaints of Children Aged From 3 to 14 Years NCT04029376 | Bayer | — |
| Completed | Probiotics for Irritable Bowel Syndrome NCT00355810 | Norwegian University of Science and Technology | N/A |
| Completed | Overlap FGIDs and Genetic Polymorphism NCT04712617 | Seoul National University Bundang Hospital | — |
| Completed | Study of Medication for Functional Abdominal Pain in Children NCT00564525 | Ann & Robert H Lurie Children's Hospital of Chicago | Phase 4 |