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Showing 1–24 of 88 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Post-gastric Bypass Clear all
Withdrawn Phase 4 Interventional Accepts healthy volunteers

Study of Proton Pump Inhibitors (PPI) to Prevent Strictures After Gastric Bypass Surgery

NCT00361985
View directory record Official record
Conditions
Anastomotic Stricture, Morbid Obesity
Interventions
Esomeprazole
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years to 60 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 31, 2016 · Synced Sep 25, 2026, 4:33 AM EDT
Terminated Not applicable Interventional

Effects of a Novel Dietary Intervention on Body Composition After Laparoscopic Gastric Bypass Surgery

NCT01041261
View directory record Official record
Conditions
Obesity, Morbid Obesity
Interventions
BariatrX Essentials 360 Treatment
Dietary Supplement
Lead sponsor
MetaProteomics LLC
Industry
Eligibility
25 Years and older · Female only
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 12, 2012 · Synced Sep 25, 2026, 4:33 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Exendin-9,39 and Satiety After Bariatric Surgery

NCT02779075
View directory record Official record
Conditions
Obesity
Interventions
Saline, Exendin-9,39
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
20 Years to 70 Years
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 30, 2020 · Synced Sep 25, 2026, 4:33 AM EDT
Active, not recruiting Phase 2Phase 3 Interventional

GLP-1 Receptor Agonists Post-Bariatric Surgery (GRABS) Pilot Trial

NCT06162715
View directory record Official record
Conditions
Severe Obesity, Obesity, BMI Greater Than 30
Interventions
Tirzepatide, Standard of Care post-gastric bypass
Drug · Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
25 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 3, 2026 · Synced Sep 25, 2026, 4:33 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

The Contribution of Incretin Hormones to Post-prandial Glucose Metabolism After Roux-en-Y Gastric Bypass

NCT01843881
View directory record Official record
Conditions
Type 2 Diabetes Mellitus
Interventions
Exendin 9, 39, Placebo
Drug
Lead sponsor
Adrian Vella
Other
Eligibility
20 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 3, 2013 · Synced Sep 25, 2026, 4:33 AM EDT
Completed No phase listed Observational

Roux-en-Y Gastric Bypass and Weight Regain

NCT02302898
View directory record Official record
Conditions
Obesity
Interventions
Eating Behavior Evaluation, Measurement of Functional gastric volume, Measurement of gastric pouch and GJ size
Behavioral · Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
21 Years to 60 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 8, 2018 · Synced Sep 25, 2026, 4:33 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Preliminary Comparison of the Blood Levels of Medications in Obese Subjects Compared to Post-Gastric Bypass Subjects

NCT01015976
View directory record Official record
Conditions
Obesity
Interventions
bariatric surgery, control
Procedure · Other
Lead sponsor
Neuropsychiatric Research Institute, Fargo, North Dakota
Other
Eligibility
18 Years to 60 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Fargo, North Dakota
Source: ClinicalTrials.gov public record
Updated Mar 30, 2014 · Synced Sep 25, 2026, 4:33 AM EDT
Completed No phase listed Observational

Microenvironment of Adipose Tissue in Endocannabinoid System

NCT00978289
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
Vanderbilt University
Other
Eligibility
20 Years to 60 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 18, 2013 · Synced Sep 25, 2026, 4:33 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Ghrelin and Insulin Resistance

NCT00884494
View directory record Official record
Conditions
Obesity, Insulin Resistance, Normal Weight,Healthy Controls
Interventions
Ghrelin infusion to assess effects on insulin sensitivity
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 19, 2017 · Synced Sep 25, 2026, 4:33 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Nutritional Effect of an Amino Acid Mixture on Lean Body Mass (LBM) in Post-bariatric Surgery Patients

NCT00473356
View directory record Official record
Conditions
Obesity, Post-gastric Bypass
Interventions
receive amino acid supplement
Dietary Supplement
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Nov 18, 2013 · Synced Sep 25, 2026, 4:33 AM EDT
Completed No phase listed Observational

Laparoscopic Revision Gastric Bypass for Inadequate Initial Weight Loss

NCT01040377
View directory record Official record
Conditions
Inadequate Initial Weight Loss, Persistent Clinically Severe Obesity
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Fresno, California
Source: ClinicalTrials.gov public record
Updated Dec 28, 2009 · Synced Sep 25, 2026, 4:33 AM EDT
Not listed Not applicable Interventional

Intraperitoneal Aerosolized Delivery of a Local Anesthetic for Post Operative Pain Management. A Double Blind, Randomised Controlled Clinical Trial.

NCT00286286
View directory record Official record
Conditions
Pain, Postoperative, Postoperative Pain, Abdominal Pain, Obesity, Pneumoperitoneum
Interventions
Intraperitoneal Aerosolization System, IntraMyst
Device
Lead sponsor
Northgate Technologies
Industry
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006
U.S. locations
2
States / cities
Elk Grove Village, Illinois • Hoffman Estates, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 10, 2007 · Synced Sep 25, 2026, 4:33 AM EDT
Terminated Not applicable Interventional

Laparoscopic Revision of an Enlarged Gastric Outlet After Gastric Bypass

NCT01116284
View directory record Official record
Conditions
Morbid Obesity
Interventions
Revision of gastric bypass
Procedure
Lead sponsor
Baystate Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Springfield, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 11, 2016 · Synced Sep 25, 2026, 4:33 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Cerebrospinal Fluid Biomarkers in Bariatric Surgery

NCT04350892
View directory record Official record
Conditions
Obesity
Interventions
Roux-en-Y Gastric Bypass (RYGB), Sleeve Gastrectomy (SG), Very Low Calorie Diet (VLCD)
Procedure · Behavioral
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 65 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 27, 2026 · Synced Sep 25, 2026, 4:33 AM EDT
Completed Not applicable Interventional

Mechanisms of Diabetes Relapse After Bariatric Surgery

NCT01516320
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Roux-en-Y Gastric Bypass, Laparoscopic adjustable gastric banding, Vertical Sleeve Gastrectomy
Procedure
Lead sponsor
Blandine Laferrere
Other
Eligibility
18 Years to 65 Years
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 31, 2017 · Synced Sep 25, 2026, 4:33 AM EDT
Completed Phase 4 Interventional Results available

Preoperative Pain Control in Gastric Bypass Surgery Patients

NCT01801189
View directory record Official record
Conditions
Post-operative Pain
Interventions
Pregabalin, Placebo (for Pregabalin)
Drug
Lead sponsor
Legacy Health System
Other
Eligibility
18 Years to 70 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jul 13, 2022 · Synced Sep 25, 2026, 4:33 AM EDT
Completed Phase 2 Interventional Results available

Oral Acetaminophen for Post-Op Pain Management in Bariatric Surgery Patients

NCT06658574
View directory record Official record
Conditions
Post Operative Analgesia, Bariatric Surgery, Bariatric Surgery (Gastric Bypass), Bariatric Surgery Patients, Perioperative Analgesia
Interventions
Acetaminophen
Drug
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years and older
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Aug 23, 2026 · Synced Sep 25, 2026, 4:33 AM EDT
Completed No phase listed Observational

Chronic Marginal Ulcers After Gastric Bypass

NCT01041079
View directory record Official record
Conditions
Marginal Ulcer, Chronic Ulcer Disease, Persistent Ulcer Disease, Recurrent Ulcer Disease, Late Morbidity After Gastric Bypass
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Fresno, California
Source: ClinicalTrials.gov public record
Updated Dec 31, 2009 · Synced Sep 25, 2026, 4:33 AM EDT
Completed No phase listed Observational

Ghrelin Changes After Roux-en-Y Gastric Bypass

NCT00765596
View directory record Official record
Conditions
Obesity, Insulin Resistance
Interventions
Liquid diet for 3 days
Other
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 60 Years
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2005
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Nov 16, 2011 · Synced Sep 25, 2026, 4:33 AM EDT
Withdrawn Phase 4 Interventional

Changes in Oral Contraceptive Hormones After Gastric Bypass Surgery

NCT01941134
View directory record Official record
Conditions
Bariatric Surgery Candidate, Contraception
Interventions
ethinyl estradiol-levonorgestrel
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 40 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 20, 2018 · Synced Sep 25, 2026, 4:33 AM EDT
Not listed Not applicable Interventional

Efficacy of IV Acetaminophen in Acute Post-Operative Pain Control in Laparoscopic Roux-en-Y Gastric Bypass Surgery (LRYGBP) Patients

NCT01460667
View directory record Official record
Conditions
Morbid Obesity
Interventions
IV acetaminophen, IV normal saline
Drug
Lead sponsor
McLaren Regional Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2011
U.S. locations
1
States / cities
Flint, Michigan
Source: ClinicalTrials.gov public record
Updated Oct 26, 2011 · Synced Sep 25, 2026, 4:33 AM EDT
Completed Phase 2 Interventional

PRebiotic to IMprovE Calcium Absorption

NCT03272542
View directory record Official record
Conditions
Obesity
Interventions
Prebiotic: soluble corn fiber, Placebo: maltodextrin
Dietary Supplement
Lead sponsor
San Francisco Veterans Affairs Medical Center
Federal
Eligibility
18 Years to 75 Years · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Oct 21, 2020 · Synced Sep 25, 2026, 4:33 AM EDT
Completed Not applicable Interventional

Enhanced Recovery After Surgery in Laparoscopic Sleeve Gastrectomy

NCT03520803
View directory record Official record
Conditions
Obesity
Interventions
Enhanced recovery after surgery protocol
Other
Lead sponsor
Hartford Hospital
Other
Eligibility
18 Years to 70 Years
Enrollment
132 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Hartford, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 8, 2021 · Synced Sep 25, 2026, 4:33 AM EDT
Terminated Not applicable Interventional

Early Intervention for Morbidly Obese Patients After Roux-en-Y Gastric Bypass (RYGB) Surgery

NCT01329692
View directory record Official record
Conditions
Weight Loss, Obesity
Interventions
Lifestyle counseling
Behavioral
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 7, 2012 · Synced Sep 25, 2026, 4:33 AM EDT