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ClinicalTrials.gov public records Last synced Oct 10, 2026, 10:51 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 49–72 of 201 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Roux-en Y Gastric Bypass Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Use of Probiotics to Aid in Weight Loss

NCT01445704
View directory record Official record
Conditions
Weight Loss
Interventions
Probiotics, Placebo
Dietary Supplement
Lead sponsor
Prisma Health-Upstate
Other
Eligibility
18 Years and older
Enrollment
151 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Greenville, South Carolina
Source: ClinicalTrials.gov public record
Updated Apr 9, 2014 · Synced Oct 10, 2026, 10:51 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 Jan 1, 2010 · Synced Oct 10, 2026, 10:51 AM EDT
Completed Phase 1 Interventional

Glucose Metabolism in the Immediate and Short Term Follow up After Bariatric Surgery

NCT00488423
View directory record Official record
Conditions
Diabetes, Gastric Bypass
Interventions
Mixed Meal Tolerance test, Hyperglycemic clamp
Procedure
Lead sponsor
The Cleveland Clinic
Other
Eligibility
19 Years to 65 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 22, 2011 · Synced Oct 10, 2026, 10:51 AM EDT
Completed No phase listed Observational

Adolescent Gastric By-pass and Diabetic Precursors

NCT00360373
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
15 Years to 45 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2012
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 6, 2014 · Synced Oct 10, 2026, 10:51 AM EDT
Completed Phase 2 Interventional

An Open-Label Study of XOMA 358 in Patients With Hypoglycemia After Gastric Bypass Surgery

NCT02772718
View directory record Official record
Conditions
Hypoglycemia
Interventions
XOMA 358 single dose level A, XOMA 358 single dose level B, XOMA 358 single dose level C, XOMA 358 multiple dose level 1
Drug
Lead sponsor
XOMA (US) LLC
Industry
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
5
States / cities
Aurora, Colorado • Chicago, Illinois • Baltimore, Maryland + 2 more
Source: ClinicalTrials.gov public record
Updated May 21, 2021 · Synced Oct 10, 2026, 10:51 AM EDT
Completed No phase listed Observational

Assessment of Insulin Resistance, NAFLD, Predictors of CV Morbidity, and Subcutaneous Adipose and Visceral Adipose Gene Expression in Patients Undergoing Gastric Bypass Surgery

NCT01007955
View directory record Official record
Conditions
Morbid Obesity, Insulin Resistance, Non-Alcoholic Fatty Liver Disease
Interventions
Not listed
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years to 65 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2012
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 24, 2012 · Synced Oct 10, 2026, 10:51 AM EDT
Withdrawn No phase listed Observational

Bariatric Surgery Outcomes

NCT01057784
View directory record Official record
Conditions
Morbid Obesity
Interventions
Bariatric surgery.
Procedure
Lead sponsor
University of California, Los Angeles
Other
Eligibility
Not listed
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
2
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Dec 8, 2014 · Synced Oct 10, 2026, 10:51 AM EDT
Terminated No phase listed Observational

A Study to Examine Changes in GIP Plasma Levels Following Gastric Bypass Surgery in Obese Patients

NCT00207389
View directory record Official record
Conditions
Obesity, Type 2 Diabetes Mellitus, Insulin Resistance
Interventions
Not listed
Lead sponsor
Boston Medical Center
Other
Eligibility
21 Years to 64 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 26, 2017 · Synced Oct 10, 2026, 10:51 AM EDT
Not listed Phase 4 Interventional

Impact of Bariatric Surgery on Pharmacokinetic Study of Simvastatin and Carvedilol

NCT04049786
View directory record Official record
Conditions
Obesity, Bariatric Surgery, Roux-en Y Gastric Bypass
Interventions
Digestive biopsy, Carvedilol 25mg, Serial blood sampling for PK analysis, Metoprolol 100 mg for CYP2D6 phenotyping, Simvastatin 40mg, Midazolam 2 mg for CYP3A4 phenotyping, Genotyping
Procedure · Drug · Other
Lead sponsor
Natalia Valadares de Moraes
Other
Eligibility
18 Years to 65 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Feb 8, 2022 · Synced Oct 10, 2026, 10:51 AM EDT
Completed No phase listed Observational

Symptomatic, Biomechanical and Radiographic Outcomes in Knee Osteoarthritis Following Gastric Bypass Surgery

NCT00194051
View directory record Official record
Conditions
Obesity, Osteoarthritis
Interventions
gastric bypass surgery
Procedure
Lead sponsor
University Hospitals Cleveland Medical Center
Other
Eligibility
35 Years to 60 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 26, 2022 · Synced Oct 10, 2026, 10:51 AM EDT
Recruiting Not applicable Interventional

GI Oxalate Absorption

NCT05356000
View directory record Official record
Conditions
Bariatric Surgery Candidate, Kidney Stone
Interventions
Special low-oxalate diet followed by all-day visit to University of Chicago research clinic
Other
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 70 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 19, 2025 · Synced Oct 10, 2026, 10:51 AM EDT
Not listed Not applicable Interventional

Laparoscopic Gastric Bypass for Type 2 Diabetes Mellitus With Body Mass Index (BMI) < 35

NCT00999050
View directory record Official record
Conditions
Diabetes Mellitus, Type 2
Interventions
Gastric bypass for diabetic patients <35 BMI
Procedure
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 4, 2011 · Synced Oct 10, 2026, 10:51 AM EDT
Completed Phase 4 Interventional Results available

Pramlintide (Symlin) for the Treatment of Hypoglycemia Following Gastric Bypass Surgery

NCT01841359
View directory record Official record
Conditions
Hypoglycemia, Evidence of Previous Gastric Surgery
Interventions
Pramlintide
Drug
Lead sponsor
Joslin Diabetes Center
Other
Eligibility
21 Years to 65 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 29, 2023 · Synced Oct 10, 2026, 10:51 AM EDT
Completed Phase 4 Interventional Results available

A Pilot Study of the Efficacy of Alli in the Management of Pre-operative Weight Loss Required for Bariatric Surgery.

NCT01035333
View directory record Official record
Conditions
Obesity
Interventions
Orlistat
Drug
Lead sponsor
Albany College of Pharmacy and Health Sciences
Other
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Albany, New York
Source: ClinicalTrials.gov public record
Updated Apr 4, 2014 · Synced Oct 10, 2026, 10:51 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 9, 2021 · Synced Oct 10, 2026, 10:51 AM EDT
Completed No phase listed Observational

Metabolomics of Roux-en-Y Gastric Bypass (RYGB) With Gastrostomy

NCT00887302
View directory record Official record
Conditions
Type II Diabetes Mellitus, Obesity
Interventions
Gastric Band, Gastric Sleeve, Gastrostomy Tube
Procedure
Lead sponsor
East Carolina University
Other
Eligibility
18 Years to 60 Years · Female only
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Greenville, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 6, 2023 · Synced Oct 10, 2026, 10:51 AM EDT
Completed Not applicable Interventional Results available

Laparoscopic Gastric Bypass vs LAP-BAND for Treatment of Morbid Obesity

NCT00247377
View directory record Official record
Conditions
Morbid Obesity
Interventions
Gastric bypass surgery, Lap-Band
Procedure
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years to 60 Years
Enrollment
197 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2009
U.S. locations
1
States / cities
Orange, California
Source: ClinicalTrials.gov public record
Updated Apr 24, 2023 · Synced Oct 10, 2026, 10:51 AM EDT
Completed Phase 4 Interventional Results available

Ulcer Prevention Study in Post Gastric Bypass Patients

NCT00557349
View directory record Official record
Conditions
Marginal Ulcers
Interventions
Omeprazole, Famotidine
Drug
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 19, 2017 · Synced Oct 10, 2026, 10:51 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Perioperative Ketamine for Pain With Gastric Bypass

NCT03448068
View directory record Official record
Conditions
Laparoscopic Gastric Bypass Surgery, Ketamine
Interventions
Ketamine, Standard therapy
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 69 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Apr 29, 2021 · Synced Oct 10, 2026, 10:51 AM EDT
Completed Phase 2 Interventional

Medically Reproducing Bariatric Surgery

NCT03225209
View directory record Official record
Conditions
Type 2 Diabetes Mellitus
Interventions
OPTIFAST
Other
Lead sponsor
Moahad S Dar
Other
Eligibility
25 Years to 70 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
Greenville, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 31, 2020 · Synced Oct 10, 2026, 10:51 AM EDT
Completed Not applicable Interventional Results available

The Effect of Pre-Operative Transversus Abdominis Plane (TAP) Block in the Post Operative Opioid Consumption in Morbid Obese Patients Undergoing Laparoscopic Gastric Bypass Surgery: A Prospective,Randomized, Blinded Study

NCT01075087
View directory record Official record
Conditions
Pain, Obesity, Surgery
Interventions
Placebo, (study group) will receive a bilateral TAP block using 20 cc of 0.5% ropivacaine on each side.
Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 65 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 26, 2014 · Synced Oct 10, 2026, 10:51 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 17, 2011 · Synced Oct 10, 2026, 10:51 AM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

Rivaroxaban Effects in Subjects Who Have Undergone Gastric Bypass Surgery

NCT02058199
View directory record Official record
Conditions
Gastric Bypass Status
Interventions
rivaroxaban
Drug
Lead sponsor
State University of New York - Upstate Medical University
Other
Eligibility
18 Years and older
Enrollment
2 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Jan 5, 2016 · Synced Oct 10, 2026, 10:51 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 24, 2026 · Synced Oct 10, 2026, 10:51 AM EDT