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ClinicalTrials.gov public records Last synced Oct 13, 2026, 8:09 AM EDT

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Showing 121–144 of 201 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Roux en Y Gastric Bypass Clear all
Terminated Phase 1 Interventional

Rosuvastatin Interethnic PK Study

NCT02215174
View directory record Official record
Conditions
Statin Pharmacokinetics Pre and Post Gastric Bypass Surgery
Interventions
Rosuvastatin
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jan 18, 2020 · Synced Oct 13, 2026, 8:09 AM EDT
Completed No phase listed Observational

Very Long Term Results After Laparoscopic Retrocolic Antegastric Gastric Bypass

NCT01040507
View directory record Official record
Conditions
Clinically Severe Obesity
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years
Enrollment
242 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Fresno, California
Source: ClinicalTrials.gov public record
Updated Dec 29, 2009 · Synced Oct 13, 2026, 8:09 AM EDT
Completed Phase 1 Interventional

Study to Examine the Effect of Gastric Bypass Surgery on Venlafaxine ER Blood Levels

NCT01867255
View directory record Official record
Conditions
Bariatric Surgery, Gastric Bypass, Roux-en-Y Gastric Bypass
Interventions
venlafaxine ER (extended-release) 75 mg
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 23, 2015 · Synced Oct 13, 2026, 8:09 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Skeletal Health in Bariatric Surgery Patients

NCT03331536
View directory record Official record
Conditions
Bariatric Surgery, Osteoporosis, Fractures, Bone, Roux En-Y Gastric Bypass, Sleeve Gastrectomy, Menopause, Premenopause
Interventions
Roux en Y Gastric Bypass Pre-menopausal, Roux en Y Gastric Bypass Post-menopausal, Sleeve Gastrectomy Pre-menopausal, Sleeve Gastrectomy Post-menopausal
Procedure
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
19 Years and older · Female only
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 18, 2020 · Synced Oct 13, 2026, 8:09 AM EDT
Not listed Not applicable Interventional

The S.L.I.M.M.S. Procedure for Severe Clinical Obesity

NCT04592601
View directory record Official record
Conditions
Morbid Obesity, Metabolic Syndrome, Type2 Diabetes, Insulin Resistance
Interventions
S.L.I.M.M.S. Procedure
Procedure
Lead sponsor
The N.E.W. Program
Other
Eligibility
18 Years to 65 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
2
States / cities
Newport Beach, California • Tustin, California
Source: ClinicalTrials.gov public record
Updated Oct 19, 2020 · Synced Oct 13, 2026, 8:09 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Study to Determine Incidence of Hypoventilation in Patients Who Have Undergone Gastric Bypass

NCT00316446
View directory record Official record
Conditions
Morbid Obesity, Bariatric Surgery
Interventions
Not listed
Lead sponsor
University of South Florida
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2009
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Sep 20, 2012 · Synced Oct 13, 2026, 8:09 AM EDT
Completed Not applicable Interventional

Randomized Trial Comparing Laparoscopic Roux-en-y Gastric Bypass to Micro-laparoscopic Roux-en-y Gastric Bypass

NCT01183273
View directory record Official record
Conditions
Obesity
Interventions
Microlaparoscopic gastric bypass, Laparoscopic Surgery
Procedure
Lead sponsor
Suzanne J. Rose
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Danbury, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 22, 2014 · Synced Oct 13, 2026, 8:09 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Changes in Body Composition Following Bariatric Surgery

NCT02148068
View directory record Official record
Conditions
Obesity
Interventions
Bariatric Surgery
Procedure
Lead sponsor
Peter Nau
Other
Eligibility
18 Years to 65 Years
Enrollment
136 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Nov 20, 2018 · Synced Oct 13, 2026, 8:09 AM EDT
Active, not recruiting Phase 3 Interventional

Avexitide for Treatment of Post-Bariatric Hypoglycemia

NCT06747468
View directory record Official record
Conditions
Post Bariatric Hypoglycemia
Interventions
Avexitide, Placebo
Drug · Other
Lead sponsor
Amylyx Pharmaceuticals Inc.
Industry
Eligibility
18 Years and older
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
21
States / cities
Stanford, California • Aurora, Colorado • Jacksonville, Florida + 16 more
Source: ClinicalTrials.gov public record
Updated Aug 24, 2026 · Synced Oct 13, 2026, 8:09 AM EDT
Completed Not applicable Interventional

DSS: Diabetes Surgery Study - Intensive Medical Management of Type 2 Diabetes, With and Without Gastric Bypass Surgery

NCT00641251
View directory record Official record
Conditions
Type 2 Diabetes, Cardiovascular Disease
Interventions
intensive medical management, RYGB & IMM
Other
Lead sponsor
Medtronic - MITG
Industry
Eligibility
30 Years to 67 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2016
U.S. locations
3
States / cities
Minneapolis, Minnesota • Rochester, Minnesota • New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 29, 2017 · Synced Oct 13, 2026, 8:09 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

SH Dr. Chen Gastric Bypass Study

NCT05357443
View directory record Official record
Conditions
Gastric Bypass
Interventions
Gastric bypass with transection of vagal nerves, Gastric bypass without transection of vagal nerves
Procedure
Lead sponsor
Sanford Health
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Fargo, North Dakota
Source: ClinicalTrials.gov public record
Updated Sep 30, 2025 · Synced Oct 13, 2026, 8:09 AM EDT
Completed No phase listed Observational

Laparoscopic Revision of Vertical Banded Gastroplasty to Gastric Bypass

NCT01041131
View directory record Official record
Conditions
Clinically Severe Obesity, Inadequate Weight Loss, Obesity Recidivism
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Fresno, California
Source: ClinicalTrials.gov public record
Updated Jan 1, 2010 · Synced Oct 13, 2026, 8:09 AM EDT
Completed Not applicable Interventional

Metabolic Surgery Versus Medical Management for Resolution of Type II Diabetes

NCT01044602
View directory record Official record
Conditions
Obesity, Type 2 Diabetes Mellitus
Interventions
Laboratory evaluations, sleep study, Best Medical Management, Roux-en-Y gastric bypass surgery
Other · Procedure
Lead sponsor
David Bradley MD
Other
Eligibility
25 Years to 70 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 21, 2015 · Synced Oct 13, 2026, 8:09 AM EDT
Terminated No phase listed Observational

Study Evaluating Metabolic Syndrome in Subjects Undergoing Gastric Bypass Bariatric Syndrome

NCT00283374
View directory record Official record
Conditions
Morbid Obesity, Metabolic Disease
Interventions
Laparoscopic Roux-en-Y Gastric Bypass
Procedure
Lead sponsor
Wyeth is now a wholly owned subsidiary of Pfizer
Industry
Eligibility
18 Years to 55 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2005
U.S. locations
10
States / cities
Irvine, California • Orange, California • Atlanta, Georgia + 6 more
Source: ClinicalTrials.gov public record
Updated May 18, 2006 · Synced Oct 13, 2026, 8:09 AM EDT
Completed Not applicable Interventional Results available

Hepatic Effects of Gastric Bypass Surgery

NCT00701376
View directory record Official record
Conditions
Liver Diseases
Interventions
liver biopsy
Other
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older
Enrollment
106 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 19, 2020 · Synced Oct 13, 2026, 8:09 AM EDT
Completed Not applicable Interventional Results available

Ultraviolet Light And Vitamin D In Subjects With Fat Malabsorption Or After Gastric Bypass Surgery

NCT01910792
View directory record Official record
Conditions
Vitamin D Deficiency, Gastrointestinal Diseases
Interventions
Sperti Lamp
Device
Lead sponsor
Boston University
Other
Eligibility
18 Years to 64 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 11, 2017 · Synced Oct 13, 2026, 8:09 AM EDT
Completed Early Phase 1 Interventional

Safety, Tolerability, and Pharmacodynamics of SYNB8802v1 in Subjects With History of Gastric Bypass Surgery or Short-bowel Syndrome

NCT05377112
View directory record Official record
Conditions
Enteric Hyperoxaluria
Interventions
SYNB8802v1, Placebo
Drug · Other
Lead sponsor
Synlogic
Industry
Eligibility
18 Years to 74 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Mar 17, 2023 · Synced Oct 13, 2026, 8:09 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Effects of Gastric Bypass on Blood Levels of Duloxetine

NCT00989157
View directory record Official record
Conditions
Bariatric Surgery
Interventions
Duloxetine
Drug
Lead sponsor
Neuropsychiatric Research Institute, Fargo, North Dakota
Other
Eligibility
18 Years to 60 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Fargo, North Dakota
Source: ClinicalTrials.gov public record
Updated Aug 11, 2014 · Synced Oct 13, 2026, 8:09 AM EDT
Completed Not applicable Interventional Results available

Study of the Effect of the Drug Gabapentin on Postoperative Pain and Incidence of Postoperative Nausea and Vomiting

NCT00886236
View directory record Official record
Conditions
Obesity, Morbid, Postoperative Pain, Postoperative Nausea and Vomiting
Interventions
Gabapentin, Placebo
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 80 Years
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Sep 20, 2018 · Synced Oct 13, 2026, 8:09 AM EDT
Completed Not applicable Interventional Results available

Evaluation of Endostapled Anastomoses for Laparoscopic Gastric Bypass (EEA-LGB)

NCT00254072
View directory record Official record
Conditions
Morbid Obesity
Interventions
3.5 mm vs 4.8 mm Stapler During Laparoscopic Gastric Bypass
Procedure
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years to 60 Years
Enrollment
355 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
6
States / cities
Orange, California • Tampa, Florida • Boston, Massachusetts + 3 more
Source: ClinicalTrials.gov public record
Updated Feb 18, 2010 · Synced Oct 13, 2026, 8:09 AM EDT
Completed No phase listed Observational

Bariatric Surgery and Weight Loss on Energy Metabolism and Insulin Sensitivity

NCT00936130
View directory record Official record
Conditions
Obesity, Protein-energy; Imbalance, Insulin Sensitivity, Gastrointestinal Complication
Interventions
Laparoscopic Roux-en-Y gastric bypass, Laparoscopic gastric banding, Laparoscopic sleeve gastrectomy, Low Calorie Diet
Procedure · Behavioral
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 65 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Dec 4, 2015 · Synced Oct 13, 2026, 8:09 AM EDT
Completed No phase listed Observational

Laparoscopic Revision From Biliopancreatic Diversion to Gastric Bypass

NCT01041456
View directory record Official record
Conditions
Metabolic and Nutritional Complications, Protein Malnutrition, Intestinal Malabsorptive Syndrome, Metabolic Bone Disease
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Fresno, California
Source: ClinicalTrials.gov public record
Updated Jan 1, 2010 · Synced Oct 13, 2026, 8:09 AM EDT
Completed No phase listed Observational

Relationship Between Changes in Gut Hormones After Gastric Bypass and Gastric Banding and Improvements in Diabetes

NCT01153438
View directory record Official record
Conditions
Type 2 Diabetes, Obesity, Bariatric Surgery
Interventions
Not listed
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 17, 2016 · Synced Oct 13, 2026, 8:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Safety and Efficacy Study of Duet TRS

NCT00950872
View directory record Official record
Conditions
Roux En Y Gastric Bypass
Interventions
Duet TRS
Device
Lead sponsor
Medtronic - MITG
Industry
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated May 1, 2014 · Synced Oct 13, 2026, 8:09 AM EDT