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ClinicalTrials.gov public records Last synced Sep 30, 2026, 9:01 AM EDT

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Showing 73–96 of 453 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Bariatric Surgical Procedure Clear all
Completed Not applicable Interventional Results available

Multivitamin Adherence Following Bariatric Surgery

NCT02124889
View directory record Official record
Conditions
Obesity
Interventions
Weekly Internet surveys
Behavioral
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated May 31, 2019 · Synced Sep 30, 2026, 9:01 AM EDT
Available No phase listed Expanded access

An Expanded Access Protocol to Provide Avexitide in Patients With Post-Bariatric Hypoglycemia

NCT07582874
View directory record Official record
Conditions
Post-bariatric Hypoglycemia
Interventions
Avexitide
Drug
Lead sponsor
Amylyx Pharmaceuticals Inc.
Industry
Eligibility
18 Years and older
U.S. locations
4
States / cities
Boston, Massachusetts • Morehead City, North Carolina • Mesquite, Texas + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 14, 2026 · Synced Sep 30, 2026, 9:01 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Prospective Study of Hormone Levels After Bariatric Surgery

NCT00627315
View directory record Official record
Conditions
Obesity
Interventions
Gastric bypass, Gastric banding
Procedure
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
236 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 19, 2019 · Synced Sep 30, 2026, 9:01 AM EDT
Active, not recruiting Not applicable Interventional

Role of Dietary Habits in Efficacy of Bariatric Surgery - Study C

NCT03482986
View directory record Official record
Conditions
Bariatric Surgery, Sleeve Gastrectomy, Obesity
Interventions
Dietary habits plan
Behavioral
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
22 Years to 62 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 5, 2025 · Synced Sep 30, 2026, 9:01 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Pre-op Use of Incentive Spirometry in Obese Patients

NCT01004146
View directory record Official record
Conditions
Lung Function, Bariatric Surgery
Interventions
Incentive Spirometry
Procedure
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 3, 2014 · Synced Sep 30, 2026, 9:01 AM EDT
Completed Not applicable Interventional

Determinants of Fat Malabsorption After Roux-en-Y Gastric Bypass

NCT01252511
View directory record Official record
Conditions
Severe Obesity
Interventions
RYGB for surgical treatment of severe obesity
Procedure
Lead sponsor
Baylor Research Institute
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated May 17, 2019 · Synced Sep 30, 2026, 9:01 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 28, 2026 · Synced Sep 30, 2026, 9:01 AM EDT
Completed Phase 3 Interventional Results available

Intraoperative Lidocaine Infusion for Postoperative Pain Management in Obese Patients

NCT01944098
View directory record Official record
Conditions
Bariatric Surgical Pain
Interventions
Lidocaine, Placebo
Drug
Lead sponsor
University of South Florida
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Oct 26, 2017 · Synced Sep 30, 2026, 9:01 AM EDT
Completed Phase 2 Interventional Results available

Qsymia as an Adjunct to Surgical Therapy in the Superobese

NCT02301416
View directory record Official record
Conditions
Obesity, Metabolic Surgery, Weight Loss, Bariatric Surgery Procedures
Interventions
Phentermine/topiramate, low calorie diet
Drug · Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 70 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 4, 2019 · Synced Sep 30, 2026, 9:01 AM EDT
Completed Phase 2 Interventional Results available

Apnea, Bariatric Surgery Versus Continuous Positive Airway Pressure (CPAP) Trial

NCT01187771
View directory record Official record
Conditions
Obstructive Sleep Apnea, Obesity
Interventions
Laparoscopic Gastric Banding, Continuous Positive Airway Pressure
Procedure
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 65 Years
Enrollment
53 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 4, 2019 · Synced Sep 30, 2026, 9:01 AM EDT
Completed No phase listed Observational Results available

Taste Perception Pre and Post Bariatric Surgery

NCT01536197
View directory record Official record
Conditions
Morbid Obesity
Interventions
Gastric bypass, Gastric banding, Sleeve gastrectomy
Procedure
Lead sponsor
Washington University School of Medicine
Other
Eligibility
20 Years to 70 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 18, 2017 · Synced Sep 30, 2026, 9:01 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers Results available

Positive Psychology Intervention for Patients Post-bariatric Surgery and Their Partners

NCT05958615
View directory record Official record
Conditions
Obesity, Morbid
Interventions
Reimagining Us in the Context of Bariatric Surgery (ReConnect)
Behavioral
Lead sponsor
Larissa McGarrity, Ph.D.
Other
Eligibility
18 Years and older
Enrollment
82 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Sep 30, 2026, 9:01 AM EDT
Completed Phase 4 Interventional Results available

Apixaban Pharmacokinetics in Bariatric Patients (APB)

NCT02406885
View directory record Official record
Conditions
Bariatric Surgery, Obesity
Interventions
Apixaban
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 65 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 22, 2020 · Synced Sep 30, 2026, 9:01 AM EDT
Active, not recruiting Phase 4 Interventional

Glucagon Dose-Response in Patients With Post-Bariatric Hypoglycemia

NCT06986603
View directory record Official record
Conditions
Hypoglycemia, Hypoglycemia, Reactive, Bariatric Surgery
Interventions
Glucagon for Injection (Fresenius Kabi USA)
Drug
Lead sponsor
Joslin Diabetes Center
Other
Eligibility
18 Years to 70 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
2
States / cities
Birmingham, Alabama • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 6, 2026 · Synced Sep 30, 2026, 9:01 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Improving Diabetes After Bariatric Surgery

NCT00676923
View directory record Official record
Conditions
Obesity, Diabetes
Interventions
Not listed
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
63 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
5
States / cities
Portland, Oregon • Pittsburgh, Pennsylvania • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Nov 14, 2012 · Synced Sep 30, 2026, 9:01 AM EDT
Completed Phase 1 Interventional

Antibiotics, Gastric Bypass, and the Microbiome

NCT05367479
View directory record Official record
Conditions
Obesity, Morbid, Hypertension, Bariatric Surgery Candidate
Interventions
Antibiotic
Drug
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years to 70 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 10, 2022 · Synced Sep 30, 2026, 9:01 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Biomarkers of Liver Pathology in Patients With Presumed Non-Alcoholic Steatohepatitis Following Bariatric Surgery

NCT03294850
View directory record Official record
Conditions
NASH - Nonalcoholic Steatohepatitis; NAFLD - Nonalcoholic Fatty Liver Disease
Interventions
Bariatric surgery, HepQuant SHUNT Dual Cholate Liver Diagnostic Kit
Procedure · Device
Lead sponsor
AdventHealth Translational Research Institute
Other
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Jul 16, 2021 · Synced Sep 30, 2026, 9:01 AM EDT
Withdrawn No phase listed Observational

Adjustable Gastric Band Survey Study

NCT01041534
View directory record Official record
Conditions
Morbid Obesity
Interventions
Survey
Other
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Dec 13, 2022 · Synced Sep 30, 2026, 9:01 AM EDT
Completed No phase listed Observational Results available

Hepatic Mitochondrial Function in Youth

NCT03587727
View directory record Official record
Conditions
Hepatic Steatosis, Bariatric Surgery Candidate, Adolescent Obesity, Obesity
Interventions
Not listed
Lead sponsor
University of Colorado, Denver
Other
Eligibility
13 Years to 20 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Oct 10, 2025 · Synced Sep 30, 2026, 9:01 AM EDT
Recruiting No phase listed Observational

Chronic Widespread Pain After Rapid Weight Loss in Non-Hispanic Black and Hispanic/Latino/a/x Adults

NCT06795386
View directory record Official record
Conditions
Chronic Pain, Widespread, Obesity, Bariatric Surgery Candidate
Interventions
Bariatric Surgery
Procedure
Lead sponsor
New York University
Other
Eligibility
18 Years to 75 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
3
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 28, 2025 · Synced Sep 30, 2026, 9:01 AM EDT
Recruiting No phase listed Observational

Metabolic Responses to Bariatric Surgery

NCT02024542
View directory record Official record
Conditions
Morbid Obesity
Interventions
Surgery
Other
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 55 Years
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2035
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 18, 2026 · Synced Sep 30, 2026, 9:01 AM EDT
Completed Not applicable Interventional

Evaluation of Apnea Tolerance in Bariatric Patients Following Rapid-sequence Induction of Anesthesia

NCT03056807
View directory record Official record
Conditions
General Surgery
Interventions
25° head-up position, 55° head-up position
Other
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Feb 17, 2017 · Synced Sep 30, 2026, 9:01 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 Sep 30, 2026, 9:01 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

A Comparison of Sustained and Extended Release Bupropion Following Bariatric Surgery

NCT02173886
View directory record Official record
Conditions
Roux en Y Gastric Bypass
Interventions
Bupropion SR and XL
Drug
Lead sponsor
North Dakota State University
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Fargo, North Dakota
Source: ClinicalTrials.gov public record
Updated Sep 28, 2016 · Synced Sep 30, 2026, 9:01 AM EDT