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ClinicalTrials.gov public records Last synced Oct 2, 2026, 3:21 PM EDT

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Showing 25–48 of 49 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Phentermine/topiramate Clear all
Completed Phase 2 Interventional

Role of Pharmacotherapy in Counteracting Weight Regain in Adolescents With Severe Obesity

NCT04298203
View directory record Official record
Conditions
Obesity
Interventions
Phentermine-Topiramate, Meal Replacement Therapy, Placebo
Drug · Dietary Supplement · Other
Lead sponsor
University of Minnesota
Other
Eligibility
12 Years to 18 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated May 26, 2026 · Synced Oct 2, 2026, 3:21 PM EDT
Completed Phase 4 Interventional Results available

A Phase IV Safety and Efficacy Study of VI-0521 in Adolescents With Obesity

NCT03922945
View directory record Official record
Conditions
Adolescent Obesity, Obesity in Adolescence, Adolescent Overweight
Interventions
VI-0521 oral capsule, Placebo oral capsule, Lifestyle Modification
Drug · Behavioral
Lead sponsor
VIVUS LLC
Industry
Eligibility
12 Years to 16 Years
Enrollment
223 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Norman, Oklahoma
Source: ClinicalTrials.gov public record
Updated Sep 10, 2022 · Synced Oct 2, 2026, 3:21 PM EDT
Completed Phase 4 Interventional Results available

A Research Study Comparing Wegovy to Other Weight Management Drugs in People Living With Obesity in America

NCT05579249
View directory record Official record
Conditions
Obesity
Interventions
Semaglutide, Orlistat, Phentermine/Topiramate, Naltrexone/Bupropion, Liraglutide
Drug
Lead sponsor
Novo Nordisk A/S
Industry
Eligibility
18 Years and older
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated Jan 14, 2026 · Synced Oct 2, 2026, 3:21 PM EDT
Recruiting Phase 2 Interventional

Efficacy and Safety of Phentermine/Topiramate in Youth With Hypothalamic Obesity

NCT06299891
View directory record Official record
Conditions
Hypothalamic Obesity, Hypothalamic Tumor, Craniopharyngioma
Interventions
Phentermine / Topiramate Extended Release Oral Capsule [Qsymia], Placebo
Drug · Other
Lead sponsor
Seattle Children's Hospital
Other
Eligibility
6 Years to 28 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
2
States / cities
Philadelphia, Pennsylvania • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 28, 2025 · Synced Oct 2, 2026, 3:21 PM EDT
Recruiting Phase 2 Interventional

Pharmacologic Weight Loss as Adjunct Therapy for Ulcerative Colitis in Obese Patients

NCT04721873
View directory record Official record
Conditions
Colitis, Ulcerative, Obesity
Interventions
Phentermine-Topiramate, Placebo
Drug
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 80 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated May 16, 2023 · Synced Oct 2, 2026, 3:21 PM EDT
Completed Phase 3 Interventional Results available

Study of VI-0521 Compared to Placebo in Treatment of Diabetes and Obesity in Adults With Obesity-Related Co-Morbid Conditions

NCT00553787
View directory record Official record
Conditions
Obesity, Type 2 Diabetes
Interventions
VI-0521
Drug
Lead sponsor
VIVUS LLC
Industry
Eligibility
18 Years to 70 Years
Enrollment
2,487 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
6
States / cities
Birmingham, Alabama • Ridgefield, Connecticut • New York, New York + 3 more
Source: ClinicalTrials.gov public record
Updated Sep 10, 2012 · Synced Oct 2, 2026, 3:21 PM EDT
Active, not recruiting Phase 4 Interventional

Sequential Therapy Anti-obesitY Medication With Muscle Preservation for Weight Loss and MaintEnance: A PragmAtic Randomized CoNtrolled Trial (STAY-LEAN Trial)

NCT06854614
View directory record Official record
Conditions
Obesity
Interventions
Comprehensive weight loss, Enhanced lifestyle changes, Tirzepatide, Naltrexone-Bupropion, Phentermine-Topiramate, Semaglutide (Wegovy®)
Other · Drug
Lead sponsor
The Cleveland Clinic
Other
Eligibility
25 Years to 65 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 30, 2026 · Synced Oct 2, 2026, 3:21 PM 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 Oct 2, 2026, 3:21 PM EDT
Completed Phase 3 Interventional Results available

Individualized Obesity Pharmacotherapy

NCT03374956
View directory record Official record
Conditions
Obesity
Interventions
Phentermine-Topiramate, Liraglutide, Naltrexone/bupropion, Phentermine
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 75 Years
Enrollment
193 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 18, 2023 · Synced Oct 2, 2026, 3:21 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Evaluate the Pharmacokinetics of VI-0521 in Subjects With Hepatic Impairment

NCT00768209
View directory record Official record
Conditions
Hepatic Impairment
Interventions
Phentermine and Topiramate
Drug
Lead sponsor
VIVUS LLC
Industry
Eligibility
18 Years to 65 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
2
States / cities
Miami, Florida • Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Dec 1, 2009 · Synced Oct 2, 2026, 3:21 PM EDT
Active, not recruiting No phase listed Observational

Using Secondary Data to Evaluate Sex-based Heterogeneity of GLP-1 Agonists and SGLT2 Inhibitors on Cardiovascular-Kidney-Metabolic Health (CKMH) Outcomes in Real-world Settings (DASH-CKMH)

NCT07188545
View directory record Official record
Conditions
Cardiovascular Kidney Metabolic Syndrome
Interventions
Intervention, Active Comparator
Drug
Lead sponsor
Ohio State University
Other
Eligibility
18 Years and older
Enrollment
23,280,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 23, 2025 · Synced Oct 2, 2026, 3:21 PM EDT
Completed Phase 4 Interventional Results available

A Pharmacokinetic Study Comparing VI-0521 With Placebo in Obese Adolescents

NCT02714062
View directory record Official record
Conditions
Pediatric Obesity, Childhood Obesity
Interventions
Placebo, VI-0521 Mid Dose, VI-0521 Top Dose
Drug
Lead sponsor
VIVUS LLC
Industry
Eligibility
12 Years to 17 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016
U.S. locations
4
States / cities
Baton Rouge, Louisiana • Marrero, Louisiana • Cincinnati, Ohio + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 23, 2022 · Synced Oct 2, 2026, 3:21 PM EDT
Completed Phase 2 Interventional Results available

Adjunct Phentermine + Topiramate After Bariatric Surgery in 12-24 Year Olds

NCT04095104
View directory record Official record
Conditions
Obesity, Morbid, Bariatric Surgery, Adolescent, Young Adult, Drug Therapy
Interventions
Phentermine, Immediate Release Topiramate, Placebo for Phentermine, Placebo for Immediate Release Topiramate
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
12 Years to 24 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated May 23, 2025 · Synced Oct 2, 2026, 3:21 PM EDT
Active, not recruiting No phase listed Observational

Weight Loss Management in Endometrial Cancer Survivors

NCT06877572
View directory record Official record
Conditions
Endometrial Cancer Survivors, Weight Management, Early Stage Endometrial Cancer
Interventions
Weight loss with pharmacotherapy, Weight loss without pharmacotherapy
Behavioral
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2030
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Oct 2, 2026, 3:21 PM EDT
Completed Phase 4 Interventional Results available

A Study of VI-0521 on Ambulatory Blood Pressure (ABPM) in Overweight or Obese Subjects

NCT05215418
View directory record Official record
Conditions
Blood Pressure
Interventions
VI-0521, Phentermine, Placebo
Drug
Lead sponsor
VIVUS LLC
Industry
Eligibility
18 Years to 75 Years
Enrollment
565 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
28
States / cities
Anniston, Alabama • Mobile, Alabama • Lincoln, California + 25 more
Source: ClinicalTrials.gov public record
Updated Jul 17, 2024 · Synced Oct 2, 2026, 3:21 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Drug Interaction Study of VI-0521 With Metformin, Sitagliptan and Probenecid in Healthy Subjects.

NCT00842400
View directory record Official record
Conditions
Obesity
Interventions
Metformin, VI-0521, Sitagliptan, Probenecid
Drug
Lead sponsor
VIVUS LLC
Industry
Eligibility
19 Years to 45 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Jan 21, 2010 · Synced Oct 2, 2026, 3:21 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Peripheral Pharmacodynamics of Phentermine-Topiramate in Obese Patients

NCT01834404
View directory record Official record
Conditions
Obesity
Interventions
Phentermine-Topiramate ER, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 23, 2015 · Synced Oct 2, 2026, 3:21 PM EDT
Terminated Phase 2 Interventional Results available

Open-Label Study to Evaluate the Long-Term Safety and Efficacy of VI-0521 in Type 2 Diabetic Adults

NCT00737633
View directory record Official record
Conditions
Diabetes
Interventions
VI-0521
Drug
Lead sponsor
VIVUS LLC
Industry
Eligibility
19 Years to 70 Years
Enrollment
101 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
9
States / cities
Birmingham, Alabama • Los Angeles, California • San Francisco, California + 6 more
Source: ClinicalTrials.gov public record
Updated Sep 10, 2012 · Synced Oct 2, 2026, 3:21 PM EDT
Terminated Phase 4 Interventional Results available

EMI-EHP Weight Management and Type 2 Diabetes Pragmatic Trial

NCT04531176
View directory record Official record
Conditions
Type 2 Diabetes, Obesity
Interventions
Weight Management Program (WMP), Traditional care, Phentermine / Topiramate Extended Release Oral Capsule, naltrexone/bupropion extended-release, liraglutide 3.0 mg, Orlistat
Other · Drug
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 75 Years
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 19, 2024 · Synced Oct 2, 2026, 3:21 PM EDT
Completed Phase 2 Interventional Results available

Phentermine/Topiramate for Uric Acid Stones

NCT04621929
View directory record Official record
Conditions
Obesity, Uric Acid Stones, Type 2 Diabetes Mellitus in Obese, Pre-Diabetes
Interventions
Phentermine / Topiramate Oral Product, Citrate Salts, Allopurinol, Diet
Drug · Combination Product
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 75 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Oct 2, 2026, 3:21 PM EDT
Withdrawn Phase 2 Interventional Accepts healthy volunteers

Phentermine/Topiramate as Preventive Pharmacotherapy for Obesity

NCT05834062
View directory record Official record
Conditions
Obesity, Adolescent
Interventions
Qsymia and lifestyle management therapy, Placebo and lifestyle management therapy
Drug · Behavioral
Lead sponsor
University of Minnesota
Other
Eligibility
16 Years to 22 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 26, 2023 · Synced Oct 2, 2026, 3:21 PM EDT
Completed Phase 2 Interventional Results available

SMART Use of Medication for the Treatment of Adolescent Severe Obesity

NCT04007393
View directory record Official record
Conditions
Adolescent Obesity
Interventions
Lifestyle Modification Therapy (LSMT), Phentermine Pill, Topiramate Pill, Placebo
Behavioral · Drug
Lead sponsor
University of Minnesota
Other
Eligibility
12 Years to 17 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Oct 2, 2026, 3:21 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Anti-Obesity Phentermine-Topiramate Extended Release Pharmacotherapy vs Placebo Among Patients Using a Wearable Activity Tracker

NCT04408586
View directory record Official record
Conditions
Obesity
Interventions
Phentermine-Topiramate Extended Release, Placebo, Online support system
Drug · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 75 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 22, 2023 · Synced Oct 2, 2026, 3:21 PM EDT
Active, not recruiting Early Phase 1 Interventional Results available

Phentermine/Topiramate in Adolescents With Type 2 Diabetes and Obesity

NCT04881799
View directory record Official record
Conditions
Pediatric Obesity
Interventions
Phentermine/Topiramate (Qsymia), Placebo
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
12 Years to 20 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated May 22, 2026 · Synced Oct 2, 2026, 3:21 PM EDT