Independent directory Public ClinicalTrials.gov records United States
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ClinicalTrials.gov public records Last synced Sep 26, 2026, 11:07 AM EDT

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Showing 1–24 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
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
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
Completed Phase 4 Interventional Results available

Lifestyle Modification and Liraglutide

NCT02911818
Conditions
Obesity
Interventions
CMS-recommended lifestyle counseling, Liraglutide 3.0mg, Portion-Controlled Diet, Placebo Oral Tablet, Phentermine 15 MG, Extension Study CMS-recommended lifestyle counseling
Behavioral · Drug · Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
21 Years to 70 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Conditions
Obesity
Interventions
Canagliflozin, Phentermine, Matching Placebo to Canagliflozin, Matching Placebo to Phentermine
Drug
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
18 Years to 65 Years
Enrollment
335 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
17
States / cities
Phoenix, Arizona • Walnut Creek, California • Jacksonville, Florida + 14 more
Conditions
Obesity, Obesity; Drug, Lifestyle, Healthy
Interventions
Online Lifestyle Behavioral Therapy, Phentermine Hydrochloride 8 MG
Behavioral · Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 70 Years
Enrollment
870 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
4
States / cities
Los Angeles, California • Saint Louis Park, Minnesota • Winston-Salem, North Carolina + 1 more
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Study of Human Non-Shivering Thermogenesis and Basal Metabolic Rate

NCT01950520
Conditions
Healthy Volunteers
Interventions
Propranolol, Pindolol, Dantrolene, Magnesium Sulfate, Caffeine, Qsymia, Topiramate, Phentermine, Naltrexone, Mirabegron 50mg, Mirabegron 200mg, Placebo Cohort 1, Placebo Cohort 2, Placebo for Mirabegron
Drug · Behavioral
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 35 Years · Male only
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2024
U.S. locations
1
States / cities
Bethesda, Maryland
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
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
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
Conditions
Weight Loss, Obesity, Childhood, Obesity
Interventions
Lomaira 8Mg Tablet
Drug
Lead sponsor
Loma Linda University
Other
Eligibility
12 Months to 75 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
2
States / cities
Loma Linda, California
Conditions
Obesity
Interventions
Behavioral Treatment, Placebo, Phentermine 15 MG
Behavioral · Drug
Lead sponsor
University of Pennsylvania
Other
Eligibility
21 Years to 70 Years
Enrollment
147 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Conditions
Sleep Apnea
Interventions
VI-0521, placebo
Drug
Lead sponsor
VIVUS LLC
Industry
Eligibility
30 Years to 65 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Louisville, Kentucky
Completed Phase 1 Interventional Accepts healthy volunteers

Topiramate-Phentermine Combinations for Cocaine Dependence

NCT02239913
Conditions
Cocaine Use Disorder
Interventions
Cocaine, Placebo, Phentermine, Topiramate
Drug
Lead sponsor
University of Kentucky
Other
Eligibility
18 Years to 55 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2019
U.S. locations
1
States / cities
Lexington, Kentucky
Conditions
Binge Eating Disorder, Bulimia Nervosa
Interventions
Phentermine/Topiramate-First, Placebo
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 60 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Stanford, California
Conditions
Childhood Obesity
Interventions
Phentermine, Placebo
Drug
Lead sponsor
Russell McCulloh, MD
Network
Eligibility
12 Years to 17 Years
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
6
States / cities
Baton Rouge, Louisiana • Kansas City, Missouri • Lebanon, New Hampshire + 3 more
Conditions
Obesity
Interventions
Topiramate, Phentermine, Placebo
Drug
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years to 70 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
1
States / cities
Orange, California
Completed Phase 4 Interventional Results available

Studying the Effects of Phentermine on Eating Behavior

NCT01886937
Conditions
Obesity
Interventions
Phentermine, placebo
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
18 Years to 60 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
New York, New York
Conditions
Obesity
Interventions
VI-0521, topiramate, phentermine
Drug
Lead sponsor
VIVUS LLC
Industry
Eligibility
18 Years to 70 Years
Enrollment
756 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
2
States / cities
Durham, North Carolina • Philadelphia, Pennsylvania
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
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Peripheral Pharmacodynamics of Phentermine-Topiramate in Obese Patients

NCT01834404
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
Active, not recruiting Early Phase 1 Interventional Results available

Phentermine/Topiramate in Adolescents With Type 2 Diabetes and Obesity

NCT04881799
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
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
Withdrawn Phase 2 Interventional Accepts healthy volunteers

Phentermine/Topiramate as Preventive Pharmacotherapy for Obesity

NCT05834062
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
Conditions
Overweight, Obesity
Interventions
VI-0521, Placebo, Alcohol, alcohol placebo
Drug · Other
Lead sponsor
VIVUS LLC
Industry
Eligibility
21 Years to 45 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Lincoln, Nebraska