{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Phentermine%2FTopiramate+%28Qsymia%29",
    "query": {
      "intervention": "Phentermine/Topiramate (Qsymia)"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 39,
    "total_pages": 4,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Phentermine%2FTopiramate+%28Qsymia%29&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-10-09T02:35:06.204Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT04408586",
      "title": "Anti-Obesity Phentermine-Topiramate Extended Release Pharmacotherapy vs Placebo Among Patients Using a Wearable Activity Tracker",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Phentermine-Topiramate Extended Release",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Online support system",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 80,
      "start_date": "2020-06-03",
      "completion_date": "2022-10-11",
      "has_results": true,
      "last_update_posted_date": "2023-06-22",
      "last_synced_at": "2026-10-09T02:35:06.204Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04408586"
    },
    {
      "nct_id": "NCT00745251",
      "title": "A Study of VI-0521 for the Treatment of Obstructive Sleep Apnea / Hypopnea Syndrome in Obese Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Sleep Apnea"
      ],
      "interventions": [
        {
          "name": "VI-0521",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "VIVUS LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "30 Years to 65 Years"
      },
      "enrollment_count": 45,
      "start_date": "2008-08",
      "completion_date": "2009-12",
      "has_results": true,
      "last_update_posted_date": "2012-10-05",
      "last_synced_at": "2026-10-09T02:35:06.204Z",
      "location_count": 1,
      "location_summary": "Louisville, Kentucky",
      "locations": [
        {
          "city": "Louisville",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00745251"
    },
    {
      "nct_id": "NCT01922934",
      "title": "A Toolbox Approach to Obesity Treatment in Primary Care",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Commercial weight loss program",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Colorado Weigh",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Meal replacements",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Obesity pharmacotherapy",
          "type": "DRUG"
        },
        {
          "name": "Recreation center passes",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "DIETARY_SUPPLEMENT",
        "DRUG"
      ],
      "sponsor": "Denver Health and Hospital Authority",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 4730,
      "start_date": "2014-01",
      "completion_date": "2016-08",
      "has_results": true,
      "last_update_posted_date": "2017-08-18",
      "last_synced_at": "2026-10-09T02:35:06.204Z",
      "location_count": 1,
      "location_summary": "Denver, Colorado",
      "locations": [
        {
          "city": "Denver",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01922934"
    },
    {
      "nct_id": "NCT03799198",
      "title": "Real World Effectiveness of Combining an Employer-based Weight Management Program With Medication for Chronic Weight Management in Employees With Obesity",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Weight Management Program (WMP)",
          "type": "OTHER"
        },
        {
          "name": "Medication for chronic weight management (Rx)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DRUG"
      ],
      "sponsor": "Novo Nordisk A/S",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 200,
      "start_date": "2019-01-07",
      "completion_date": "2020-05-22",
      "has_results": true,
      "last_update_posted_date": "2022-11-14",
      "last_synced_at": "2026-10-09T02:35:06.204Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03799198"
    },
    {
      "nct_id": "NCT03374956",
      "title": "Individualized Obesity Pharmacotherapy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Phentermine-Topiramate",
          "type": "DRUG"
        },
        {
          "name": "Liraglutide",
          "type": "DRUG"
        },
        {
          "name": "Naltrexone/bupropion",
          "type": "DRUG"
        },
        {
          "name": "Phentermine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 193,
      "start_date": "2017-12-11",
      "completion_date": "2022-05-26",
      "has_results": true,
      "last_update_posted_date": "2023-07-18",
      "last_synced_at": "2026-10-09T02:35:06.204Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03374956"
    },
    {
      "nct_id": "NCT02229214",
      "title": "Effect of VI-0521 (Qsymia®) on Glomerular Filtration Rate (GFR) in Overweight or Obese Healthy Subjects",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Qsymia",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "VIVUS LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 51,
      "start_date": "2014-08",
      "completion_date": "2014-11",
      "has_results": true,
      "last_update_posted_date": "2017-11-07",
      "last_synced_at": "2026-10-09T02:35:06.204Z",
      "location_count": 1,
      "location_summary": "Lakewood, Colorado",
      "locations": [
        {
          "city": "Lakewood",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02229214"
    },
    {
      "nct_id": "NCT05756764",
      "title": "Anti-obesity Pharmacotherapy and Inflammation",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Semaglutide",
          "type": "DRUG"
        },
        {
          "name": "Phentermine-Topiramate combination",
          "type": "DRUG"
        },
        {
          "name": "Phentermine",
          "type": "DRUG"
        },
        {
          "name": "Tirzepatide",
          "type": "DRUG"
        },
        {
          "name": "Topiramate",
          "type": "DRUG"
        },
        {
          "name": "Diethylpropion",
          "type": "DRUG"
        },
        {
          "name": "Naltrexone/Bupropion",
          "type": "DRUG"
        },
        {
          "name": "Liraglutide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Louisiana State University Health Sciences Center in New Orleans",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "35 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "35 Years to 60 Years"
      },
      "enrollment_count": 30,
      "start_date": "2023-06-01",
      "completion_date": "2026-02-20",
      "has_results": false,
      "last_update_posted_date": "2025-09-09",
      "last_synced_at": "2026-10-09T02:35:06.204Z",
      "location_count": 2,
      "location_summary": "New Orleans, Louisiana",
      "locations": [
        {
          "city": "New Orleans",
          "state": "Louisiana"
        },
        {
          "city": "New Orleans",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05756764"
    },
    {
      "nct_id": "NCT01087736",
      "title": "Topiramate Treatment of Alcohol Use Disorders in Veterans With Post Traumatic Stress Disorder (PTSD): A Pilot Controlled Trial of Augmentation Therapy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "PTSD",
        "Alcohol Abuse",
        "Alcoholism"
      ],
      "interventions": [
        {
          "name": "Topiramate",
          "type": "DRUG"
        },
        {
          "name": "Placebo administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 30,
      "start_date": "2010-04",
      "completion_date": "2013-12",
      "has_results": true,
      "last_update_posted_date": "2014-06-03",
      "last_synced_at": "2026-10-09T02:35:06.204Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01087736"
    },
    {
      "nct_id": "NCT00554216",
      "title": "Study of VI-0521 Compared to Placebo in Treatment of Obesity in Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Obesity"
      ],
      "interventions": [
        {
          "name": "VI-0521",
          "type": "DRUG"
        },
        {
          "name": "Placebo matched phentermine/topiramate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "VIVUS LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 1267,
      "start_date": "2007-11",
      "completion_date": "2009-05",
      "has_results": true,
      "last_update_posted_date": "2012-09-10",
      "last_synced_at": "2026-10-09T02:35:06.204Z",
      "location_count": 5,
      "location_summary": "San Diego, California • Ridgefield, Connecticut • Durham, North Carolina + 2 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Ridgefield",
          "state": "Connecticut"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        },
        {
          "city": "Toledo",
          "state": "Ohio"
        },
        {
          "city": "Austin",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00554216"
    },
    {
      "nct_id": "NCT04531176",
      "title": "EMI-EHP Weight Management and Type 2 Diabetes Pragmatic Trial",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Type 2 Diabetes",
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Weight Management Program (WMP)",
          "type": "OTHER"
        },
        {
          "name": "Traditional care",
          "type": "OTHER"
        },
        {
          "name": "Phentermine / Topiramate Extended Release Oral Capsule",
          "type": "DRUG"
        },
        {
          "name": "naltrexone/bupropion extended-release",
          "type": "DRUG"
        },
        {
          "name": "liraglutide 3.0 mg",
          "type": "DRUG"
        },
        {
          "name": "Orlistat",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DRUG"
      ],
      "sponsor": "The Cleveland Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 74,
      "start_date": "2020-09-01",
      "completion_date": "2023-08-04",
      "has_results": true,
      "last_update_posted_date": "2024-09-19",
      "last_synced_at": "2026-10-09T02:35:06.204Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04531176"
    }
  ]
}