{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=phentermine",
    "query": {
      "intervention": "phentermine"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 66,
    "total_pages": 7,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=phentermine&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-02T21:46:52.973Z",
  "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": "NCT01970566",
      "title": "Comparison of the Effect of Intense-Exercise/Moderate-Calorie, Topiramate-Phentermine and Cognitive Behavioral Therapy on Obesity",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obesity",
        "Diabetes Mellitus"
      ],
      "interventions": [
        {
          "name": "Behavioral and Drug",
          "type": "OTHER"
        },
        {
          "name": "Behavioral",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "US Department of Veterans Affairs",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "20 Years to 70 Years"
      },
      "enrollment_count": 0,
      "start_date": "2013-11",
      "completion_date": "2017-11",
      "has_results": false,
      "last_update_posted_date": "2014-01-15",
      "last_synced_at": "2026-09-02T21:46:52.973Z",
      "location_count": 1,
      "location_summary": "North Chicago, Illinois",
      "locations": [
        {
          "city": "North Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01970566"
    },
    {
      "nct_id": "NCT02609477",
      "title": "A Study to Evaluate Abuse Potential of Istradefylline",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Drug Abuse"
      ],
      "interventions": [
        {
          "name": "Istradefylline",
          "type": "DRUG"
        },
        {
          "name": "Phentermine 45 mg",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Kyowa Kirin Co., Ltd.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "18 Years to 55 Years"
      },
      "enrollment_count": 42,
      "start_date": "2016-01",
      "completion_date": "2016-07",
      "has_results": false,
      "last_update_posted_date": "2024-04-25",
      "last_synced_at": "2026-09-02T21:46:52.973Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02609477"
    },
    {
      "nct_id": "NCT04614545",
      "title": "Comparing a Virtual vs. Face to Face Weight Management Program Using Phentermine for Patients With Overweight or Obesity",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Phentermine 37.5 Mg",
          "type": "DRUG"
        },
        {
          "name": "Dietary program",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Exercise program",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BEHAVIORAL"
      ],
      "sponsor": "The Cleveland Clinic",
      "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": 70,
      "start_date": "2021-01-01",
      "completion_date": "2022-09-29",
      "has_results": true,
      "last_update_posted_date": "2022-12-07",
      "last_synced_at": "2026-09-02T21:46:52.973Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04614545"
    },
    {
      "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": "2026-09-02T21:46:52.973Z",
      "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": "NCT07729332",
      "title": "Switching to Oral Weight Management Pharmacotherapy to Prevent Weight Regain After GLP-1 Therapy Discontinuation",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Phentermine Pill",
          "type": "DRUG"
        },
        {
          "name": "Orforglipron",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Massachusetts General Hospital",
      "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": 60,
      "start_date": "2026-11-01",
      "completion_date": "2031-07-31",
      "has_results": false,
      "last_update_posted_date": "2026-07-27",
      "last_synced_at": "2026-09-02T21:46:52.973Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07729332"
    },
    {
      "nct_id": "NCT06877572",
      "title": "Weight Loss Management in Endometrial Cancer Survivors",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Endometrial Cancer Survivors",
        "Weight Management",
        "Early Stage Endometrial Cancer"
      ],
      "interventions": [
        {
          "name": "Weight loss with pharmacotherapy",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Weight loss without pharmacotherapy",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Kansas Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 50,
      "start_date": "2025-03-25",
      "completion_date": "2030-10",
      "has_results": false,
      "last_update_posted_date": "2026-08-12",
      "last_synced_at": "2026-09-02T21:46:52.973Z",
      "location_count": 1,
      "location_summary": "Kansas City, Kansas",
      "locations": [
        {
          "city": "Kansas City",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06877572"
    },
    {
      "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": "2026-09-02T21:46:52.973Z",
      "location_count": 1,
      "location_summary": "Lakewood, Colorado",
      "locations": [
        {
          "city": "Lakewood",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02229214"
    },
    {
      "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": "2026-09-02T21:46:52.973Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03374956"
    },
    {
      "nct_id": "NCT04721873",
      "title": "Pharmacologic Weight Loss as Adjunct Therapy for Ulcerative Colitis in Obese Patients",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Colitis, Ulcerative",
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Phentermine-Topiramate",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of California, San Diego",
      "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": 40,
      "start_date": "2020-12-18",
      "completion_date": "2024-06-30",
      "has_results": false,
      "last_update_posted_date": "2023-05-16",
      "last_synced_at": "2026-09-02T21:46:52.973Z",
      "location_count": 1,
      "location_summary": "La Jolla, California",
      "locations": [
        {
          "city": "La Jolla",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04721873"
    },
    {
      "nct_id": "NCT07213466",
      "title": "Individualized Pharmacological Approach to Obesity in Patients With Bipolar Disorder",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Bipolar I Disorder",
        "Bipolar II Disorder",
        "Schizo Affective Disorder",
        "Obesity",
        "Weight Loss",
        "GLP - 1"
      ],
      "interventions": [
        {
          "name": "Group Therapy Program",
          "type": "BEHAVIORAL"
        },
        {
          "name": "semaglutide",
          "type": "DRUG"
        },
        {
          "name": "Phentermine-Topiramate",
          "type": "DRUG"
        },
        {
          "name": "naltrexone and bupropion (combination)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "DRUG"
      ],
      "sponsor": "Mayo Clinic",
      "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": 100,
      "start_date": "2026-01-19",
      "completion_date": "2029-02-01",
      "has_results": false,
      "last_update_posted_date": "2026-03-11",
      "last_synced_at": "2026-09-02T21:46:52.973Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07213466"
    }
  ]
}