{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=allopurinol+200+mg",
    "query": {
      "intervention": "allopurinol 200 mg"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 28,
    "total_pages": 3,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=allopurinol+200+mg&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-29T02:33:52.612Z",
  "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": "NCT01493531",
      "title": "Combining Lesinurad With Allopurinol in Inadequate Responders",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Gout"
      ],
      "interventions": [
        {
          "name": "Lesinurad",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Allopurinol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Ardea Biosciences, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 610,
      "start_date": "2011-12",
      "completion_date": "2014-07",
      "has_results": true,
      "last_update_posted_date": "2016-05-26",
      "last_synced_at": "2026-09-29T02:33:52.612Z",
      "location_count": 88,
      "location_summary": "Mobile, Alabama • Chandler, Arizona • Mesa, Arizona + 76 more",
      "locations": [
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Pheonix",
          "state": "Arizona"
        },
        {
          "city": "Jonesboro",
          "state": "Arkansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01493531"
    },
    {
      "nct_id": "NCT01988402",
      "title": "Does Allopurinol Prolong a Treated, Acute Gout Flare?",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Gout"
      ],
      "interventions": [
        {
          "name": "allopurinol",
          "type": "DRUG"
        },
        {
          "name": "Placebo (sugar pill)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "59th Medical Wing",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 35,
      "start_date": "2007-12",
      "completion_date": "2013-06",
      "has_results": true,
      "last_update_posted_date": "2018-02-14",
      "last_synced_at": "2026-09-29T02:33:52.612Z",
      "location_count": 1,
      "location_summary": "Lackland Air Force Base, Texas",
      "locations": [
        {
          "city": "Lackland Air Force Base",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01988402"
    },
    {
      "nct_id": "NCT00430248",
      "title": "Efficacy and Safety of Oral Febuxostat in Participants With Gout",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Gout"
      ],
      "interventions": [
        {
          "name": "Febuxostat",
          "type": "DRUG"
        },
        {
          "name": "Allopurinol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Takeda",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 2269,
      "start_date": "2007-02",
      "completion_date": "2008-03",
      "has_results": true,
      "last_update_posted_date": "2012-02-02",
      "last_synced_at": "2026-09-29T02:33:52.612Z",
      "location_count": 258,
      "location_summary": "Birmingham, Alabama • Hoover, Alabama • Hueytown, Alabama + 255 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Hoover",
          "state": "Alabama"
        },
        {
          "city": "Hueytown",
          "state": "Alabama"
        },
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00430248"
    },
    {
      "nct_id": "NCT00819585",
      "title": "A Study of the Efficacy of Canakinumab in Prevention of Acute Flares in Chronic Gout Patients Initiating Allopurinol Therapy (Core Study) and a Long-term Study of the Efficacy and Safety of Canakinumab in Patients With Gout (Extension Study)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Gout"
      ],
      "interventions": [
        {
          "name": "Canakinumab",
          "type": "DRUG"
        },
        {
          "name": "Colchicine",
          "type": "DRUG"
        },
        {
          "name": "Allopurinol",
          "type": "DRUG"
        },
        {
          "name": "Placebo Matching Canakinumab",
          "type": "DRUG"
        },
        {
          "name": "Placebo Matching Colchicine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Novartis Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 432,
      "start_date": "2008-12",
      "completion_date": "2010-08",
      "has_results": true,
      "last_update_posted_date": "2018-07-17",
      "last_synced_at": "2026-09-29T02:33:52.612Z",
      "location_count": 19,
      "location_summary": "Huntington Beach, California • San Diego, California • Jupiter, Florida + 16 more",
      "locations": [
        {
          "city": "Huntington Beach",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Jupiter",
          "state": "Florida"
        },
        {
          "city": "Honolulu",
          "state": "Hawaii"
        },
        {
          "city": "Overland Park",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00819585"
    },
    {
      "nct_id": "NCT03226899",
      "title": "A Phase 4 Safety and Efficacy Study to Evaluate Lesinurad 200 mg in Participants With Gout and Renal Impairment",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Gout",
        "Chronic Kidney Disease (CKD)"
      ],
      "interventions": [
        {
          "name": "Lesinurad",
          "type": "DRUG"
        },
        {
          "name": "XOI",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "colchicine",
          "type": "DRUG"
        },
        {
          "name": "corticosteroids",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Ironwood Pharmaceuticals, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 242,
      "start_date": "2017-07-19",
      "completion_date": "2019-02-25",
      "has_results": true,
      "last_update_posted_date": "2021-11-04",
      "last_synced_at": "2026-09-29T02:33:52.612Z",
      "location_count": 70,
      "location_summary": "Birmingham, Alabama • Tucson, Arizona • Covina, California + 59 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Covina",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03226899"
    },
    {
      "nct_id": "NCT05805605",
      "title": "Allo HSCT Using RIC and PTCy for Hematological Diseases",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Acute Myelogenous Leukemia",
        "Acute Lymphocytic Leukemia",
        "Biphenotypic Acute Leukemia",
        "Undifferentiated Leukemia",
        "Prolymphocytic Leukemia",
        "Chronic Myelogenous Leukemia",
        "Plasma Cell Leukemia",
        "Myelodysplastic Syndromes",
        "Leukemia, Myeloid",
        "Myelodysplastic Syndrome With Excess Blasts-1",
        "Burkitt Lymphoma",
        "Relapsed T-Cell Lymphoma",
        "Relapsed Chronic Lymphocytic Leukemia",
        "Small Lymphocytic Lymphoma",
        "Marginal Zone Lymphoma",
        "Follicular Lymphoma",
        "Myeloproliferative Neoplasm",
        "Myelofibrosis"
      ],
      "interventions": [
        {
          "name": "Peripheral Blood Stem Cell Transplant",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Allopurinol 300 MG",
          "type": "DRUG"
        },
        {
          "name": "Fludarabine",
          "type": "DRUG"
        },
        {
          "name": "Cyclophosphamide",
          "type": "DRUG"
        },
        {
          "name": "Bone Marrow Cell Transplant",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Total Body Irradiation",
          "type": "RADIATION"
        },
        {
          "name": "Sirolimus Pill",
          "type": "DRUG"
        },
        {
          "name": "Mycophenolate Mofetil",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DRUG",
        "RADIATION"
      ],
      "sponsor": "Masonic Cancer Center, University of Minnesota",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "Up to 75 Years"
      },
      "enrollment_count": 56,
      "start_date": "2023-05-01",
      "completion_date": "2028-10-22",
      "has_results": false,
      "last_update_posted_date": "2026-07-06",
      "last_synced_at": "2026-09-29T02:33:52.612Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05805605"
    },
    {
      "nct_id": "NCT02581553",
      "title": "Lesinurad/Allopurinol 200/300 FDC Tablets Bioavailability",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "lesinurad/allopurinol 200/300 FDC tablets",
          "type": "DRUG"
        },
        {
          "name": "lesinurad 200 mg",
          "type": "DRUG"
        },
        {
          "name": "allopurinol 300 mg",
          "type": "DRUG"
        },
        {
          "name": "lesinurad/allopurinol 200/200 FDC tablets",
          "type": "DRUG"
        },
        {
          "name": "allopurinol 200 mg",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Ardea Biosciences, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "MALE",
        "summary": "18 Years to 65 Years · Male only"
      },
      "enrollment_count": 116,
      "start_date": "2015-10",
      "completion_date": "2016-08",
      "has_results": false,
      "last_update_posted_date": "2016-12-19",
      "last_synced_at": "2026-09-29T02:33:52.612Z",
      "location_count": 1,
      "location_summary": "Austin, Texas",
      "locations": [
        {
          "city": "Austin",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02581553"
    },
    {
      "nct_id": "NCT03570983",
      "title": "A Trial Comparing Single Agent Melphalan to Carmustine, Etoposide, Cytarabine, and Melphalan (BEAM) as a Preparative Regimen for Patients With Multiple Myeloma Undergoing High Dose Therapy Followed by Autologous Stem Cell Reinfusion",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Multiple Myeloma"
      ],
      "interventions": [
        {
          "name": "Allopurinol",
          "type": "DRUG"
        },
        {
          "name": "Carmustine",
          "type": "DRUG"
        },
        {
          "name": "Etoposide",
          "type": "DRUG"
        },
        {
          "name": "Cytarabine",
          "type": "DRUG"
        },
        {
          "name": "Melphalan",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Swedish Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 100,
      "start_date": "2018-09-05",
      "completion_date": "2024-12",
      "has_results": false,
      "last_update_posted_date": "2022-06-22",
      "last_synced_at": "2026-09-29T02:33:52.612Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03570983"
    },
    {
      "nct_id": "NCT02661035",
      "title": "Allo HSCT Using RIC for Hematological Diseases",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Acute Myelogenous Leukemia",
        "Acute Lymphocytic Leukemia",
        "Chronic Myelogenous Leukemia",
        "Plasma Cell Leukemia",
        "Myelodysplastic Syndromes",
        "Chronic Lymphocytic Leukemia",
        "Small Lymphocytic Lymphoma",
        "B-Cell Lymphoma",
        "Follicular Lymphoma",
        "Lymphoplasmacytic Lymphoma",
        "Mantle-Cell Lymphoma",
        "Prolymphocytic Leukemia",
        "Lymphoblastic Lymphoma",
        "Burkitt's Lymphoma",
        "Non-Hodgkin's Lymphoma",
        "Multiple Myeloma",
        "Myeloproliferative Syndromes",
        "Hematological Diseases"
      ],
      "interventions": [
        {
          "name": "Allopurinol",
          "type": "DRUG"
        },
        {
          "name": "Fludarabine",
          "type": "DRUG"
        },
        {
          "name": "Cyclophosphamide",
          "type": "DRUG"
        },
        {
          "name": "ATG",
          "type": "DRUG"
        },
        {
          "name": "TBI",
          "type": "RADIATION"
        },
        {
          "name": "Tacrolimus",
          "type": "DRUG"
        },
        {
          "name": "MMF",
          "type": "DRUG"
        },
        {
          "name": "Peripheral Blood Stem Cells",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Related or Unrelated Bone Marrow Cells",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "DRUG",
        "RADIATION",
        "BIOLOGICAL"
      ],
      "sponsor": "Masonic Cancer Center, University of Minnesota",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "Up to 75 Years"
      },
      "enrollment_count": 156,
      "start_date": "2017-03-09",
      "completion_date": "2023-05-29",
      "has_results": false,
      "last_update_posted_date": "2023-09-21",
      "last_synced_at": "2026-09-29T02:33:52.612Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02661035"
    },
    {
      "nct_id": "NCT01101035",
      "title": "Cardiovascular Safety of Febuxostat and Allopurinol in Participants With Gout and Cardiovascular Comorbidities (CARES)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Cardiovascular Disease"
      ],
      "interventions": [
        {
          "name": "Febuxostat",
          "type": "DRUG"
        },
        {
          "name": "Allopurinol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Takeda",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 6198,
      "start_date": "2010-04-23",
      "completion_date": "2017-07-18",
      "has_results": true,
      "last_update_posted_date": "2018-06-14",
      "last_synced_at": "2026-09-29T02:33:52.612Z",
      "location_count": 202,
      "location_summary": "Decatur, Georgia • Dunwoody, Georgia • Marietta, Georgia + 199 more",
      "locations": [
        {
          "city": "Decatur",
          "state": "Georgia"
        },
        {
          "city": "Dunwoody",
          "state": "Georgia"
        },
        {
          "city": "Marietta",
          "state": "Georgia"
        },
        {
          "city": "Norcross",
          "state": "Georgia"
        },
        {
          "city": "Roswell",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01101035"
    }
  ]
}