{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=HCQ+Placebo",
    "query": {
      "intervention": "HCQ Placebo"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 59,
    "total_pages": 6,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=HCQ+Placebo&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-11T16:56:42.255Z",
  "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": "NCT04318444",
      "title": "Hydroxychloroquine Post Exposure Prophylaxis for Coronavirus Disease (COVID-19)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "COVID-19",
        "Corona Virus Infection"
      ],
      "interventions": [
        {
          "name": "Hydroxychloroquine",
          "type": "DRUG"
        },
        {
          "name": "Placebo oral tablet",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 10,
      "start_date": "2020-03-29",
      "completion_date": "2021-03-31",
      "has_results": true,
      "last_update_posted_date": "2024-09-25",
      "last_synced_at": "2026-09-11T16:56:42.255Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04318444"
    },
    {
      "nct_id": "NCT03428945",
      "title": "Hydroxychloroquine in Individuals At-risk for Type 1 Diabetes Mellitus",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Type1 Diabetes Mellitus"
      ],
      "interventions": [
        {
          "name": "Hydroxychloroquine",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "3 Years and older"
      },
      "enrollment_count": 273,
      "start_date": "2018-08-15",
      "completion_date": "2022-10-31",
      "has_results": true,
      "last_update_posted_date": "2024-04-09",
      "last_synced_at": "2026-09-11T16:56:42.255Z",
      "location_count": 37,
      "location_summary": "Los Angeles, California • San Francisco, California • Stanford, California + 33 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03428945"
    },
    {
      "nct_id": "NCT04527549",
      "title": "Testing Dabrafenib and Trametinib With or Without Hydroxychloroquine in Stage IIIC or IV BRAF V600E/K Melanoma",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Clinical Stage IV Cutaneous Melanoma AJCC v8",
        "Locally Advanced Melanoma",
        "Pathologic Stage IIIC Cutaneous Melanoma AJCC v8",
        "Pathologic Stage IV Cutaneous Melanoma AJCC v8",
        "Unresectable Melanoma"
      ],
      "interventions": [
        {
          "name": "Dabrafenib mesylate",
          "type": "DRUG"
        },
        {
          "name": "Hydroxychloroquine",
          "type": "DRUG"
        },
        {
          "name": "Placebo Administration",
          "type": "DRUG"
        },
        {
          "name": "Trametinib dimethyl sulfoxide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "ECOG-ACRIN Cancer Research Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 5,
      "start_date": "2021-06-01",
      "completion_date": "2024-01-08",
      "has_results": true,
      "last_update_posted_date": "2026-08-06",
      "last_synced_at": "2026-09-11T16:56:42.255Z",
      "location_count": 199,
      "location_summary": "Anchorage, Alaska • Phoenix, Arizona • Scottsdale, Arizona + 139 more",
      "locations": [
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04527549"
    },
    {
      "nct_id": "NCT00579878",
      "title": "Triple III Comparison of Leflunomide Alone Versus Two DMARD Combinations in the Treatment of Rheumatoid Arthritis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Rheumatoid Arthritis"
      ],
      "interventions": [
        {
          "name": "Leflunomide",
          "type": "DRUG"
        },
        {
          "name": "Methotrexate-Sulfasalazine-Hydroxychloroquine",
          "type": "DRUG"
        },
        {
          "name": "Leflunomide-Sulfasalazine-Hydroxychloroquine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Nebraska",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "19 Years to 80 Years"
      },
      "enrollment_count": 69,
      "start_date": "2001-03-27",
      "completion_date": "2010-03-11",
      "has_results": true,
      "last_update_posted_date": "2023-10-02",
      "last_synced_at": "2026-09-11T16:56:42.255Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00579878"
    },
    {
      "nct_id": "NCT02124681",
      "title": "Rediscovering Hydroxychloroquine as a Novel Insulin Sensitizer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Insulin Resistance"
      ],
      "interventions": [
        {
          "name": "Hydroxychloroquine",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of Pittsburgh",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "69 Years",
        "sex": "ALL",
        "summary": "21 Years to 69 Years"
      },
      "enrollment_count": 34,
      "start_date": "2014-04",
      "completion_date": "2016-08",
      "has_results": false,
      "last_update_posted_date": "2017-06-06",
      "last_synced_at": "2026-09-11T16:56:42.255Z",
      "location_count": 1,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02124681"
    },
    {
      "nct_id": "NCT04369742",
      "title": "Treating COVID-19 With Hydroxychloroquine (TEACH)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "COVID-19"
      ],
      "interventions": [
        {
          "name": "Hydroxychloroquine (HCQ)",
          "type": "DRUG"
        },
        {
          "name": "Placebo: Calcium citrate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "NYU Langone Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 128,
      "start_date": "2020-04-15",
      "completion_date": "2021-04-01",
      "has_results": true,
      "last_update_posted_date": "2022-04-22",
      "last_synced_at": "2026-09-11T16:56:42.255Z",
      "location_count": 2,
      "location_summary": "Brooklyn, New York • New York, New York",
      "locations": [
        {
          "city": "Brooklyn",
          "state": "New York"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04369742"
    },
    {
      "nct_id": "NCT03283566",
      "title": "Hydroxychloroquine and Metabolic Outcomes in Patients Undergoing TPAIT",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Chronic Pancreatitis",
        "Insulin Dependent Diabetes"
      ],
      "interventions": [
        {
          "name": "Hydroxychloroquine",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "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": 9,
      "start_date": "2017-10-03",
      "completion_date": "2020-05-31",
      "has_results": true,
      "last_update_posted_date": "2022-04-08",
      "last_synced_at": "2026-09-11T16:56:42.255Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03283566"
    },
    {
      "nct_id": "NCT04363450",
      "title": "Hydroxychloroquine as Prophylaxis for COVID-19 in Healthcare Workers (HCQPreP)",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "COVID-19",
        "Corona Virus Infection",
        "Wuhan Coronavirus",
        "Prophylaxis",
        "Healthcare Worker",
        "Sars-CoV2",
        "Hydroxychloroquine"
      ],
      "interventions": [
        {
          "name": "Hydroxychloroquine",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Louisiana State University Health Sciences Center in New Orleans",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1700,
      "start_date": "2020-04-27",
      "completion_date": "2021-06-01",
      "has_results": false,
      "last_update_posted_date": "2020-09-02",
      "last_synced_at": "2026-09-11T16:56:42.255Z",
      "location_count": 2,
      "location_summary": "Lafayette, Louisiana",
      "locations": [
        {
          "city": "Lafayette",
          "state": "Louisiana"
        },
        {
          "city": "Lafayette",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04363450"
    },
    {
      "nct_id": "NCT04421664",
      "title": "Preemptive Therapy for SARS-Coronavirus-2 (COVID-19 PEP Canada)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Corona Virus Infection",
        "SARS-CoV Infection",
        "Coronavirus"
      ],
      "interventions": [
        {
          "name": "Hydroxychloroquine",
          "type": "DRUG"
        },
        {
          "name": "Placebo oral tablet",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "McGill University Health Centre/Research Institute of the McGill University Health Centre",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 70,
      "start_date": "2020-03-25",
      "completion_date": "2020-08-17",
      "has_results": false,
      "last_update_posted_date": "2024-10-15",
      "last_synced_at": "2026-09-11T16:56:42.255Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04421664"
    },
    {
      "nct_id": "NCT04328961",
      "title": "Hydroxychloroquine for COVID-19 Post-exposure Prophylaxis (PEP)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "COVID-19",
        "Corona Virus Infection",
        "SARS (Severe Acute Respiratory Syndrome)",
        "SARS-CoV-2"
      ],
      "interventions": [
        {
          "name": "Hydroxychloroquine Sulfate",
          "type": "DRUG"
        },
        {
          "name": "Ascorbic Acid",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 943,
      "start_date": "2020-03-31",
      "completion_date": "2020-10-08",
      "has_results": true,
      "last_update_posted_date": "2021-12-16",
      "last_synced_at": "2026-09-11T16:56:42.255Z",
      "location_count": 8,
      "location_summary": "Los Angeles, California • New Orleans, Louisiana • Baltimore, Maryland + 4 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "New Orleans",
          "state": "Louisiana"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04328961"
    }
  ]
}