{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=placebo+group&page=21",
    "query": {
      "intervention": "placebo group",
      "page": 21
    },
    "page_size": 10
  },
  "pagination": {
    "page": 21,
    "page_size": 10,
    "total_count": 7251,
    "total_pages": 726,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=placebo+group&page=22&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=placebo+group&page=20&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-15T02:41:32.468Z",
  "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": "NCT02836899",
      "title": "Effect of Nitric Oxide in Cardiac Surgery Patients With Endothelial Dysfunction.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Acute Kidney Injury"
      ],
      "interventions": [
        {
          "name": "Nitric Oxide",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 250,
      "start_date": "2017-02-08",
      "completion_date": "2025-08-15",
      "has_results": true,
      "last_update_posted_date": "2026-03-10",
      "last_synced_at": "2026-10-15T02:41:32.468Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02836899"
    },
    {
      "nct_id": "NCT02365909",
      "title": "Study Evaluating Sphenopalatine Ganglion Block (SPGB) for Treatment of Postdural Puncture Headache (PDPH)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Postdural Puncture Headache"
      ],
      "interventions": [
        {
          "name": "0.5% bupivacaine",
          "type": "DRUG"
        },
        {
          "name": "normal saline",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Arkansas",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 6,
      "start_date": "2015-06-29",
      "completion_date": "2016-08-30",
      "has_results": false,
      "last_update_posted_date": "2017-09-18",
      "last_synced_at": "2026-10-15T02:41:32.468Z",
      "location_count": 1,
      "location_summary": "Little Rock, Arkansas",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02365909"
    },
    {
      "nct_id": "NCT01501799",
      "title": "A Bioequivalence Study With Clinical Endpoints Comparing Adapalene and Benzoyl Peroxide Topical Gel 0.1%/2.5% (Actavis Mid-Atlantic LLC) To Epiduo™ (Adapalene and Benzoyl Peroxide) Gel 0.1%/2.5% (Galderma Laboratories, L.P.) in the Treatment of Mild to Severe Acne Vulgaris",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Acne Vulgaris"
      ],
      "interventions": [
        {
          "name": "adapalene 0.1% and benzoyl peroxide 2.5% topical gel",
          "type": "DRUG"
        },
        {
          "name": "EPIDUO",
          "type": "DRUG"
        },
        {
          "name": "Placebo (Vehicle Gel)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Actavis Mid-Atlantic LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "12 Years to 40 Years"
      },
      "enrollment_count": 885,
      "start_date": "2011-07",
      "completion_date": "2011-12",
      "has_results": false,
      "last_update_posted_date": "2011-12-29",
      "last_synced_at": "2026-10-15T02:41:32.468Z",
      "location_count": 8,
      "location_summary": "Fremont, California • Miami, Florida • Miramar, Florida + 5 more",
      "locations": [
        {
          "city": "Fremont",
          "state": "California"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Miramar",
          "state": "Florida"
        },
        {
          "city": "Plainfield",
          "state": "Indiana"
        },
        {
          "city": "Overland Park",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01501799"
    },
    {
      "nct_id": "NCT02971839",
      "title": "Study to Evaluate the Safety and Efficacy of CTP-656 in Patients With Cystic Fibrosis With CFTR Gating Mutations",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Cystic Fibrosis"
      ],
      "interventions": [
        {
          "name": "VX-561",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "IVA",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Vertex Pharmaceuticals Incorporated",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 11,
      "start_date": "2016-12",
      "completion_date": "2017-08",
      "has_results": true,
      "last_update_posted_date": "2020-08-26",
      "last_synced_at": "2026-10-15T02:41:32.468Z",
      "location_count": 14,
      "location_summary": "Los Angeles, California • Palo Alto, California • Washington D.C., District of Columbia + 11 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02971839"
    },
    {
      "nct_id": "NCT00528411",
      "title": "A Study of the Onset and Offset of Antiplatelet Effects Comparing Ticagrelor, Clopidogrel, and Placebo With Aspirin",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Coronary Artery Disease"
      ],
      "interventions": [
        {
          "name": "Ticagrelor Tablets",
          "type": "DRUG"
        },
        {
          "name": "Clopidogrel (over encapsulated) capsule",
          "type": "DRUG"
        },
        {
          "name": "Aspirin Tablets",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 123,
      "start_date": "2007-10",
      "completion_date": "2009-03",
      "has_results": true,
      "last_update_posted_date": "2012-01-13",
      "last_synced_at": "2026-10-15T02:41:32.468Z",
      "location_count": 8,
      "location_summary": "Baton Rouge, Louisiana • Baltimore, Maryland • Towson, Maryland + 5 more",
      "locations": [
        {
          "city": "Baton Rouge",
          "state": "Louisiana"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Towson",
          "state": "Maryland"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        },
        {
          "city": "Oklahoma City",
          "state": "Oklahoma"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00528411"
    },
    {
      "nct_id": "NCT01048944",
      "title": "Nicotine Replacement Therapy (NRT) and Bupropion Mechanisms of Effectiveness in Smokers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Nicotine Dependence"
      ],
      "interventions": [
        {
          "name": "Bupropion SR",
          "type": "DRUG"
        },
        {
          "name": "Nicotine Patch",
          "type": "DRUG"
        },
        {
          "name": "Placebo Patch and Placebo Pill",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Southern Illinois University Carbondale",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "18 Years to 55 Years"
      },
      "enrollment_count": 197,
      "start_date": "2005-06",
      "completion_date": "2013-01",
      "has_results": true,
      "last_update_posted_date": "2014-11-25",
      "last_synced_at": "2026-10-15T02:41:32.468Z",
      "location_count": 1,
      "location_summary": "Carbondale, Illinois",
      "locations": [
        {
          "city": "Carbondale",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01048944"
    },
    {
      "nct_id": "NCT00490971",
      "title": "A Study to Evaluate the Effectiveness and Safety of Extended-Release (ER) Paliperidone Compared With Placebo in Delaying the Recurrence of Symptoms in Bipolar I Disorder",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Bipolar Disorder"
      ],
      "interventions": [
        {
          "name": "Olanzapine",
          "type": "DRUG"
        },
        {
          "name": "Paliperidone ER",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Johnson & Johnson Pharmaceutical Research & Development, L.L.C.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 768,
      "start_date": "2006-05",
      "completion_date": "2010-04",
      "has_results": true,
      "last_update_posted_date": "2015-04-15",
      "last_synced_at": "2026-10-15T02:41:32.468Z",
      "location_count": 16,
      "location_summary": "Scottsdale, Arizona • Riverside, California • San Diego, California + 13 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Riverside",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Honolulu",
          "state": "Hawaii"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00490971"
    },
    {
      "nct_id": "NCT03681093",
      "title": "Study of Efficacy of Fevipiprant in Patients With Nasal Polyposis and Asthma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Nasal Polyps"
      ],
      "interventions": [
        {
          "name": "Fevipiprant 150 mg",
          "type": "DRUG"
        },
        {
          "name": "Fevipiprant 450 mg",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Novartis Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 98,
      "start_date": "2019-03-26",
      "completion_date": "2020-06-10",
      "has_results": true,
      "last_update_posted_date": "2021-10-11",
      "last_synced_at": "2026-10-15T02:41:32.468Z",
      "location_count": 1,
      "location_summary": "Irvine, California",
      "locations": [
        {
          "city": "Irvine",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03681093"
    },
    {
      "nct_id": "NCT00532493",
      "title": "Cooperative Studies Program #563 - Prazosin and Combat Trauma PTSD",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "PTSD",
        "Sleep Disorders"
      ],
      "interventions": [
        {
          "name": "prazosin",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "VA Office of Research and Development",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 304,
      "start_date": "2010-01-06",
      "completion_date": "2013-05-31",
      "has_results": true,
      "last_update_posted_date": "2018-05-01",
      "last_synced_at": "2026-10-15T02:41:32.468Z",
      "location_count": 15,
      "location_summary": "Loma Linda, California • Long Beach, California • Palo Alto, California + 12 more",
      "locations": [
        {
          "city": "Loma Linda",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Decatur",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00532493"
    },
    {
      "nct_id": "NCT04883736",
      "title": "A Study Comparing Tretinoin Gel Microsphere, 0.1% and RETIN-A MICRO ® Gel Microsphere, 0.1% in the Treatment of Acne Vulgaris",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Acne Vulgaris"
      ],
      "interventions": [
        {
          "name": "Tretinoin Gel Microsphere, 0.1%",
          "type": "DRUG"
        },
        {
          "name": "RETIN-A MICRO® (Tretinoin) Gel Microsphere, 0.1%",
          "type": "DRUG"
        },
        {
          "name": "Placebo Control",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Sun Pharmaceutical Industries, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "12 Years to 40 Years"
      },
      "enrollment_count": 973,
      "start_date": "2020-08-31",
      "completion_date": "2021-04-16",
      "has_results": false,
      "last_update_posted_date": "2021-05-12",
      "last_synced_at": "2026-10-15T02:41:32.468Z",
      "location_count": 1,
      "location_summary": "Charlotte, North Carolina",
      "locations": [
        {
          "city": "Charlotte",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04883736"
    }
  ]
}