{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Placebo+4-weeks",
    "query": {
      "intervention": "Placebo 4-weeks"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 4184,
    "total_pages": 419,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Placebo+4-weeks&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-03T09:55:59.815Z",
  "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": "NCT00273650",
      "title": "Efficacy Study of Subcutaneous Methyl-B12 in Children With Autism",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Autistic Disorder"
      ],
      "interventions": [
        {
          "name": "methylcobalamin",
          "type": "DRUG"
        },
        {
          "name": "saline placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "8 Years",
        "sex": "ALL",
        "summary": "3 Years to 8 Years"
      },
      "enrollment_count": 30,
      "start_date": "2005-07",
      "completion_date": "2009-08",
      "has_results": false,
      "last_update_posted_date": "2019-10-09",
      "last_synced_at": "2026-09-03T09:55:59.815Z",
      "location_count": 1,
      "location_summary": "Sacramento, California",
      "locations": [
        {
          "city": "Sacramento",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00273650"
    },
    {
      "nct_id": "NCT02193997",
      "title": "Constipation Fiber Trial",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Functional Constipation in Children"
      ],
      "interventions": [
        {
          "name": "Fiber",
          "type": "OTHER"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Warren Bishop",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "16 Years",
        "sex": "ALL",
        "summary": "2 Years to 16 Years"
      },
      "enrollment_count": 60,
      "start_date": "2012-06",
      "completion_date": "2014-07",
      "has_results": false,
      "last_update_posted_date": "2017-09-28",
      "last_synced_at": "2026-09-03T09:55:59.815Z",
      "location_count": 1,
      "location_summary": "Iowa City, Iowa",
      "locations": [
        {
          "city": "Iowa City",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02193997"
    },
    {
      "nct_id": "NCT03902080",
      "title": "Study to Evaluate the Efficacy, Safety and Tolerability of Vibegron in Men With Overactive Bladder (OAB) Symptoms on Pharmacological Therapy for Benign Prostatic Hyperplasia (BPH)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Overactive Bladder"
      ],
      "interventions": [
        {
          "name": "Vibegron",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Urovant Sciences GmbH",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "45 Years and older · Male only"
      },
      "enrollment_count": 1105,
      "start_date": "2019-03-26",
      "completion_date": "2023-06-15",
      "has_results": true,
      "last_update_posted_date": "2024-08-07",
      "last_synced_at": "2026-09-03T09:55:59.815Z",
      "location_count": 75,
      "location_summary": "Homewood, Alabama • Huntsville, Alabama • Mobile, Alabama + 64 more",
      "locations": [
        {
          "city": "Homewood",
          "state": "Alabama"
        },
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Glendale",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03902080"
    },
    {
      "nct_id": "NCT00117325",
      "title": "Study Of Adults And Adolescents With Vasomotor Rhinitis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Rhinitis, Vasomotor"
      ],
      "interventions": [
        {
          "name": "GW685698X",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "12 Years and older"
      },
      "enrollment_count": 352,
      "start_date": "2005-07-11",
      "completion_date": "2006-02-09",
      "has_results": true,
      "last_update_posted_date": "2018-03-13",
      "last_synced_at": "2026-09-03T09:55:59.815Z",
      "location_count": 38,
      "location_summary": "Beverly Hills, California • Huntington Beach, California • Mission Viejo, California + 34 more",
      "locations": [
        {
          "city": "Beverly Hills",
          "state": "California"
        },
        {
          "city": "Huntington Beach",
          "state": "California"
        },
        {
          "city": "Mission Viejo",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00117325"
    },
    {
      "nct_id": "NCT06750289",
      "title": "Randomised Clinical Trial to Investigate Efficacy and Safety of Benralizumab 30 mg SC as an add-on Therapy in Uncontrolled Eosinophilic Asthma Patients Treated With Medium-dose ICS-LABA Compared to Conventional Escalation to High-dose ICS-LABA Treatment",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Eosinophilic Asthma"
      ],
      "interventions": [
        {
          "name": "ICS-LABA",
          "type": "COMBINATION_PRODUCT"
        },
        {
          "name": "benralizumab",
          "type": "COMBINATION_PRODUCT"
        },
        {
          "name": "Placebo for Benralizumab",
          "type": "COMBINATION_PRODUCT"
        }
      ],
      "intervention_types": [
        "COMBINATION_PRODUCT"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "12 Years to 75 Years"
      },
      "enrollment_count": 400,
      "start_date": "2025-03-28",
      "completion_date": "2028-11-03",
      "has_results": false,
      "last_update_posted_date": "2026-05-13",
      "last_synced_at": "2026-09-03T09:55:59.815Z",
      "location_count": 34,
      "location_summary": "Chandler, Arizona • Sun City, Arizona • Tucson, Arizona + 28 more",
      "locations": [
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Sun City",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Bakersfield",
          "state": "California"
        },
        {
          "city": "Inglewood",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06750289"
    },
    {
      "nct_id": "NCT03020797",
      "title": "A Clinical Trial to Evaluate the Safety and Efficacy of Fycompa in Subjects With Amyotrophic Lateral Sclerosis (ALS)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Amyotrophic Lateral Sclerosis"
      ],
      "interventions": [
        {
          "name": "Perampanel",
          "type": "DRUG"
        },
        {
          "name": "Placebo Oral Tablet",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Stony Brook University",
      "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": 12,
      "start_date": "2017-01-12",
      "completion_date": "2023-02-08",
      "has_results": false,
      "last_update_posted_date": "2023-05-06",
      "last_synced_at": "2026-09-03T09:55:59.815Z",
      "location_count": 1,
      "location_summary": "Stony Brook, New York",
      "locations": [
        {
          "city": "Stony Brook",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03020797"
    },
    {
      "nct_id": "NCT06982820",
      "title": "Self Neuro-modulation Therapy for Major Depressive Disorder (MDD) With Anhedonia",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Depressive Disorder, Major"
      ],
      "interventions": [
        {
          "name": "Prism Training",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "GrayMatters Health Ltd.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "22 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "22 Years to 75 Years"
      },
      "enrollment_count": 170,
      "start_date": "2025-06-25",
      "completion_date": "2027-08-30",
      "has_results": false,
      "last_update_posted_date": "2026-05-01",
      "last_synced_at": "2026-09-03T09:55:59.815Z",
      "location_count": 2,
      "location_summary": "Providence, Rhode Island • Houston, Texas",
      "locations": [
        {
          "city": "Providence",
          "state": "Rhode Island"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06982820"
    },
    {
      "nct_id": "NCT02105948",
      "title": "Study to Evaluate Efficacy and Safety of Mepolizumab for Frequently Exacerbating Chronic Obstructive Pulmonary Disease (COPD) Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Pulmonary Disease, Chronic Obstructive"
      ],
      "interventions": [
        {
          "name": "Mepolizumab",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 837,
      "start_date": "2014-04-15",
      "completion_date": "2017-01-17",
      "has_results": true,
      "last_update_posted_date": "2018-08-31",
      "last_synced_at": "2026-09-03T09:55:59.815Z",
      "location_count": 20,
      "location_summary": "Newport Beach, California • Rochester, Minnesota • Saint Charles, Missouri + 17 more",
      "locations": [
        {
          "city": "Newport Beach",
          "state": "California"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "Saint Charles",
          "state": "Missouri"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Charlotte",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02105948"
    },
    {
      "nct_id": "NCT02219685",
      "title": "Ledipasvir/Sofosbuvir Fixed-Dose Combination on Cerebral Metabolism and Neurocognition in Treatment-Naive and Treatment-Experienced Participants With Chronic Genotype 1 HCV Infection",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hepatitis C Virus Infection"
      ],
      "interventions": [
        {
          "name": "LDV/SOF",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Gilead Sciences",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 40,
      "start_date": "2014-08",
      "completion_date": "2016-04",
      "has_results": true,
      "last_update_posted_date": "2018-11-16",
      "last_synced_at": "2026-09-03T09:55:59.815Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02219685"
    },
    {
      "nct_id": "NCT03574597",
      "title": "Semaglutide Effects on Heart Disease and Stroke in Patients With Overweight or Obesity",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Overweight",
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Semaglutide",
          "type": "DRUG"
        },
        {
          "name": "Placebo (semaglutide)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Novo Nordisk A/S",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "45 Years and older"
      },
      "enrollment_count": 17604,
      "start_date": "2018-10-24",
      "completion_date": "2023-06-29",
      "has_results": true,
      "last_update_posted_date": "2024-08-30",
      "last_synced_at": "2026-09-03T09:55:59.815Z",
      "location_count": 205,
      "location_summary": "Birmingham, Alabama • Montgomery, Alabama • Glendale, Arizona + 163 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Montgomery",
          "state": "Alabama"
        },
        {
          "city": "Glendale",
          "state": "Arizona"
        },
        {
          "city": "Glendale",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03574597"
    }
  ]
}