{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Acetaminophen+%28Tylenol+extra+strength%29&page=4",
    "query": {
      "intervention": "Acetaminophen (Tylenol extra strength)",
      "page": 4
    },
    "page_size": 10
  },
  "pagination": {
    "page": 4,
    "page_size": 10,
    "total_count": 239,
    "total_pages": 24,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Acetaminophen+%28Tylenol+extra+strength%29&page=5&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Acetaminophen+%28Tylenol+extra+strength%29&page=3&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-09T14:39:57.343Z",
  "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": "NCT03893175",
      "title": "Towards Predicting the Analgesic Response to Ibuprofen Following Third-molar Extraction",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Impacted Third Molar Tooth",
        "Pain, Acute"
      ],
      "interventions": [
        {
          "name": "Ibuprofen",
          "type": "DRUG"
        },
        {
          "name": "Acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Oxycodone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "64 Years",
        "sex": "ALL",
        "summary": "18 Years to 64 Years"
      },
      "enrollment_count": 86,
      "start_date": "2019-05-10",
      "completion_date": "2022-03-02",
      "has_results": false,
      "last_update_posted_date": "2025-07-24",
      "last_synced_at": "2026-10-09T14:39:57.343Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03893175"
    },
    {
      "nct_id": "NCT03651804",
      "title": "Radiofrequency Ablation: Treatment for Posterior Element Pain From Vertebral Compression Fractures",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Vertebral Compression Fracture",
        "Facet Joint Pain"
      ],
      "interventions": [
        {
          "name": "Radiofrequency ablation of the medial branch nerves",
          "type": "PROCEDURE"
        },
        {
          "name": "Non-steroidal anti-inflammatory drugs",
          "type": "DRUG"
        },
        {
          "name": "Bisphosphonates",
          "type": "DRUG"
        },
        {
          "name": "Acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "Physical therapy",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Opioids",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DRUG",
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, Davis",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "18 Years to 90 Years"
      },
      "enrollment_count": 0,
      "start_date": "2019-04-10",
      "completion_date": "2023-12-19",
      "has_results": false,
      "last_update_posted_date": "2025-07-16",
      "last_synced_at": "2026-10-09T14:39:57.343Z",
      "location_count": 1,
      "location_summary": "Davis, California",
      "locations": [
        {
          "city": "Davis",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03651804"
    },
    {
      "nct_id": "NCT02385266",
      "title": "Treating Urological Chronic Pelvic Pain Syndrome (UCPPS) Pain",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Chronic Prostatitis With Chronic Pelvic Pain Syndrome"
      ],
      "interventions": [
        {
          "name": "D-Cycloserine",
          "type": "DRUG"
        },
        {
          "name": "Placebo (for D-cycloserine)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Northwestern University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 24,
      "start_date": "2013-09",
      "completion_date": "2016-06",
      "has_results": true,
      "last_update_posted_date": "2023-05-17",
      "last_synced_at": "2026-10-09T14:39:57.343Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02385266"
    },
    {
      "nct_id": "NCT00186628",
      "title": "Phase 2 Trial of Prophylactic Rituximab Therapy for Prevention of CGVHD",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Leukemia, Mast-Cell",
        "Mantle-cell Lymphoma"
      ],
      "interventions": [
        {
          "name": "Total lymphoid irradiation",
          "type": "PROCEDURE"
        },
        {
          "name": "Rituximab",
          "type": "DRUG"
        },
        {
          "name": "Anti-thymoglobulin, rabbit (ATG, rabbit ATG)",
          "type": "DRUG"
        },
        {
          "name": "Cyclosporine",
          "type": "DRUG"
        },
        {
          "name": "Mycophenylate mofetil",
          "type": "DRUG"
        },
        {
          "name": "Filgrastim",
          "type": "DRUG"
        },
        {
          "name": "Granisetron",
          "type": "DRUG"
        },
        {
          "name": "Solumedrol",
          "type": "DRUG"
        },
        {
          "name": "Acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "Diphenhydramine",
          "type": "DRUG"
        },
        {
          "name": "Hydrocortisone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DRUG"
      ],
      "sponsor": "Stanford University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "76 Years",
        "sex": "ALL",
        "summary": "18 Years to 76 Years"
      },
      "enrollment_count": 36,
      "start_date": "2005-06",
      "completion_date": "2010-12",
      "has_results": true,
      "last_update_posted_date": "2017-11-28",
      "last_synced_at": "2026-10-09T14:39:57.343Z",
      "location_count": 1,
      "location_summary": "Stanford, California",
      "locations": [
        {
          "city": "Stanford",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00186628"
    },
    {
      "nct_id": "NCT03770806",
      "title": "Factors Affecting the Speed of Recovery After ACL Reconstruction",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Anterior Cruciate Ligament Injury",
        "ACL Injury",
        "ACL - Anterior Cruciate Ligament Rupture"
      ],
      "interventions": [
        {
          "name": "Femoral Nerve Block",
          "type": "PROCEDURE"
        },
        {
          "name": "Adductor Nerve Block",
          "type": "PROCEDURE"
        },
        {
          "name": "No Block",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "OTHER"
      ],
      "sponsor": "University of Washington",
      "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": 48,
      "start_date": "2017-03-24",
      "completion_date": "2018-06-11",
      "has_results": false,
      "last_update_posted_date": "2018-12-10",
      "last_synced_at": "2026-10-09T14:39:57.343Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03770806"
    },
    {
      "nct_id": "NCT05003596",
      "title": "Efficacy of Steroids on Functional Outcomes After Musculoskeletal Injuries of the Hand",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Hand Injuries",
        "Finger Injuries"
      ],
      "interventions": [
        {
          "name": "Methylprednisolone Tablet",
          "type": "DRUG"
        },
        {
          "name": "Standard Mobilization Treatment",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Robert Wood Johnson Barnabas Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2021-09-01",
      "completion_date": "2023-09-01",
      "has_results": false,
      "last_update_posted_date": "2021-08-12",
      "last_synced_at": "2026-10-09T14:39:57.343Z",
      "location_count": 2,
      "location_summary": "Brick, New Jersey • Somerset, New Jersey",
      "locations": [
        {
          "city": "Brick",
          "state": "New Jersey"
        },
        {
          "city": "Somerset",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05003596"
    },
    {
      "nct_id": "NCT00166608",
      "title": "Cytokines Polymorphisms and Acetaminophen Toxicity",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Drug Toxicity"
      ],
      "interventions": [
        {
          "name": "Blood sampling",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Arkansas Children's Hospital Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 111,
      "start_date": "2002-12",
      "completion_date": "2007-09",
      "has_results": false,
      "last_update_posted_date": "2012-04-12",
      "last_synced_at": "2026-10-09T14:39:57.343Z",
      "location_count": 7,
      "location_summary": "Little Rock, Arkansas • Louisville, Kentucky • Detroit, Michigan + 4 more",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Louisville",
          "state": "Kentucky"
        },
        {
          "city": "Detroit",
          "state": "Michigan"
        },
        {
          "city": "Kansas City",
          "state": "Missouri"
        },
        {
          "city": "Chapel Hill",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00166608"
    },
    {
      "nct_id": "NCT01588158",
      "title": "Patient Satisfaction With Pain Relief After Ambulatory Hand Surgery",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Carpal Tunnel Syndrome"
      ],
      "interventions": [
        {
          "name": "Acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "Vicodin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "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": 7,
      "start_date": "2012-07",
      "completion_date": "2016-01",
      "has_results": true,
      "last_update_posted_date": "2017-03-14",
      "last_synced_at": "2026-10-09T14:39:57.343Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01588158"
    },
    {
      "nct_id": "NCT02455518",
      "title": "Comparative Efficacy of 4 Oral Analgesics",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Pain"
      ],
      "interventions": [
        {
          "name": "Oxycodone/acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "Hydrocodone/acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "Codeine/acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "Ibuprofen/acetaminophen",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Montefiore Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "21 Years to 65 Years"
      },
      "enrollment_count": 416,
      "start_date": "2015-07",
      "completion_date": "2017-10-04",
      "has_results": true,
      "last_update_posted_date": "2018-02-13",
      "last_synced_at": "2026-10-09T14:39:57.343Z",
      "location_count": 1,
      "location_summary": "The Bronx, New York",
      "locations": [
        {
          "city": "The Bronx",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02455518"
    },
    {
      "nct_id": "NCT06861920",
      "title": "NSAID Use for Treating Dysmenorrhea and Preventing Chronic Pelvic Pain (NSAID HEAL)",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Dysmenorrhea",
        "Chronic Pelvic Pain",
        "Pelvic Pain"
      ],
      "interventions": [
        {
          "name": "Naproxen Sodium 550mg",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Extended Release Acetaminophen (650 mg)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Endeavor Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 35 Years · Female only"
      },
      "enrollment_count": 600,
      "start_date": "2025-04-07",
      "completion_date": "2030-07",
      "has_results": false,
      "last_update_posted_date": "2025-08-07",
      "last_synced_at": "2026-10-09T14:39:57.343Z",
      "location_count": 1,
      "location_summary": "Evanston, Illinois",
      "locations": [
        {
          "city": "Evanston",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06861920"
    }
  ]
}