{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=acetaminophen+650mg",
    "query": {
      "intervention": "acetaminophen 650mg"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 40,
    "total_pages": 4,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=acetaminophen+650mg&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-03T01:23:36.241Z",
  "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": "NCT03385057",
      "title": "Postoperative Ibuprofen Use and Risk of Bleeding in Pediatric Tonsillectomy",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Tonsillectomy With or Without Adenoidectomy"
      ],
      "interventions": [
        {
          "name": "Ibuprofen",
          "type": "DRUG"
        },
        {
          "name": "Acetaminophen",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Massachusetts Eye and Ear Infirmary",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "2 Years to 18 Years"
      },
      "enrollment_count": 0,
      "start_date": "2018-09",
      "completion_date": "2023-01-01",
      "has_results": false,
      "last_update_posted_date": "2018-09-20",
      "last_synced_at": "2026-09-03T01:23:36.241Z",
      "location_count": 5,
      "location_summary": "San Diego, California • Atlanta, Georgia • Cleveland, Ohio + 2 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        },
        {
          "city": "Portsmouth",
          "state": "Virginia"
        },
        {
          "city": "Tacoma",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03385057"
    },
    {
      "nct_id": "NCT04175509",
      "title": "Improving Post-Operative Pain and Recovery in Gynecologic Surgery",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Postoperative Pain",
        "Opioid Use",
        "Acetaminophen"
      ],
      "interventions": [
        {
          "name": "Rectal acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "Intravenous acetaminophen",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Aultman Health Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 40,
      "start_date": "2019-12-23",
      "completion_date": "2021-06-01",
      "has_results": true,
      "last_update_posted_date": "2022-01-20",
      "last_synced_at": "2026-09-03T01:23:36.241Z",
      "location_count": 1,
      "location_summary": "Canton, Ohio",
      "locations": [
        {
          "city": "Canton",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04175509"
    },
    {
      "nct_id": "NCT04976387",
      "title": "Post Operative Analgesia and Patient Satisfaction",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Postoperative Pain",
        "Patient Satisfaction",
        "Analgesia"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Loma Linda University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "89 Years",
        "sex": "ALL",
        "summary": "18 Years to 89 Years"
      },
      "enrollment_count": 160,
      "start_date": "2021-07-02",
      "completion_date": "2023-05-11",
      "has_results": false,
      "last_update_posted_date": "2026-03-30",
      "last_synced_at": "2026-09-03T01:23:36.241Z",
      "location_count": 1,
      "location_summary": "Loma Linda, California",
      "locations": [
        {
          "city": "Loma Linda",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04976387"
    },
    {
      "nct_id": "NCT04122443",
      "title": "Acetaminophen (APAP) +/- Oxycodone",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Musculoskeletal Pain"
      ],
      "interventions": [
        {
          "name": "Acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "Oxycodone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Montefiore Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 393,
      "start_date": "2019-12-01",
      "completion_date": "2022-07-31",
      "has_results": true,
      "last_update_posted_date": "2024-02-28",
      "last_synced_at": "2026-09-03T01:23:36.241Z",
      "location_count": 1,
      "location_summary": "The Bronx, New York",
      "locations": [
        {
          "city": "The Bronx",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04122443"
    },
    {
      "nct_id": "NCT03088826",
      "title": "Analgesic Efficacy of (MSIR)/Acetaminophen vs. Oxycodone/Acetaminophen (Percocet)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Pain Management"
      ],
      "interventions": [
        {
          "name": "Morphine Sulfate",
          "type": "DRUG"
        },
        {
          "name": "Oxycodone",
          "type": "DRUG"
        },
        {
          "name": "Acetaminophen",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Antonios Likourezos",
      "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": 80,
      "start_date": "2017-08-18",
      "completion_date": "2020-12-22",
      "has_results": true,
      "last_update_posted_date": "2022-03-14",
      "last_synced_at": "2026-09-03T01:23:36.241Z",
      "location_count": 1,
      "location_summary": "Brooklyn, New York",
      "locations": [
        {
          "city": "Brooklyn",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03088826"
    },
    {
      "nct_id": "NCT02605187",
      "title": "Patient-Driven Analgesic Protocol Selection for Post-Cesarean Pain Management",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Postoperative Pain"
      ],
      "interventions": [
        {
          "name": "No choice given",
          "type": "OTHER"
        },
        {
          "name": "Choice given",
          "type": "OTHER"
        },
        {
          "name": "Ibuprofen",
          "type": "DRUG"
        },
        {
          "name": "Acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "Gabapentin",
          "type": "DRUG"
        },
        {
          "name": "Morphine (low)",
          "type": "DRUG"
        },
        {
          "name": "Morphine (med)",
          "type": "DRUG"
        },
        {
          "name": "Morphine (high)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DRUG"
      ],
      "sponsor": "Stanford University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 50 Years · Female only"
      },
      "enrollment_count": 160,
      "start_date": "2015-11",
      "completion_date": "2017-05-22",
      "has_results": true,
      "last_update_posted_date": "2018-10-16",
      "last_synced_at": "2026-09-03T01:23:36.241Z",
      "location_count": 1,
      "location_summary": "Palo Alto, California",
      "locations": [
        {
          "city": "Palo Alto",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02605187"
    },
    {
      "nct_id": "NCT05287217",
      "title": "Post-operative Pain Control With Acetaminophen and Ibuprofen After Functional Endoscopic Sinus Surgery",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Chronic Rhinosinusitis (Diagnosis)"
      ],
      "interventions": [
        {
          "name": "Comparison of medication administration for pain control",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Illinois at Chicago",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2022-07-29",
      "completion_date": "2023-06-30",
      "has_results": false,
      "last_update_posted_date": "2025-05-20",
      "last_synced_at": "2026-09-03T01:23:36.241Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05287217"
    },
    {
      "nct_id": "NCT02858310",
      "title": "E7 TCR T Cells for Human Papillomavirus-Associated Cancers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Papillomavirus Infections",
        "Cervical Intraepithelial Neoplasia",
        "Carcinoma In Situ",
        "Vulvar Neoplasms",
        "Vulvar Diseases"
      ],
      "interventions": [
        {
          "name": "E7 TCR cells",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Aldesleukin",
          "type": "DRUG"
        },
        {
          "name": "Fludarabine",
          "type": "DRUG"
        },
        {
          "name": "Cyclophosphamide",
          "type": "DRUG"
        },
        {
          "name": "EKG",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Biopsy",
          "type": "PROCEDURE"
        },
        {
          "name": "Chest CT and MRI or PET",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "PFT",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Granisetron",
          "type": "DRUG"
        },
        {
          "name": "Ondansetron",
          "type": "DRUG"
        },
        {
          "name": "Droperidol",
          "type": "DRUG"
        },
        {
          "name": "Prochlorperazine",
          "type": "DRUG"
        },
        {
          "name": "Diphenoxylate HCL",
          "type": "DRUG"
        },
        {
          "name": "Atropine sulfate",
          "type": "DRUG"
        },
        {
          "name": "Codeine sulfate",
          "type": "DRUG"
        },
        {
          "name": "Loperamide",
          "type": "DRUG"
        },
        {
          "name": "Indomethacin",
          "type": "DRUG"
        },
        {
          "name": "Acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "Diphenhydramine HCL",
          "type": "DRUG"
        },
        {
          "name": "Hydroxyzine HCL",
          "type": "DRUG"
        },
        {
          "name": "Meperidine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DRUG",
        "DIAGNOSTIC_TEST",
        "PROCEDURE"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "120 Years",
        "sex": "ALL",
        "summary": "18 Years to 120 Years"
      },
      "enrollment_count": 224,
      "start_date": "2017-01-27",
      "completion_date": "2025-07-02",
      "has_results": true,
      "last_update_posted_date": "2026-03-09",
      "last_synced_at": "2026-09-03T01:23:36.241Z",
      "location_count": 2,
      "location_summary": "Bethesda, Maryland • New Brunswick, New Jersey",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        },
        {
          "city": "New Brunswick",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02858310"
    },
    {
      "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": "2026-09-03T01:23:36.241Z",
      "location_count": 1,
      "location_summary": "Evanston, Illinois",
      "locations": [
        {
          "city": "Evanston",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06861920"
    },
    {
      "nct_id": "NCT03824938",
      "title": "Aspirin for Exercise in Multiple Sclerosis (ASPIRE)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Multiple Sclerosis"
      ],
      "interventions": [
        {
          "name": "Aspirin 650mg Oral Capsule",
          "type": "DRUG"
        },
        {
          "name": "Acetaminophen Tablet 650mg",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Columbia University",
      "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": 60,
      "start_date": "2019-04-30",
      "completion_date": "2022-02-28",
      "has_results": true,
      "last_update_posted_date": "2023-10-27",
      "last_synced_at": "2026-09-03T01:23:36.241Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03824938"
    }
  ]
}