{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Naproxen-matching+placebo",
    "query": {
      "intervention": "Naproxen-matching placebo"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 37,
    "total_pages": 4,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Naproxen-matching+placebo&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-25T16:48:18.713Z",
  "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": "NCT00626275",
      "title": "Study Evaluating the Analgesic Efficacy and Safety of ADL5859 in Participants With Rheumatoid Arthritis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Rheumatoid Arthritis"
      ],
      "interventions": [
        {
          "name": "ADL5859",
          "type": "DRUG"
        },
        {
          "name": "Naproxen",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Cubist Pharmaceuticals LLC, a subsidiary of Merck & Co., Inc. (Rahway, New Jersey USA)",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 46,
      "start_date": "2007-10",
      "completion_date": "2008-09",
      "has_results": true,
      "last_update_posted_date": "2015-07-01",
      "last_synced_at": "2026-09-25T16:48:18.713Z",
      "location_count": 8,
      "location_summary": "Trumbull, Connecticut • Daytona Beach, Florida • Wheaton, Maryland + 5 more",
      "locations": [
        {
          "city": "Trumbull",
          "state": "Connecticut"
        },
        {
          "city": "Daytona Beach",
          "state": "Florida"
        },
        {
          "city": "Wheaton",
          "state": "Maryland"
        },
        {
          "city": "Omaha",
          "state": "Nebraska"
        },
        {
          "city": "Las Vegas",
          "state": "Nevada"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00626275"
    },
    {
      "nct_id": "NCT00329459",
      "title": "Treximet (Sumatriptan/Naproxen Sodium), Formerly Known as TREXIMA, for Menstrual Migraine in Women With Dysmenorrhea",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Migraine Disorders"
      ],
      "interventions": [
        {
          "name": "sumatriptan succinate/naproxen sodium",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 65 Years · Female only"
      },
      "enrollment_count": 320,
      "start_date": "2006-05",
      "completion_date": "2006-11",
      "has_results": false,
      "last_update_posted_date": "2016-10-24",
      "last_synced_at": "2026-09-25T16:48:18.713Z",
      "location_count": 34,
      "location_summary": "Mesa, Arizona • Little Rock, Arkansas • Fair Oaks, California + 31 more",
      "locations": [
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Fair Oaks",
          "state": "California"
        },
        {
          "city": "Newport Beach",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00329459"
    },
    {
      "nct_id": "NCT02847702",
      "title": "A Study to Evaluate the Analgesic Efficacy and Safety of VM902A in Subjects With Osteoarthritis (OA) of the Knee",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Osteoarthritis Pain of the Knee"
      ],
      "interventions": [
        {
          "name": "VM902A 200-mg Capsules",
          "type": "DRUG"
        },
        {
          "name": "VM902A 400-mg Capsules",
          "type": "DRUG"
        },
        {
          "name": "Naproxen 500-mg Capsules",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Purdue Pharma LP",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "40 Years to 75 Years"
      },
      "enrollment_count": 75,
      "start_date": "2016-08",
      "completion_date": "2016-11-22",
      "has_results": false,
      "last_update_posted_date": "2017-11-22",
      "last_synced_at": "2026-09-25T16:48:18.713Z",
      "location_count": 31,
      "location_summary": "Birmingham, Alabama • Huntsville, Alabama • DeLand, Florida + 28 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "DeLand",
          "state": "Florida"
        },
        {
          "city": "Hialeah",
          "state": "Florida"
        },
        {
          "city": "Homestead",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02847702"
    },
    {
      "nct_id": "NCT00240617",
      "title": "Study Of Treximet, Formerly Known as Trexima, In The Acute Treatment Of Multiple Migraine Attacks",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Migraine Disorders"
      ],
      "interventions": [
        {
          "name": "sumatriptan succinate/naproxen sodium",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "GlaxoSmithKline",
      "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": 623,
      "start_date": "2005-10",
      "completion_date": "2006-06",
      "has_results": false,
      "last_update_posted_date": "2016-10-26",
      "last_synced_at": "2026-09-25T16:48:18.713Z",
      "location_count": 52,
      "location_summary": "Anniston, Alabama • Tuscaloosa, Alabama • Mesa, Arizona + 48 more",
      "locations": [
        {
          "city": "Anniston",
          "state": "Alabama"
        },
        {
          "city": "Tuscaloosa",
          "state": "Alabama"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Hot Springs",
          "state": "Arkansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00240617"
    },
    {
      "nct_id": "NCT03654326",
      "title": "A Study to Evaluate the Efficacy and Safety of Gefapixant (MK-7264) in Women With Endometriosis-Related Pain (MK-7264-034)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Endometriosis-related Pain"
      ],
      "interventions": [
        {
          "name": "Gefapixant",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Naproxen",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Merck Sharp & Dohme LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "49 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 49 Years · Female only"
      },
      "enrollment_count": 187,
      "start_date": "2018-09-11",
      "completion_date": "2020-06-30",
      "has_results": true,
      "last_update_posted_date": "2024-11-04",
      "last_synced_at": "2026-09-25T16:48:18.713Z",
      "location_count": 30,
      "location_summary": "Birmingham, Alabama • Chandler, Arizona • Scottsdale, Arizona + 25 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Arcadia",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03654326"
    },
    {
      "nct_id": "NCT00981357",
      "title": "A Study To Investigate Whether PF-04457845 Is Effective In Treating Pain, Is Safe And Tolerable In Patients With Osteoarthritis Of The Knee",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Osteoarthritis, Knee"
      ],
      "interventions": [
        {
          "name": "PF-04457845",
          "type": "DRUG"
        },
        {
          "name": "Naproxen",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 76,
      "start_date": "2009-11",
      "completion_date": "2010-05",
      "has_results": false,
      "last_update_posted_date": "2017-09-19",
      "last_synced_at": "2026-09-25T16:48:18.713Z",
      "location_count": 5,
      "location_summary": "Miami, Florida • Overland Park, Kansas • San Antonio, Texas",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Overland Park",
          "state": "Kansas"
        },
        {
          "city": "Overland Park",
          "state": "Kansas"
        },
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00981357"
    },
    {
      "nct_id": "NCT01688934",
      "title": "Analgesic Efficacy and Safety of V116517 in Subjects With Moderate to Severe Chronic Pain Due to Osteoarthritis (OA) of the Knee",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Osteoarthritis, Knee",
        "Pain"
      ],
      "interventions": [
        {
          "name": "V116517 50-mg tablets",
          "type": "DRUG"
        },
        {
          "name": "V116517 30-mg tablets",
          "type": "DRUG"
        },
        {
          "name": "Naproxen 500-mg capsules",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Purdue Pharma LP",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "40 Years to 80 Years"
      },
      "enrollment_count": 230,
      "start_date": "2012-09",
      "completion_date": "2013-08",
      "has_results": false,
      "last_update_posted_date": "2013-12-05",
      "last_synced_at": "2026-09-25T16:48:18.713Z",
      "location_count": 18,
      "location_summary": "Tucson, Arizona • Boynton Beach, Florida • DeLand, Florida + 13 more",
      "locations": [
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Boynton Beach",
          "state": "Florida"
        },
        {
          "city": "DeLand",
          "state": "Florida"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01688934"
    },
    {
      "nct_id": "NCT04132336",
      "title": "Study to Find Out the Optimal Dose of Caffeine in the Combination Tablet of Naproxen Sodium and Caffeine in Patients Experiencing Moderate to Severe Pain After Having Wisdom Teeth Removed",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Pain, Postoperative"
      ],
      "interventions": [
        {
          "name": "Naproxen sodium/Caffeine (BAY2880376)",
          "type": "DRUG"
        },
        {
          "name": "Naproxen sodium (Aleve)",
          "type": "DRUG"
        },
        {
          "name": "Caffeine",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bayer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "16 Years and older"
      },
      "enrollment_count": 193,
      "start_date": "2019-11-12",
      "completion_date": "2020-03-03",
      "has_results": true,
      "last_update_posted_date": "2021-09-01",
      "last_synced_at": "2026-09-25T16:48:18.713Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04132336"
    },
    {
      "nct_id": "NCT03949673",
      "title": "Study to Evaluate Arthroplasty Specimens for Osteoarthritis of the Knee and Hip",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Osteoarthritis, Knee",
        "Osteoarthritis, Hip"
      ],
      "interventions": [
        {
          "name": "Fasinumab",
          "type": "DRUG"
        },
        {
          "name": "Naproxen",
          "type": "DRUG"
        },
        {
          "name": "Diclofenac",
          "type": "DRUG"
        },
        {
          "name": "Celecoxib",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Regeneron Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 23,
      "start_date": "2019-04-08",
      "completion_date": "2020-08-25",
      "has_results": true,
      "last_update_posted_date": "2023-10-17",
      "last_synced_at": "2026-09-25T16:48:18.713Z",
      "location_count": 6,
      "location_summary": "Phoenix, Arizona • Littleton, Colorado • Jacksonville, Florida + 3 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Littleton",
          "state": "Colorado"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Brooklyn",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03949673"
    },
    {
      "nct_id": "NCT00643799",
      "title": "Safety and Efficacy of Celecoxib Versus Naproxen in the 6-month Treatment of Knee Osteoarthritis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Osteoarthritis, Knee"
      ],
      "interventions": [
        {
          "name": "Celecoxib",
          "type": "DRUG"
        },
        {
          "name": "Naproxen",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer's Upjohn has merged with Mylan to form Viatris Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 586,
      "start_date": "2004-03",
      "completion_date": "2005-01",
      "has_results": false,
      "last_update_posted_date": "2021-02-02",
      "last_synced_at": "2026-09-25T16:48:18.713Z",
      "location_count": 51,
      "location_summary": "Montgomery, Alabama • Phoenix, Arizona • Tempe, Arizona + 41 more",
      "locations": [
        {
          "city": "Montgomery",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Tempe",
          "state": "Arizona"
        },
        {
          "city": "Buena Park",
          "state": "California"
        },
        {
          "city": "Paramount",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00643799"
    }
  ]
}