{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Naproxen+placebo",
    "query": {
      "intervention": "Naproxen placebo"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 115,
    "total_pages": 12,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Naproxen+placebo&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-09T06:29:49.146Z",
  "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": "NCT03879408",
      "title": "Naproxen Sodium/Acetaminophen Proof of Concept Dosing Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Pain"
      ],
      "interventions": [
        {
          "name": "440 mg naproxen sodium with 1000 mg acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "220 mg naproxen sodium with 650 mg acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "10 mg hydrocodone + 650 mg acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "440 mg naproxen sodium",
          "type": "DRUG"
        },
        {
          "name": "Placebo tablet",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Johnson & Johnson Consumer Inc., McNeil Consumer Healthcare Division",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "17 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "17 Years to 50 Years"
      },
      "enrollment_count": 290,
      "start_date": "2019-05-28",
      "completion_date": "2019-11-13",
      "has_results": true,
      "last_update_posted_date": "2022-12-05",
      "last_synced_at": "2026-09-09T06:29:49.146Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03879408"
    },
    {
      "nct_id": "NCT01280591",
      "title": "Evaluate Analgesic/Sedative Efficacy of Naproxen Sodium and Diphenhydramine in Patients With Postsurgical Dental Pain",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Pain, Postoperative"
      ],
      "interventions": [
        {
          "name": "Naproxen sodium 440 mg / DPH 50 mg (BAY98-7111)",
          "type": "DRUG"
        },
        {
          "name": "Naproxen sodium 220 mg / DPH 50 mg (BAY98-7111)",
          "type": "DRUG"
        },
        {
          "name": "Naproxen sodium 440 mg (BAYH6689)",
          "type": "DRUG"
        },
        {
          "name": "DPH 50 mg",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bayer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "45 Years",
        "sex": "ALL",
        "summary": "12 Years to 45 Years"
      },
      "enrollment_count": 712,
      "start_date": "2010-10",
      "completion_date": "2011-02",
      "has_results": true,
      "last_update_posted_date": "2015-06-08",
      "last_synced_at": "2026-09-09T06:29:49.146Z",
      "location_count": 2,
      "location_summary": "Austin, Texas • Salt Lake City, Utah",
      "locations": [
        {
          "city": "Austin",
          "state": "Texas"
        },
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01280591"
    },
    {
      "nct_id": "NCT00240630",
      "title": "Treximet (Sumatriptan/Naproxen Sodium), Formerly Known as Trexima, In The Acute Treatment Of Multiple Migraine Attacks",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Migraine Disorders",
        "Migraine"
      ],
      "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": 646,
      "start_date": "2005-10",
      "completion_date": "2006-06",
      "has_results": false,
      "last_update_posted_date": "2015-04-16",
      "last_synced_at": "2026-09-09T06:29:49.146Z",
      "location_count": 50,
      "location_summary": "Chandler, Arizona • Phoenix, Arizona • Little Rock, Arkansas + 45 more",
      "locations": [
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Irvine",
          "state": "California"
        },
        {
          "city": "Newport Beach",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00240630"
    },
    {
      "nct_id": "NCT00504127",
      "title": "Efficacy and Safety Study of Naproxcinod in Subjects With Osteoarthritis of the Knee",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Osteoarthritis"
      ],
      "interventions": [
        {
          "name": "Naproxcinod 375 mg bid",
          "type": "DRUG"
        },
        {
          "name": "Naproxcinod 750 mg bid",
          "type": "DRUG"
        },
        {
          "name": "Naproxen 500 mg bid",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "NicOx",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 1020,
      "start_date": "2007-04",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2011-06-17",
      "last_synced_at": "2026-09-09T06:29:49.146Z",
      "location_count": 73,
      "location_summary": "Chandler, Arizona • Tempe, Arizona • Tucson, Arizona + 70 more",
      "locations": [
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Tempe",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Anaheim",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00504127"
    },
    {
      "nct_id": "NCT05900336",
      "title": "Non-Steroidal Anti-Inflammatory Drug (NSAID) Response and Central Sensitization of Pain in Women With Dysmenorrhea",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Dysmenorrhea",
        "Menstrual Pain",
        "Non-steroidal Anti-inflammatory Drug"
      ],
      "interventions": [
        {
          "name": "Sodium Naproxen",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Mclean Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 50 Years · Female only"
      },
      "enrollment_count": 70,
      "start_date": "2024-03-25",
      "completion_date": "2025-08-01",
      "has_results": false,
      "last_update_posted_date": "2026-02-13",
      "last_synced_at": "2026-09-09T06:29:49.146Z",
      "location_count": 1,
      "location_summary": "Belmont, Massachusetts",
      "locations": [
        {
          "city": "Belmont",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05900336"
    },
    {
      "nct_id": "NCT00541489",
      "title": "Efficacy and Safety Study of Naproxcinod in Subjects With Osteoarthritis of the Hip",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Osteoarthritis",
        "Osteoarthritis, Hip"
      ],
      "interventions": [
        {
          "name": "Naproxcinod",
          "type": "DRUG"
        },
        {
          "name": "Naproxen",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "NicOx",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 800,
      "start_date": "2007-06",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2009-02-20",
      "last_synced_at": "2026-09-09T06:29:49.146Z",
      "location_count": 36,
      "location_summary": "Mobile, Alabama • Montgomery, Alabama • Tuscaloosa, Alabama + 33 more",
      "locations": [
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Montgomery",
          "state": "Alabama"
        },
        {
          "city": "Tuscaloosa",
          "state": "Alabama"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00541489"
    },
    {
      "nct_id": "NCT00383162",
      "title": "A Study of Combination Product (Sumatriptan Succinate and Naproxen Sodium) in Migraine Subjects Who Report Poor Response or Intolerance to Short Acting Triptans (Study 1 of 2)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Migraine Disorders"
      ],
      "interventions": [
        {
          "name": "Combination Product (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": 173,
      "start_date": "2006-11",
      "completion_date": "2007-10",
      "has_results": true,
      "last_update_posted_date": "2017-02-02",
      "last_synced_at": "2026-09-09T06:29:49.146Z",
      "location_count": 26,
      "location_summary": "Fresno, California • Newport Beach, California • Santa Monica, California + 23 more",
      "locations": [
        {
          "city": "Fresno",
          "state": "California"
        },
        {
          "city": "Newport Beach",
          "state": "California"
        },
        {
          "city": "Santa Monica",
          "state": "California"
        },
        {
          "city": "Walnut Creek",
          "state": "California"
        },
        {
          "city": "Fairfield",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00383162"
    },
    {
      "nct_id": "NCT05485805",
      "title": "A Study to Learn How Well a Single Dose of the Study Treatment Naproxen Sodium and Caffeine Combined in One Tablet (Fixed-dose Combination) Works to Relieve Pain After Dental Surgeries Compared to the Single Ingredients and to Placebo",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Postoperative Dental Pain"
      ],
      "interventions": [
        {
          "name": "Naproxen sodium and 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": true,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "16 Years and older"
      },
      "enrollment_count": 541,
      "start_date": "2022-09-21",
      "completion_date": "2024-01-29",
      "has_results": true,
      "last_update_posted_date": "2025-03-25",
      "last_synced_at": "2026-09-09T06:29:49.146Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05485805"
    },
    {
      "nct_id": "NCT00584870",
      "title": "RN624 In Adult Patients With Chronic Low Back Pain",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Low Back Pain"
      ],
      "interventions": [
        {
          "name": "Naproxen",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "PF-04383119 (RN624)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "18 Years to 90 Years"
      },
      "enrollment_count": 220,
      "start_date": "2007-07-05",
      "completion_date": "2008-09-02",
      "has_results": true,
      "last_update_posted_date": "2021-07-12",
      "last_synced_at": "2026-09-09T06:29:49.146Z",
      "location_count": 38,
      "location_summary": "Anniston, Alabama • Birmingham, Alabama • Chandler, Arizona + 30 more",
      "locations": [
        {
          "city": "Anniston",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Anaheim",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00584870"
    },
    {
      "nct_id": "NCT00778193",
      "title": "Effect of Naproxen, Aspirin, Celecoxib, or Clopidogrel on the Healing of Stomach and Intestinal Ulcers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Gastroduodenal Ulcer"
      ],
      "interventions": [
        {
          "name": "Naproxen",
          "type": "DRUG"
        },
        {
          "name": "Aspirin",
          "type": "DRUG"
        },
        {
          "name": "Celecoxib",
          "type": "DRUG"
        },
        {
          "name": "Clopidogrel",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Research Associates of New York, LLP",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 125,
      "start_date": "2007-10",
      "completion_date": "2008-03",
      "has_results": false,
      "last_update_posted_date": "2008-10-23",
      "last_synced_at": "2026-09-09T06:29:49.146Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00778193"
    }
  ]
}