{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Sildenafil+citrate+%28Viagra%29&page=7",
    "query": {
      "intervention": "Sildenafil citrate (Viagra)",
      "page": 7
    },
    "page_size": 10
  },
  "pagination": {
    "page": 7,
    "page_size": 10,
    "total_count": 177,
    "total_pages": 18,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Sildenafil+citrate+%28Viagra%29&page=8&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Sildenafil+citrate+%28Viagra%29&page=6&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-14T15:16:57.145Z",
  "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": "NCT00734604",
      "title": "A Study for Patients With Erectile Dysfunction to Test Whether Tadalafil Taken Once a Day Can Better Improve Psychological Outcomes.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Erectile Dysfunction"
      ],
      "interventions": [
        {
          "name": "tadalafil once a day [T(OaD)]",
          "type": "DRUG"
        },
        {
          "name": "sildenafil citrate as needed [S(PRN)]",
          "type": "DRUG"
        },
        {
          "name": "tadalafil as needed [T(PRN)]",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Eli Lilly and Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 378,
      "start_date": "2008-08",
      "completion_date": "2009-09",
      "has_results": true,
      "last_update_posted_date": "2010-11-18",
      "last_synced_at": "2026-10-14T15:16:57.145Z",
      "location_count": 7,
      "location_summary": "Huntsville, Alabama • Newport Beach, California • Middlebury, Connecticut + 4 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Newport Beach",
          "state": "California"
        },
        {
          "city": "Middlebury",
          "state": "Connecticut"
        },
        {
          "city": "Plantation",
          "state": "Florida"
        },
        {
          "city": "Knoxville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00734604"
    },
    {
      "nct_id": "NCT04770155",
      "title": "Vascular Dysfunction in Black Individuals: Roles of Nitric Oxide and Endothelin-1",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Vascular Function",
        "Racial Disparity"
      ],
      "interventions": [
        {
          "name": "Dietary Nitrates 400 mg",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "L-citrulline 3 g",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Sildenafil 100 mg",
          "type": "DRUG"
        },
        {
          "name": "Bosentan 125 mg",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "DRUG"
      ],
      "sponsor": "University of Mississippi Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 8,
      "start_date": "2021-05-27",
      "completion_date": "2021-09-20",
      "has_results": true,
      "last_update_posted_date": "2023-10-31",
      "last_synced_at": "2026-10-14T15:16:57.145Z",
      "location_count": 1,
      "location_summary": "Jackson, Mississippi",
      "locations": [
        {
          "city": "Jackson",
          "state": "Mississippi"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04770155"
    },
    {
      "nct_id": "NCT02466802",
      "title": "Study of Regorafenib and Sildenafil for Advanced Solid Tumors",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Solid Tumor"
      ],
      "interventions": [
        {
          "name": "Regorafenib",
          "type": "DRUG"
        },
        {
          "name": "Sildenafil Citrate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Virginia Commonwealth University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 32,
      "start_date": "2015-07-01",
      "completion_date": "2019-01-28",
      "has_results": false,
      "last_update_posted_date": "2020-02-20",
      "last_synced_at": "2026-10-14T15:16:57.145Z",
      "location_count": 1,
      "location_summary": "Richmond, Virginia",
      "locations": [
        {
          "city": "Richmond",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02466802"
    },
    {
      "nct_id": "NCT00848497",
      "title": "Testosterone for Penile Rehabilitation After Radical Prostatectomy",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Hypogonadism",
        "Erectile Dysfunction"
      ],
      "interventions": [
        {
          "name": "Testim®",
          "type": "DRUG"
        },
        {
          "name": "Placebo Testim®",
          "type": "OTHER"
        },
        {
          "name": "Viagra®",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Mohit Khera",
      "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": 3,
      "start_date": "2007-11",
      "completion_date": "2013-03",
      "has_results": true,
      "last_update_posted_date": "2015-06-19",
      "last_synced_at": "2026-10-14T15:16:57.145Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00848497"
    },
    {
      "nct_id": "NCT02908490",
      "title": "Does Sildenafil Improve Endothelial Dysfunction in Rheumatoid Arthritis?",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Arthritis, Rheumatoid",
        "Atherosclerosis"
      ],
      "interventions": [
        {
          "name": "Sildenafil",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Kimberly Liang",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 25,
      "start_date": "2017-04-01",
      "completion_date": "2020-12-31",
      "has_results": true,
      "last_update_posted_date": "2021-08-13",
      "last_synced_at": "2026-10-14T15:16:57.145Z",
      "location_count": 1,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02908490"
    },
    {
      "nct_id": "NCT00343200",
      "title": "A Study Of The Safety and Efficacy Of Viagra In Men With Erectile Dysfunction Who Do Not Self Identify.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Impotence"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Viagra (sildenafil citrate)",
          "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": "30 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "30 Years and older · Male only"
      },
      "enrollment_count": 371,
      "start_date": "2006-07",
      "completion_date": "2007-09",
      "has_results": false,
      "last_update_posted_date": "2021-02-01",
      "last_synced_at": "2026-10-14T15:16:57.145Z",
      "location_count": 48,
      "location_summary": "Huntsville, Alabama • Mesa, Arizona • Phoenix, Arizona + 42 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Anaheim",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00343200"
    },
    {
      "nct_id": "NCT01063855",
      "title": "Concomitant Use of PriLigy in Men Treated for Erectile Dysfunction",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Erectile Dysfunction",
        "Sexual Dysfunction"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Dapoxetine",
          "type": "DRUG"
        },
        {
          "name": "PDE5I (phosphodiesterase-5 inhibitor)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Johnson & Johnson Pharmaceutical Research & Development, L.L.C.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 495,
      "start_date": "2010-04",
      "completion_date": "2011-09",
      "has_results": true,
      "last_update_posted_date": "2013-01-24",
      "last_synced_at": "2026-10-14T15:16:57.145Z",
      "location_count": 19,
      "location_summary": "Decatur, Alabama • Huntsville, Alabama • Englewood, Colorado + 16 more",
      "locations": [
        {
          "city": "Decatur",
          "state": "Alabama"
        },
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Englewood",
          "state": "Colorado"
        },
        {
          "city": "Aventura",
          "state": "Florida"
        },
        {
          "city": "Clearwater",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01063855"
    },
    {
      "nct_id": "NCT00867815",
      "title": "PDE5 Inhibitor Use and Non-arteritic Anterior Ischemic Optic Neuropathy (NAION)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Anterior Ischemic Optic Neuropathy"
      ],
      "interventions": [
        {
          "name": "Diagnostic procedures",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bayer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "40 Years and older · Male only"
      },
      "enrollment_count": 10,
      "start_date": "2009-07-13",
      "completion_date": "2018-03-28",
      "has_results": true,
      "last_update_posted_date": "2019-01-23",
      "last_synced_at": "2026-10-14T15:16:57.145Z",
      "location_count": 11,
      "location_summary": "Vista, California • Atlantis, Florida • Fort Myers, Florida + 7 more",
      "locations": [
        {
          "city": "Vista",
          "state": "California"
        },
        {
          "city": "Atlantis",
          "state": "Florida"
        },
        {
          "city": "Fort Myers",
          "state": "Florida"
        },
        {
          "city": "Fort Myers",
          "state": "Florida"
        },
        {
          "city": "Sarasota",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00867815"
    },
    {
      "nct_id": "NCT00906269",
      "title": "Can Hyperbaric Oxygen Improve Erectile Function Following Surgery for Prostate Cancer",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Impotence",
        "Prostatic Neoplasms"
      ],
      "interventions": [
        {
          "name": "Sildenafil therapy plus post-NSRRP HBO2T",
          "type": "DRUG"
        },
        {
          "name": "Sildenafil therapy plus sham post-NSRRP HBO2T",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Hartford Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "65 Years",
        "sex": "MALE",
        "summary": "40 Years to 65 Years · Male only"
      },
      "enrollment_count": 100,
      "start_date": "2009-07",
      "completion_date": "2021-01",
      "has_results": false,
      "last_update_posted_date": "2019-05-20",
      "last_synced_at": "2026-10-14T15:16:57.145Z",
      "location_count": 1,
      "location_summary": "Hartford, Connecticut",
      "locations": [
        {
          "city": "Hartford",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00906269"
    },
    {
      "nct_id": "NCT00796666",
      "title": "Study Looking at Combination Therapy (Sitaxsentan+Sildenafil) Vs. Monotherapy (Sitaxsentan Alone) SR-PAAS -Sitaxsentan Efficacy And Safety Trial With A Randomized Prospective Assessment Of Adding Sildenafil",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Pulmonary Arterial Hypertension",
        "Pulmonary Hypertension"
      ],
      "interventions": [
        {
          "name": "Sitaxsentan",
          "type": "DRUG"
        },
        {
          "name": "Sitaxsentan and Sildenafil",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "16 Years to 80 Years"
      },
      "enrollment_count": 131,
      "start_date": "2009-05",
      "completion_date": "2011-03",
      "has_results": true,
      "last_update_posted_date": "2015-03-24",
      "last_synced_at": "2026-10-14T15:16:57.145Z",
      "location_count": 12,
      "location_summary": "Fountain Valley, California • Gainesville, Florida • Weston, Florida + 9 more",
      "locations": [
        {
          "city": "Fountain Valley",
          "state": "California"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Weston",
          "state": "Florida"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00796666"
    }
  ]
}