{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Valacyclovir+500+MG",
    "query": {
      "intervention": "Valacyclovir 500 MG"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 21,
    "total_pages": 3,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Valacyclovir+500+MG&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-10T17:20:43.495Z",
  "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": "NCT01346475",
      "title": "Randomized Trial to Evaluate Suppressive Effect of High-Dose Valacyclovir Versus Once-Daily Valacyclovir on Persons With HSV-2",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Genital Herpes"
      ],
      "interventions": [
        {
          "name": "Valacyclovir",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 50,
      "start_date": "2008-11",
      "completion_date": "2011-09",
      "has_results": true,
      "last_update_posted_date": "2017-03-09",
      "last_synced_at": "2026-09-10T17:20:43.495Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01346475"
    },
    {
      "nct_id": "NCT00587496",
      "title": "30-Day Trial of Oral Valtrex or Valtrex Plus Aspirin on Shedding of HSV DNA in Tears and Saliva of Volunteers",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Herpes Simplex"
      ],
      "interventions": [
        {
          "name": "valacyclovir hydrochloride",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        },
        {
          "name": "valacyclovir plus aspirin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Eye Institute (NEI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "20 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2006-04",
      "completion_date": "2008-07",
      "has_results": false,
      "last_update_posted_date": "2008-01-07",
      "last_synced_at": "2026-09-10T17:20:43.495Z",
      "location_count": 2,
      "location_summary": "New Orleans, Louisiana",
      "locations": [
        {
          "city": "New Orleans",
          "state": "Louisiana"
        },
        {
          "city": "New Orleans",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00587496"
    },
    {
      "nct_id": "NCT01658826",
      "title": "Safety and Efficacy Comparator Trial of a New Drug Against Genital Herpes",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Genital Herpes"
      ],
      "interventions": [
        {
          "name": "AIC316",
          "type": "DRUG"
        },
        {
          "name": "Valacyclovir",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AiCuris Anti-infective Cures AG",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 91,
      "start_date": "2012-10",
      "completion_date": "2013-07",
      "has_results": true,
      "last_update_posted_date": "2023-04-21",
      "last_synced_at": "2026-09-10T17:20:43.495Z",
      "location_count": 4,
      "location_summary": "Indianapolis, Indiana • Portland, Oregon • Houston, Texas + 1 more",
      "locations": [
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Portland",
          "state": "Oregon"
        },
        {
          "city": "Houston",
          "state": "Texas"
        },
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01658826"
    },
    {
      "nct_id": "NCT00803543",
      "title": "Effect of Valacyclovir in the Reduction of HSV-2 Recurrence and Shedding",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "HIV",
        "HIV Infections"
      ],
      "interventions": [
        {
          "name": "Valacyclovir",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Alabama at Birmingham",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "19 Years and older"
      },
      "enrollment_count": 103,
      "start_date": "2009-01",
      "completion_date": "2014-04",
      "has_results": true,
      "last_update_posted_date": "2017-07-13",
      "last_synced_at": "2026-09-10T17:20:43.495Z",
      "location_count": 1,
      "location_summary": "Birmingham, Alabama",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00803543"
    },
    {
      "nct_id": "NCT01580995",
      "title": "Herpes Simplex Type 1 Suppression in Hepatitis C",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Chronic Hepatitis C Infection"
      ],
      "interventions": [
        {
          "name": "Valacyclovir",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "VA Office of Research and Development",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 19,
      "start_date": "2012-04",
      "completion_date": "2015-03",
      "has_results": true,
      "last_update_posted_date": "2016-09-21",
      "last_synced_at": "2026-09-10T17:20:43.495Z",
      "location_count": 1,
      "location_summary": "Jackson, Mississippi",
      "locations": [
        {
          "city": "Jackson",
          "state": "Mississippi"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01580995"
    },
    {
      "nct_id": "NCT04640571",
      "title": "Impact of Metformin and Polysorbate 80 on Drug Absorption and Disposition",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Bile Salt Export Pump (BSEP) Transporter",
        "Polysorbate 80"
      ],
      "interventions": [
        {
          "name": "pravastatin and chenodeoxycholic acid, after metformin and placebo",
          "type": "DRUG"
        },
        {
          "name": "valacyclovir, chenodeoxycholic acid, and enalaprilat, after polysorbate 80 and placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Maryland, Baltimore",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 18,
      "start_date": "2021-04-01",
      "completion_date": "2021-11-01",
      "has_results": true,
      "last_update_posted_date": "2024-07-16",
      "last_synced_at": "2026-09-10T17:20:43.495Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04640571"
    },
    {
      "nct_id": "NCT05712343",
      "title": "The Efficacy of Systemic Valacyclovir (Valtrex) on Periodontitis",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Severe Periodontitis"
      ],
      "interventions": [
        {
          "name": "Valacyclovir group",
          "type": "DRUG"
        },
        {
          "name": "Control group",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 40,
      "start_date": "2023-05-25",
      "completion_date": "2024-03-01",
      "has_results": false,
      "last_update_posted_date": "2023-07-12",
      "last_synced_at": "2026-09-10T17:20:43.495Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05712343"
    },
    {
      "nct_id": "NCT00362297",
      "title": "Randomized Trial to Evaluate Suppressive Effect of High-Dose Acyclovir Versus Once-Daily Valacyclovir on Persons With HSV-2",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Genital Herpes"
      ],
      "interventions": [
        {
          "name": "acyclovir",
          "type": "DRUG"
        },
        {
          "name": "valacyclovir",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 31,
      "start_date": "2006-09",
      "completion_date": "2011-09",
      "has_results": true,
      "last_update_posted_date": "2021-11-18",
      "last_synced_at": "2026-09-10T17:20:43.495Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00362297"
    },
    {
      "nct_id": "NCT00297206",
      "title": "A Safety And Tolerability Study Of Valaciclovir Oral Suspension In Infants And Children",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Herpes Simplex"
      ],
      "interventions": [
        {
          "name": "Valaciclovir",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Month",
        "maximum_age": "6 Years",
        "sex": "ALL",
        "summary": "1 Month to 6 Years"
      },
      "enrollment_count": 36,
      "start_date": "2003-01-25",
      "completion_date": "2007-02-28",
      "has_results": false,
      "last_update_posted_date": "2017-09-11",
      "last_synced_at": "2026-09-10T17:20:43.495Z",
      "location_count": 10,
      "location_summary": "Birmingham, Alabama • Little Rock, Arkansas • San Diego, California + 7 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Lexington",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00297206"
    },
    {
      "nct_id": "NCT00562770",
      "title": "Oral Valganciclovir Versus Valacyclovir",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Chronic Lymphocytic Leukemia",
        "Leukemia"
      ],
      "interventions": [
        {
          "name": "Valganciclovir",
          "type": "DRUG"
        },
        {
          "name": "Valacyclovir",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "16 Years and older"
      },
      "enrollment_count": 46,
      "start_date": "2003-09",
      "completion_date": "2006-07",
      "has_results": false,
      "last_update_posted_date": "2012-07-31",
      "last_synced_at": "2026-09-10T17:20:43.495Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00562770"
    }
  ]
}