{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Guanfacine+extended+release+%28GXR%29",
    "query": {
      "intervention": "Guanfacine extended release (GXR)"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 6,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-10-05T02:48:33.067Z",
  "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": "NCT04066088",
      "title": "Dose Clinical Trial of Guanfacine Extended Release for the Reduction of Aggression and Self-injuries Behavior Associated With Prader-Willi Syndrome",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Prader-Willi Syndrome"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "OTHER"
        },
        {
          "name": "Guanfacine extended release (GXR)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DRUG"
      ],
      "sponsor": "NYU Langone Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "35 Years",
        "sex": "ALL",
        "summary": "6 Years to 35 Years"
      },
      "enrollment_count": 0,
      "start_date": "2019-12-01",
      "completion_date": "2020-08-21",
      "has_results": false,
      "last_update_posted_date": "2020-08-26",
      "last_synced_at": "2026-10-05T02:48:33.067Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04066088"
    },
    {
      "nct_id": "NCT01069523",
      "title": "Electrophysiological Effects of Guanfacine Extended Release in Attention Deficit Hyperactivity Disorder (ADHD)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Attention Deficit Disorder With Hyperactivity"
      ],
      "interventions": [
        {
          "name": "Guanfacine Extended Release",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "The University of Texas Health Science Center at San Antonio",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "12 Years",
        "sex": "ALL",
        "summary": "6 Years to 12 Years"
      },
      "enrollment_count": 42,
      "start_date": "2010-03",
      "completion_date": "2011-08",
      "has_results": true,
      "last_update_posted_date": "2012-09-03",
      "last_synced_at": "2026-10-05T02:48:33.067Z",
      "location_count": 1,
      "location_summary": "San Antonio, Texas",
      "locations": [
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01069523"
    },
    {
      "nct_id": "NCT02259517",
      "title": "An fMRI Study of Stimulant vs. Non-Stimulant Treatment of ADHD",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Attention Deficit Hyperactivity Disorder"
      ],
      "interventions": [
        {
          "name": "Guanfacine",
          "type": "DRUG"
        },
        {
          "name": "Lisdexamfetamine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "New York State Psychiatric Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "6 Years to 17 Years"
      },
      "enrollment_count": 38,
      "start_date": "2014-09",
      "completion_date": "2021-11-06",
      "has_results": true,
      "last_update_posted_date": "2023-02-02",
      "last_synced_at": "2026-10-05T02:48:33.067Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02259517"
    },
    {
      "nct_id": "NCT01709695",
      "title": "Neurobiological Basis of Response to Guanfacine Extended Release in Children and Adolescents With ADHD",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "ADHD",
        "Attention Deficit Hyperactivity Disorder"
      ],
      "interventions": [
        {
          "name": "Guanfacine Hydrochloride XR",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Icahn School of Medicine at Mount Sinai",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "8 Years",
        "maximum_age": "15 Years",
        "sex": "ALL",
        "summary": "8 Years to 15 Years"
      },
      "enrollment_count": 27,
      "start_date": "2011-03",
      "completion_date": "2013-12",
      "has_results": true,
      "last_update_posted_date": "2018-02-14",
      "last_synced_at": "2026-10-05T02:48:33.067Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01709695"
    },
    {
      "nct_id": "NCT03258476",
      "title": "Guanfacine Extended Release and Mindfulness Skills Therapy",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Stress Disorder"
      ],
      "interventions": [
        {
          "name": "Guanfacine Extended Release",
          "type": "DRUG"
        },
        {
          "name": "Mindfulness Skills Therapy",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BEHAVIORAL"
      ],
      "sponsor": "UConn Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "10 Years",
        "maximum_age": "20 Years",
        "sex": "ALL",
        "summary": "10 Years to 20 Years"
      },
      "enrollment_count": 0,
      "start_date": "2019-03-01",
      "completion_date": "2019-12-03",
      "has_results": false,
      "last_update_posted_date": "2021-03-08",
      "last_synced_at": "2026-10-05T02:48:33.067Z",
      "location_count": 1,
      "location_summary": "Farmington, Connecticut",
      "locations": [
        {
          "city": "Farmington",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03258476"
    },
    {
      "nct_id": "NCT05657860",
      "title": "Guanfacine Extended Release for the Reduction of Aggression and Self-injurious Behavior Associated With Prader-Willi Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Prader-Willi Syndrome",
        "Aggression",
        "Self-Injurious Behavior",
        "Pathologic Processes",
        "Behavioral Symptoms",
        "Intellectual Disability",
        "Neurobehavioral Manifestations",
        "Neurologic Manifestations",
        "Nervous System Diseases",
        "Abnormalities, Multiple",
        "Congenital Abnormalities",
        "Chromosome Disorders",
        "Genetic Diseases, Inborn",
        "Obesity",
        "Overnutrition",
        "Nutrition Disorders",
        "Antihypertensive Agents",
        "Neurotransmitter Agents",
        "Molecular Mechanisms of Pharmacological Action",
        "Physiological Effects of Drugs",
        "Skin-Picking"
      ],
      "interventions": [
        {
          "name": "Guanfacine Extended Release",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Maimonides Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "35 Years",
        "sex": "ALL",
        "summary": "6 Years to 35 Years"
      },
      "enrollment_count": 15,
      "start_date": "2020-12-17",
      "completion_date": "2023-12-16",
      "has_results": false,
      "last_update_posted_date": "2024-08-19",
      "last_synced_at": "2026-10-05T02:48:33.067Z",
      "location_count": 1,
      "location_summary": "Brooklyn, New York",
      "locations": [
        {
          "city": "Brooklyn",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05657860"
    }
  ]
}