{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=NaPBA",
    "query": {
      "intervention": "NaPBA"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 8,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-08T00:42:28.171Z",
  "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": "NCT00992459",
      "title": "Efficacy and Safety of HPN-100 for the Treatment of Adults With Urea Cycle Disorders",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Urea Cycle Disorders"
      ],
      "interventions": [
        {
          "name": "HPN-100",
          "type": "DRUG"
        },
        {
          "name": "Buphenyl (NaPBA)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Amgen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 46,
      "start_date": "2009-10",
      "completion_date": "2010-09",
      "has_results": true,
      "last_update_posted_date": "2024-07-09",
      "last_synced_at": "2026-09-08T00:42:28.171Z",
      "location_count": 21,
      "location_summary": "Long Beach, California • Los Angeles, California • Stanford, California + 18 more",
      "locations": [
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00992459"
    },
    {
      "nct_id": "NCT01257737",
      "title": "To Evaluate the Safety of Long-term Use of HPN-100 in the Management of Urea Cycle Disorders (UCDs)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Urea Cycle Disorders"
      ],
      "interventions": [
        {
          "name": "HPN-100",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Amgen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "1 Year and older"
      },
      "enrollment_count": 88,
      "start_date": "2010-10-04",
      "completion_date": "2017-02-16",
      "has_results": true,
      "last_update_posted_date": "2024-08-22",
      "last_synced_at": "2026-09-08T00:42:28.171Z",
      "location_count": 15,
      "location_summary": "Los Angeles, California • Palo Alto, California • Aurora, Colorado + 12 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Portland",
          "state": "Maine"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01257737"
    },
    {
      "nct_id": "NCT00947297",
      "title": "Study of the Safety of HPN (Hyperion)-100 for the Long-Term Treatment of Urea Cycle Disorders (Treat UCD)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Urea Cycle Disorders"
      ],
      "interventions": [
        {
          "name": "HPN-100",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Amgen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "6 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2009-11",
      "completion_date": "2011-11",
      "has_results": true,
      "last_update_posted_date": "2024-07-10",
      "last_synced_at": "2026-09-08T00:42:28.171Z",
      "location_count": 21,
      "location_summary": "Long Beach, California • Los Angeles, California • Stanford, California + 18 more",
      "locations": [
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00947297"
    },
    {
      "nct_id": "NCT01347073",
      "title": "Study of the Safety, Pharmacokinetics and Efficacy of HPN-100, in Pediatric Subjects With Urea Cycle Disorders (UCDs)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Urea Cycle Disorders"
      ],
      "interventions": [
        {
          "name": "HPN-100",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Amgen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "29 Days",
        "maximum_age": "6 Years",
        "sex": "ALL",
        "summary": "29 Days to 6 Years"
      },
      "enrollment_count": 23,
      "start_date": "2011-07",
      "completion_date": "2013-03",
      "has_results": true,
      "last_update_posted_date": "2024-07-11",
      "last_synced_at": "2026-09-08T00:42:28.171Z",
      "location_count": 8,
      "location_summary": "Los Angeles, California • Washington D.C., District of Columbia • Portland, Maine + 5 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Portland",
          "state": "Maine"
        },
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01347073"
    },
    {
      "nct_id": "NCT00551200",
      "title": "Dose-Escalation Safety Study of HPN-100 to Treat Urea Cycle Disorders",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Urea Cycle Disorders"
      ],
      "interventions": [
        {
          "name": "HPN-100",
          "type": "DRUG"
        },
        {
          "name": "BUPHENYL®",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Amgen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 14,
      "start_date": "2007-10",
      "completion_date": "2008-12",
      "has_results": true,
      "last_update_posted_date": "2024-07-10",
      "last_synced_at": "2026-09-08T00:42:28.171Z",
      "location_count": 2,
      "location_summary": "Minneapolis, Minnesota • Houston, Texas",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00551200"
    },
    {
      "nct_id": "NCT00345605",
      "title": "Arginine and Buphenyl in Patients With Argininosuccinic Aciduria (ASA), a Urea Cycle Disorder",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Argininosuccinic Aciduria",
        "Amino Acid Metabolism, Inborn Errors",
        "Urea Cycle Disorders"
      ],
      "interventions": [
        {
          "name": "Sodium Phenylbutyrate",
          "type": "DRUG"
        },
        {
          "name": "Arginine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Brendan Lee",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "5 Years and older"
      },
      "enrollment_count": 12,
      "start_date": "2008-02",
      "completion_date": "2012-11",
      "has_results": true,
      "last_update_posted_date": "2018-01-31",
      "last_synced_at": "2026-09-08T00:42:28.171Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00345605"
    },
    {
      "nct_id": "NCT03335488",
      "title": "Study of Glycerol Phenylbutyrate & Sodium Phenylbutyrate in Phenylbutyrate Naïve Patients With Urea Cycle Disorders (UCDs)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Urea Cycle Disorder"
      ],
      "interventions": [
        {
          "name": "RAVICTI",
          "type": "DRUG"
        },
        {
          "name": "NaPBA",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Amgen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "Up to 99 Years"
      },
      "enrollment_count": 16,
      "start_date": "2018-02-20",
      "completion_date": "2022-12-20",
      "has_results": true,
      "last_update_posted_date": "2024-07-01",
      "last_synced_at": "2026-09-08T00:42:28.171Z",
      "location_count": 6,
      "location_summary": "Gainesville, Florida • New York, New York • Cleveland, Ohio + 3 more",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        },
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        },
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03335488"
    },
    {
      "nct_id": "NCT00947544",
      "title": "Study of the Safety and Tolerability of HPN-100 Compared to Sodium Phenylbutyrate in Children With Urea Cycle Disorders",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Urea Cycle Disorders"
      ],
      "interventions": [
        {
          "name": "HPN-100",
          "type": "DRUG"
        },
        {
          "name": "NaPBA",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Amgen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "6 Years to 17 Years"
      },
      "enrollment_count": 17,
      "start_date": "2010-03",
      "completion_date": "2011-08",
      "has_results": true,
      "last_update_posted_date": "2024-07-11",
      "last_synced_at": "2026-09-08T00:42:28.171Z",
      "location_count": 7,
      "location_summary": "Los Angeles, California • Washington D.C., District of Columbia • New York, New York + 4 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00947544"
    }
  ]
}