{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Sodium+4-Phenylbutyrate&page=2",
    "query": {
      "intervention": "Sodium 4-Phenylbutyrate",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 40,
    "total_pages": 4,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Sodium+4-Phenylbutyrate&page=3&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Sodium+4-Phenylbutyrate&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-06T20:55:12.273Z",
  "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": "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": "2026-10-06T20:55:12.273Z",
      "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": "NCT00006019",
      "title": "Phenylbutyrate Plus Azacitidine in Treating Patients With Acute Myeloid Leukemia, Myelodysplasia, Non-Hodgkin's Lymphoma, Multiple Myeloma, Non-small Cell Lung Cancer, or Prostate Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Leukemia",
        "Lung Cancer",
        "Lymphoma",
        "Multiple Myeloma and Plasma Cell Neoplasm",
        "Myelodysplastic Syndromes",
        "Prostate Cancer"
      ],
      "interventions": [
        {
          "name": "azacitidine",
          "type": "DRUG"
        },
        {
          "name": "sodium phenylbutyrate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": null,
      "start_date": "2000-05",
      "completion_date": "2003-08",
      "has_results": false,
      "last_update_posted_date": "2013-06-24",
      "last_synced_at": "2026-10-06T20:55:12.273Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00006019"
    },
    {
      "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": "2026-10-06T20:55:12.273Z",
      "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": "NCT03488524",
      "title": "Open Label Extension Study of AMX0035 in Patients With ALS",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Amyotrophic Lateral Sclerosis",
        "ALS"
      ],
      "interventions": [
        {
          "name": "AMX0035",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Amylyx Pharmaceuticals Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 90,
      "start_date": "2018-03-29",
      "completion_date": "2021-03-01",
      "has_results": true,
      "last_update_posted_date": "2025-08-13",
      "last_synced_at": "2026-10-06T20:55:12.273Z",
      "location_count": 24,
      "location_summary": "Phoenix, Arizona • Orange, California • San Francisco, California + 20 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03488524"
    },
    {
      "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": "2026-10-06T20:55:12.273Z",
      "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": "NCT02111200",
      "title": "Comparative Efficacy of Phenylbutyrate (PBA) vs. Benzoate in Urea Cycle Disorders",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Urea Cycle Disorders, Inborn"
      ],
      "interventions": [
        {
          "name": "Sodium Benzoate",
          "type": "DRUG"
        },
        {
          "name": "Sodium Phenylbutyrate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Baylor College of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "64 Years",
        "sex": "ALL",
        "summary": "18 Years to 64 Years"
      },
      "enrollment_count": 7,
      "start_date": "2014-09",
      "completion_date": "2015-10",
      "has_results": true,
      "last_update_posted_date": "2018-01-09",
      "last_synced_at": "2026-10-06T20:55:12.273Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02111200"
    },
    {
      "nct_id": "NCT05286372",
      "title": "An Intermediate Size Expanded Access Protocol of AMX0035 for ALS",
      "overall_status": "APPROVED_FOR_MARKETING",
      "study_type": "EXPANDED_ACCESS",
      "phases": [],
      "conditions": [
        "Amyotrophic Lateral Sclerosis"
      ],
      "interventions": [
        {
          "name": "AMX0035",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Amylyx Pharmaceuticals Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": null,
      "start_date": null,
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2022-10-18",
      "last_synced_at": "2026-10-06T20:55:12.273Z",
      "location_count": 20,
      "location_summary": "Los Angeles, California • Oakland, California • Fort Lauderdale, Florida + 14 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "Fort Lauderdale",
          "state": "Florida"
        },
        {
          "city": "Fort Lauderdale",
          "state": "Florida"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05286372"
    },
    {
      "nct_id": "NCT00439218",
      "title": "Clinical Trial of Sodium Phenylbutyrate in Children With Spinal Muscular Atrophy Type I",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Spinal Muscular Atrophy Type I"
      ],
      "interventions": [
        {
          "name": "sodium phenylbutyrate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Westat",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Months",
        "maximum_age": "48 Months",
        "sex": "ALL",
        "summary": "2 Months to 48 Months"
      },
      "enrollment_count": 5,
      "start_date": "2008-01",
      "completion_date": "2009-05",
      "has_results": true,
      "last_update_posted_date": "2010-11-09",
      "last_synced_at": "2026-10-06T20:55:12.273Z",
      "location_count": 5,
      "location_summary": "Stanford, California • Boston, Massachusetts • New York, New York + 2 more",
      "locations": [
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        },
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00439218"
    },
    {
      "nct_id": "NCT00006239",
      "title": "Phenylbutyrate and Tretinoin in Treating Patients With Hematologic Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Leukemia",
        "Myelodysplastic Syndromes",
        "Myelodysplastic/Myeloproliferative Diseases"
      ],
      "interventions": [
        {
          "name": "sodium phenylbutyrate",
          "type": "DRUG"
        },
        {
          "name": "tretinoin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "120 Years",
        "sex": "ALL",
        "summary": "18 Years to 120 Years"
      },
      "enrollment_count": null,
      "start_date": "2000-12",
      "completion_date": "2005-03",
      "has_results": false,
      "last_update_posted_date": "2017-09-29",
      "last_synced_at": "2026-10-06T20:55:12.273Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00006239"
    },
    {
      "nct_id": "NCT00771901",
      "title": "Effect of Endoplasmic Reticulum Stress on Metabolic Function",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Insulin Resistance",
        "Diabetes",
        "Obesity"
      ],
      "interventions": [
        {
          "name": "tauroursodeoxycholic acid",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "OTHER"
        },
        {
          "name": "sodium phenylbutyrate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Washington University School of Medicine",
      "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": 101,
      "start_date": "2008-02",
      "completion_date": "2014-12",
      "has_results": true,
      "last_update_posted_date": "2018-05-29",
      "last_synced_at": "2026-10-06T20:55:12.273Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00771901"
    }
  ]
}