{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=L-Tryptophan&page=2",
    "query": {
      "intervention": "L-Tryptophan",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=L-Tryptophan&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-24T10:42:24.865Z",
  "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": "NCT04513717",
      "title": "Two Studies for Patients With High Risk Prostate Cancer Testing Less Intense Treatment for Patients With a Low Gene Risk Score and Testing a More Intense Treatment for Patients With a High Gene Risk Score, The PREDICT-RT Trial",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Prostate Adenocarcinoma",
        "Stage III Prostate Cancer AJCC v8",
        "Stage IVA Prostate Cancer AJCC v8"
      ],
      "interventions": [
        {
          "name": "Apalutamide",
          "type": "DRUG"
        },
        {
          "name": "Bicalutamide",
          "type": "DRUG"
        },
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Bone Scan",
          "type": "PROCEDURE"
        },
        {
          "name": "Buserelin",
          "type": "DRUG"
        },
        {
          "name": "Computed Tomography",
          "type": "PROCEDURE"
        },
        {
          "name": "Degarelix",
          "type": "DRUG"
        },
        {
          "name": "Flutamide",
          "type": "DRUG"
        },
        {
          "name": "Goserelin",
          "type": "DRUG"
        },
        {
          "name": "Histrelin",
          "type": "DRUG"
        },
        {
          "name": "Leuprolide",
          "type": "DRUG"
        },
        {
          "name": "Magnetic Resonance Elastography",
          "type": "PROCEDURE"
        },
        {
          "name": "Positron Emission Tomography",
          "type": "PROCEDURE"
        },
        {
          "name": "Quality-of-Life Assessment",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        },
        {
          "name": "Radiation Therapy",
          "type": "RADIATION"
        },
        {
          "name": "Relugolix",
          "type": "DRUG"
        },
        {
          "name": "Triptorelin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE",
        "OTHER",
        "RADIATION"
      ],
      "sponsor": "NRG Oncology",
      "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": 2753,
      "start_date": "2021-01-21",
      "completion_date": "2038-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-08-17",
      "last_synced_at": "2026-09-24T10:42:24.865Z",
      "location_count": 594,
      "location_summary": "Fairbanks, Alaska • Gilbert, Arizona • Peoria, Arizona + 438 more",
      "locations": [
        {
          "city": "Fairbanks",
          "state": "Alaska"
        },
        {
          "city": "Gilbert",
          "state": "Arizona"
        },
        {
          "city": "Gilbert",
          "state": "Arizona"
        },
        {
          "city": "Peoria",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04513717"
    },
    {
      "nct_id": "NCT02502708",
      "title": "Study of the IDO Pathway Inhibitor, Indoximod, and Temozolomide for Pediatric Patients With Progressive Primary Malignant Brain Tumors",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Glioblastoma Multiforme",
        "Glioma",
        "Gliosarcoma",
        "Malignant Brain Tumor",
        "Ependymoma",
        "Medulloblastoma",
        "Diffuse Intrinsic Pontine Glioma",
        "Primary CNS Tumor"
      ],
      "interventions": [
        {
          "name": "Indoximod",
          "type": "DRUG"
        },
        {
          "name": "Temozolomide",
          "type": "DRUG"
        },
        {
          "name": "Conformal Radiation",
          "type": "RADIATION"
        },
        {
          "name": "Cyclophosphamide",
          "type": "DRUG"
        },
        {
          "name": "Etoposide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "RADIATION"
      ],
      "sponsor": "NewLink Genetics Corporation",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "3 Years to 21 Years"
      },
      "enrollment_count": 81,
      "start_date": "2015-10",
      "completion_date": "2020-02-28",
      "has_results": false,
      "last_update_posted_date": "2020-06-04",
      "last_synced_at": "2026-09-24T10:42:24.865Z",
      "location_count": 5,
      "location_summary": "Aurora, Colorado • Orlando, Florida • Atlanta, Georgia + 2 more",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Augusta",
          "state": "Georgia"
        },
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02502708"
    },
    {
      "nct_id": "NCT00000373",
      "title": "Treatment of Obsessive-Compulsive Disorder",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Obsessive-Compulsive Disorder"
      ],
      "interventions": [
        {
          "name": "olanzapine + fluoxetine",
          "type": "DRUG"
        },
        {
          "name": "placebo + fluoxetine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "14 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "14 Years to 70 Years"
      },
      "enrollment_count": 74,
      "start_date": "1992-09",
      "completion_date": "2003-07",
      "has_results": false,
      "last_update_posted_date": "2013-11-27",
      "last_synced_at": "2026-09-24T10:42:24.865Z",
      "location_count": 2,
      "location_summary": "Gainesville, Florida • Jacksonville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00000373"
    },
    {
      "nct_id": "NCT02922725",
      "title": "Placebo-controlled Trial of 5-hydroxytryptophan and Creatine for SSRI or SNRI Augmentation in Treatment Resistant Depression in Females",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Major Depressive Disorder"
      ],
      "interventions": [
        {
          "name": "5-hydroxytryptophan and Creatine",
          "type": "DRUG"
        },
        {
          "name": "Placebo control",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Brent Michael Kious, MD, PhD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "40 Years",
        "sex": "FEMALE",
        "summary": "25 Years to 40 Years · Female only"
      },
      "enrollment_count": 32,
      "start_date": "2016-11",
      "completion_date": "2020-05",
      "has_results": true,
      "last_update_posted_date": "2022-05-31",
      "last_synced_at": "2026-09-24T10:42:24.865Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02922725"
    },
    {
      "nct_id": "NCT07115563",
      "title": "Daily Amino Acid Supplementation for People With Parkinson's Disease",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Parkinson Disease (PD)"
      ],
      "interventions": [
        {
          "name": "Targeted Amino Acid Supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Control (placebo)",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Cristina Colon-Semenza",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "50 Years to 90 Years"
      },
      "enrollment_count": 30,
      "start_date": "2025-10-31",
      "completion_date": "2027-11",
      "has_results": false,
      "last_update_posted_date": "2026-08-13",
      "last_synced_at": "2026-09-24T10:42:24.865Z",
      "location_count": 2,
      "location_summary": "Farmington, Connecticut • Storrs, Connecticut",
      "locations": [
        {
          "city": "Farmington",
          "state": "Connecticut"
        },
        {
          "city": "Storrs",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07115563"
    },
    {
      "nct_id": "NCT07222306",
      "title": "Cannabis, Neuroinflammation, and Suicidal Ideation: A Supplemental Brain Imaging Study",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "PTSD",
        "Suicidal Thoughts and Behaviors",
        "PTSD Symptoms",
        "Depressive Symptoms"
      ],
      "interventions": [
        {
          "name": "1-(2-[+F]fluoroethyl)-L-tryptophan",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Wayne State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": "69 Years",
        "sex": "ALL",
        "summary": "19 Years to 69 Years"
      },
      "enrollment_count": 100,
      "start_date": "2026-01-01",
      "completion_date": "2030-08-31",
      "has_results": false,
      "last_update_posted_date": "2026-08-06",
      "last_synced_at": "2026-09-24T10:42:24.865Z",
      "location_count": 1,
      "location_summary": "Detroit, Michigan",
      "locations": [
        {
          "city": "Detroit",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07222306"
    },
    {
      "nct_id": "NCT00865202",
      "title": "A Placebo Controlled Trial Of L-Tryptophan In Post-Operative Delirium",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Post-operative Delirium"
      ],
      "interventions": [
        {
          "name": "L-tryptophan supplementation",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "60 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "60 Years and older"
      },
      "enrollment_count": 301,
      "start_date": "2008-12",
      "completion_date": "2012-12",
      "has_results": true,
      "last_update_posted_date": "2017-06-01",
      "last_synced_at": "2026-09-24T10:42:24.865Z",
      "location_count": 1,
      "location_summary": "Denver, Colorado",
      "locations": [
        {
          "city": "Denver",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00865202"
    },
    {
      "nct_id": "NCT03453489",
      "title": "AMT-PET in Monitoring Telotristat Etiprate Treatment in Participants With MetastaticNeuroendocrine Neoplasm",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Carcinoid Syndrome",
        "Metastatic Nonfunctional Well Differentiated Neuroendocrine Neoplasm"
      ],
      "interventions": [
        {
          "name": "Carbon C 11 Alpha-methyltryptophan",
          "type": "OTHER"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Positron Emission Tomography",
          "type": "PROCEDURE"
        },
        {
          "name": "Telotristat Etiprate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "OTHER",
        "PROCEDURE",
        "DRUG"
      ],
      "sponsor": "Barbara Ann Karmanos Cancer Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 4,
      "start_date": "2018-06-20",
      "completion_date": "2020-10-15",
      "has_results": true,
      "last_update_posted_date": "2025-04-10",
      "last_synced_at": "2026-09-24T10:42:24.865Z",
      "location_count": 1,
      "location_summary": "Detroit, Michigan",
      "locations": [
        {
          "city": "Detroit",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03453489"
    },
    {
      "nct_id": "NCT02367469",
      "title": "Tryptophan Metabolism in Human Brain Tumors",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Brain Tumors"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Wayne State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "13 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "13 Years and older"
      },
      "enrollment_count": 105,
      "start_date": "2014-02",
      "completion_date": "2021-12-31",
      "has_results": false,
      "last_update_posted_date": "2022-01-05",
      "last_synced_at": "2026-09-24T10:42:24.865Z",
      "location_count": 1,
      "location_summary": "Detroit, Michigan",
      "locations": [
        {
          "city": "Detroit",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02367469"
    },
    {
      "nct_id": "NCT00573300",
      "title": "Disturbances of Kynurenine Pathway of Trytophan Metabolism in Schizophrenia: A Quantitative Reverse Transcription Polymerase Chain Reaction (RT-PCR) Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Schizophrenia"
      ],
      "interventions": [
        {
          "name": "Phlebotomy",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "North Suffolk Mental Health Association",
      "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": 60,
      "start_date": "2006-01",
      "completion_date": "2009-05",
      "has_results": false,
      "last_update_posted_date": "2009-08-12",
      "last_synced_at": "2026-09-24T10:42:24.865Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00573300"
    }
  ]
}