{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Diphenhydramine+citrate",
    "query": {
      "intervention": "Diphenhydramine citrate"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 251,
    "total_pages": 26,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Diphenhydramine+citrate&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-26T02:46:19.698Z",
  "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": "NCT06801626",
      "title": "Novel Strategies for Reducing Burn Scar Itch",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Burn Scar",
        "Itch Scarring",
        "Wound"
      ],
      "interventions": [
        {
          "name": "Famotidine and 4% topical cromolyn sodium",
          "type": "COMBINATION_PRODUCT"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "COMBINATION_PRODUCT",
        "OTHER"
      ],
      "sponsor": "The University of Texas Medical Branch, Galveston",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 44,
      "start_date": "2025-03-01",
      "completion_date": "2027-11-01",
      "has_results": false,
      "last_update_posted_date": "2025-09-24",
      "last_synced_at": "2026-09-26T02:46:19.698Z",
      "location_count": 1,
      "location_summary": "Galveston, Texas",
      "locations": [
        {
          "city": "Galveston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06801626"
    },
    {
      "nct_id": "NCT00076752",
      "title": "Lymphocyte Depletion and Stem Cell Transplantation to Treat Severe Systemic Lupus Erythematosus",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Lupus Erythematosus, Systemic"
      ],
      "interventions": [
        {
          "name": "fludarabine phosphate",
          "type": "DRUG"
        },
        {
          "name": "cyclophosphamide",
          "type": "DRUG"
        },
        {
          "name": "Rituxan (rituximab)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "filgrastim",
          "type": "BIOLOGICAL"
        },
        {
          "name": "methylprednisolone",
          "type": "DRUG"
        },
        {
          "name": "immunologic technique",
          "type": "OTHER"
        },
        {
          "name": "laboratory biomarker analysis",
          "type": "OTHER"
        },
        {
          "name": "autologous hematopoietic stem cell transplantation",
          "type": "PROCEDURE"
        },
        {
          "name": "Diphenhydramine",
          "type": "DRUG"
        },
        {
          "name": "Mesna",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BIOLOGICAL",
        "OTHER",
        "PROCEDURE"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "15 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "15 Years to 40 Years"
      },
      "enrollment_count": 9,
      "start_date": "2004-01-30",
      "completion_date": "2013-10-15",
      "has_results": true,
      "last_update_posted_date": "2021-01-05",
      "last_synced_at": "2026-09-26T02:46:19.698Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00076752"
    },
    {
      "nct_id": "NCT04544436",
      "title": "A Study to Evaluate the Efficacy, Safety and Pharmacokinetics (PK) of a Higher Dose of Ocrelizumab in Adults With Relapsing Multiple Sclerosis (RMS)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Multiple Sclerosis"
      ],
      "interventions": [
        {
          "name": "Ocrelizumab",
          "type": "DRUG"
        },
        {
          "name": "Antihistamine",
          "type": "DRUG"
        },
        {
          "name": "Methylprednisolone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Hoffmann-La Roche",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "18 Years to 55 Years"
      },
      "enrollment_count": 864,
      "start_date": "2020-11-26",
      "completion_date": "2028-08-31",
      "has_results": true,
      "last_update_posted_date": "2026-07-30",
      "last_synced_at": "2026-09-26T02:46:19.698Z",
      "location_count": 25,
      "location_summary": "Cullman, Alabama • Homewood, Alabama • Phoenix, Arizona + 22 more",
      "locations": [
        {
          "city": "Cullman",
          "state": "Alabama"
        },
        {
          "city": "Homewood",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Carlsbad",
          "state": "California"
        },
        {
          "city": "Stanford",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04544436"
    },
    {
      "nct_id": "NCT00899847",
      "title": "Phase 2 Study of Autologous Followed by Nonmyeloablative Allogeneic Transplantation Using TLI & ATG",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Transplantation, Homologous",
        "Transplantation, Autologous",
        "Multiple Myeloma",
        "Blood and Marrow Transplant (BMT)"
      ],
      "interventions": [
        {
          "name": "Autologous peripheral blood stem cells (auto-PBSC) transplantation",
          "type": "PROCEDURE"
        },
        {
          "name": "Allogeneic peripheral blood stem cells (allo-PBSC) transplantation",
          "type": "PROCEDURE"
        },
        {
          "name": "Filgrastim",
          "type": "DRUG"
        },
        {
          "name": "Cyclophosphamide",
          "type": "DRUG"
        },
        {
          "name": "Melphalan",
          "type": "DRUG"
        },
        {
          "name": "Cyclosporine",
          "type": "DRUG"
        },
        {
          "name": "Total lymphoid irradiation",
          "type": "RADIATION"
        },
        {
          "name": "Rabbit anti-thymocyte globulin",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Mycophenolate Mofetil 250mg",
          "type": "DRUG"
        },
        {
          "name": "Solumedrol",
          "type": "DRUG"
        },
        {
          "name": "Diphenhydramine",
          "type": "DRUG"
        },
        {
          "name": "Acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "Hydrocortisone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DRUG",
        "RADIATION",
        "BIOLOGICAL"
      ],
      "sponsor": "Stanford University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 9,
      "start_date": "2009-05",
      "completion_date": "2014-12",
      "has_results": true,
      "last_update_posted_date": "2017-10-20",
      "last_synced_at": "2026-09-26T02:46:19.698Z",
      "location_count": 1,
      "location_summary": "Stanford, California",
      "locations": [
        {
          "city": "Stanford",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00899847"
    },
    {
      "nct_id": "NCT02356159",
      "title": "Study of Palifermin (Kepivance) in Persons Undergoing Unrelated Donor Allogeneic Hematopoietic Cell Transplantation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Myelodysplastic Syndromes",
        "Hodgkin's Lymphoma",
        "Non-Hodgkin's Lymphoma",
        "Acute Leukemia",
        "Multiple Myeloma"
      ],
      "interventions": [
        {
          "name": "Rituximab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Conditioning chemotherapy",
          "type": "DRUG"
        },
        {
          "name": "TMS",
          "type": "DRUG"
        },
        {
          "name": "FLAG",
          "type": "DRUG"
        },
        {
          "name": "EPOCH-F",
          "type": "DRUG"
        },
        {
          "name": "Hematopoietic stem cell transplant",
          "type": "PROCEDURE"
        },
        {
          "name": "Palifermin",
          "type": "DRUG"
        },
        {
          "name": "Acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "Diphenhydramine",
          "type": "DRUG"
        },
        {
          "name": "Prednisone",
          "type": "DRUG"
        },
        {
          "name": "Epinephrine",
          "type": "DRUG"
        },
        {
          "name": "IV Saline",
          "type": "OTHER"
        },
        {
          "name": "ECG",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "ECHO",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "MUGA",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "DEXA",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "CT chest",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "PET",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "MRI",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "BM aspirate",
          "type": "PROCEDURE"
        },
        {
          "name": "BM biopsy",
          "type": "PROCEDURE"
        },
        {
          "name": "Lumbar puncture",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DRUG",
        "PROCEDURE",
        "OTHER",
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 34,
      "start_date": "2015-09-24",
      "completion_date": "2025-03-25",
      "has_results": true,
      "last_update_posted_date": "2025-09-30",
      "last_synced_at": "2026-09-26T02:46:19.698Z",
      "location_count": 2,
      "location_summary": "Bethesda, Maryland • Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        },
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02356159"
    },
    {
      "nct_id": "NCT02295280",
      "title": "A Cost Effective Treatment for Headache in Pregnancy When Acetaminophen Alone is Ineffective.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Headache"
      ],
      "interventions": [
        {
          "name": "Metoclopramide",
          "type": "DRUG"
        },
        {
          "name": "Diphenhydramine",
          "type": "DRUG"
        },
        {
          "name": "Codeine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "St. Louis University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "50 Years",
        "sex": "FEMALE",
        "summary": "16 Years to 50 Years · Female only"
      },
      "enrollment_count": 70,
      "start_date": "2012-01",
      "completion_date": "2014-11",
      "has_results": true,
      "last_update_posted_date": "2018-04-02",
      "last_synced_at": "2026-09-26T02:46:19.698Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02295280"
    },
    {
      "nct_id": "NCT03913559",
      "title": "Inotuzumab Ozogamicin for Children With MRD Positive CD22+ Lymphoblastic Leukemia",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Acute Lymphoblastic Leukemia"
      ],
      "interventions": [
        {
          "name": "Inotuzumab ozogamicin",
          "type": "DRUG"
        },
        {
          "name": "Methotrexate",
          "type": "DRUG"
        },
        {
          "name": "Hydrocortisone",
          "type": "DRUG"
        },
        {
          "name": "Cytarabine",
          "type": "DRUG"
        },
        {
          "name": "Diphenhydramine",
          "type": "DRUG"
        },
        {
          "name": "Acetaminophen",
          "type": "DRUG"
        },
        {
          "name": "Methylprednisolone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "St. Jude Children's Research Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "Up to 21 Years"
      },
      "enrollment_count": 5,
      "start_date": "2019-05-14",
      "completion_date": "2025-09-15",
      "has_results": false,
      "last_update_posted_date": "2026-02-12",
      "last_synced_at": "2026-09-26T02:46:19.698Z",
      "location_count": 2,
      "location_summary": "San Diego, California • Memphis, Tennessee",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Memphis",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03913559"
    },
    {
      "nct_id": "NCT02452528",
      "title": "Study of ARC-520 in Participants With Hepatitis B Virus e Antigen (HBeAg) Positive Chronic Hepatitis B Virus",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Chronic Hepatitis B"
      ],
      "interventions": [
        {
          "name": "ARC-520",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Entecavir",
          "type": "DRUG"
        },
        {
          "name": "Tenofovir",
          "type": "DRUG"
        },
        {
          "name": "diphenhydramine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Arrowhead Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 4,
      "start_date": "2015-08",
      "completion_date": "2016-12",
      "has_results": true,
      "last_update_posted_date": "2025-11-03",
      "last_synced_at": "2026-09-26T02:46:19.698Z",
      "location_count": 4,
      "location_summary": "San Francisco, California • Miami, Florida • New York, New York + 1 more",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02452528"
    },
    {
      "nct_id": "NCT00762749",
      "title": "Study to Evaluate Diphenhydramine in Children and Adolescents",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Allergic Rhinitis"
      ],
      "interventions": [
        {
          "name": "diphenhydramine HCl",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Johnson & Johnson Consumer and Personal Products Worldwide",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "2 Years to 17 Years"
      },
      "enrollment_count": 36,
      "start_date": "2008-09",
      "completion_date": "2008-11",
      "has_results": false,
      "last_update_posted_date": "2011-10-06",
      "last_synced_at": "2026-09-26T02:46:19.698Z",
      "location_count": 1,
      "location_summary": "Little Rock, Arkansas",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00762749"
    },
    {
      "nct_id": "NCT00590590",
      "title": "Safety and Efficacy of Two Vaginal Products Versus Placebo in Patients With Vaginal Discomfort",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Vulvodynia"
      ],
      "interventions": [
        {
          "name": "Lidocaine/Diphenhydramine",
          "type": "DRUG"
        },
        {
          "name": "lidocaine",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Lumara Health, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 50 Years · Female only"
      },
      "enrollment_count": 105,
      "start_date": "2007-10",
      "completion_date": "2009-07",
      "has_results": true,
      "last_update_posted_date": "2012-03-02",
      "last_synced_at": "2026-09-26T02:46:19.698Z",
      "location_count": 41,
      "location_summary": "Montgomery, Alabama • Chandler, Arizona • Phoenix, Arizona + 36 more",
      "locations": [
        {
          "city": "Montgomery",
          "state": "Alabama"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Searcy",
          "state": "Arkansas"
        },
        {
          "city": "Dinuba",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00590590"
    }
  ]
}