{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=PF-06651600",
    "query": {
      "intervention": "PF-06651600"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 27,
    "total_pages": 3,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=PF-06651600&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-03T12:53:18.506Z",
  "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": "NCT02974868",
      "title": "Study To Evaluate The Efficacy And Safety Profile Of PF-06651600 And PF-06700841 In Subjects With Alopecia Areata",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Alopecia Areata"
      ],
      "interventions": [
        {
          "name": "PF-06651600",
          "type": "DRUG"
        },
        {
          "name": "PF-06700841",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "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": 142,
      "start_date": "2016-12-15",
      "completion_date": "2019-05-15",
      "has_results": true,
      "last_update_posted_date": "2020-05-26",
      "last_synced_at": "2026-09-03T12:53:18.506Z",
      "location_count": 39,
      "location_summary": "Birmingham, Alabama • Santa Ana, California • Santa Monica, California + 15 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Santa Ana",
          "state": "California"
        },
        {
          "city": "Santa Monica",
          "state": "California"
        },
        {
          "city": "Santa Monica",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02974868"
    },
    {
      "nct_id": "NCT04355845",
      "title": "A STUDY TO EVALUATE THE EFFECT OF PF-06651600 ON PHARMACOKINETICS OF SINGLE DOSE SUMATRIPTAN IN HEALTHY PARTICIPANTS.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy Volunteers"
      ],
      "interventions": [
        {
          "name": "Sumatriptan",
          "type": "DRUG"
        },
        {
          "name": "PF-06651600",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "18 Years to 55 Years"
      },
      "enrollment_count": 10,
      "start_date": "2020-06-15",
      "completion_date": "2020-08-10",
      "has_results": false,
      "last_update_posted_date": "2020-09-03",
      "last_synced_at": "2026-09-03T12:53:18.506Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04355845"
    },
    {
      "nct_id": "NCT05128058",
      "title": "A Target Occupancy Study With Ritlecitinib.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Ritlecitinib 50 mg",
          "type": "DRUG"
        },
        {
          "name": "Ritlecitinib 200 mg",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 16,
      "start_date": "2021-10-22",
      "completion_date": "2022-01-14",
      "has_results": true,
      "last_update_posted_date": "2023-11-13",
      "last_synced_at": "2026-09-03T12:53:18.506Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05128058"
    },
    {
      "nct_id": "NCT02969044",
      "title": "Study To Assess The Efficacy And Safety Of Pf-06651600 In Subjects With Rheumatoid Arthritis With An Inadequate Response To Methotrexate",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Rheumatoid Arthritis"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "PF-06651600",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "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": 70,
      "start_date": "2016-12-20",
      "completion_date": "2017-12-12",
      "has_results": true,
      "last_update_posted_date": "2018-12-04",
      "last_synced_at": "2026-09-03T12:53:18.506Z",
      "location_count": 4,
      "location_summary": "Northridge, California • St Louis, Missouri • Duncansville, Pennsylvania + 1 more",
      "locations": [
        {
          "city": "Northridge",
          "state": "California"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "Duncansville",
          "state": "Pennsylvania"
        },
        {
          "city": "Mesquite",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02969044"
    },
    {
      "nct_id": "NCT05549934",
      "title": "Ritlecitinib for Cicatricial Alopecia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Cicatricial Alopecia"
      ],
      "interventions": [
        {
          "name": "PF-06651600",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Emma Guttman",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 50,
      "start_date": "2022-12-15",
      "completion_date": "2025-03-20",
      "has_results": true,
      "last_update_posted_date": "2026-07-15",
      "last_synced_at": "2026-09-03T12:53:18.506Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05549934"
    },
    {
      "nct_id": "NCT02958865",
      "title": "Study to Compare Oral PF-06651600, PF-06700841 and Placebo in Subjects With Moderate to Severe Ulcerative Colitis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Ulcerative Colitis"
      ],
      "interventions": [
        {
          "name": "PF-06651600 or Placebo",
          "type": "DRUG"
        },
        {
          "name": "PF-06700841 or Placebo",
          "type": "DRUG"
        },
        {
          "name": "PF-06700841",
          "type": "DRUG"
        },
        {
          "name": "PF-06651600",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "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": 319,
      "start_date": "2017-02-03",
      "completion_date": "2021-05-10",
      "has_results": true,
      "last_update_posted_date": "2022-07-21",
      "last_synced_at": "2026-09-03T12:53:18.506Z",
      "location_count": 60,
      "location_summary": "Dothan, Alabama • Long Beach, California • Los Angeles, California + 26 more",
      "locations": [
        {
          "city": "Dothan",
          "state": "Alabama"
        },
        {
          "city": "Dothan",
          "state": "Alabama"
        },
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02958865"
    },
    {
      "nct_id": "NCT05879458",
      "title": "Ritlecitinib in CTCL",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "CTCL",
        "Mycosis Fungoides",
        "Sezary Syndrome"
      ],
      "interventions": [
        {
          "name": "Ritlecitinib",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Icahn School of Medicine at Mount Sinai",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 7,
      "start_date": "2023-05-17",
      "completion_date": "2025-06-25",
      "has_results": false,
      "last_update_posted_date": "2025-07-18",
      "last_synced_at": "2026-09-03T12:53:18.506Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05879458"
    },
    {
      "nct_id": "NCT03715829",
      "title": "A Phase 2b Study To Evaluate The Efficacy And Safety Profile Of PF-06651600 And PF-06700841 In Active Non-segmental Vitiligo Subjects",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Active Non-segmental Vitiligo"
      ],
      "interventions": [
        {
          "name": "PF-06651600",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        },
        {
          "name": "PF06700841",
          "type": "DRUG"
        },
        {
          "name": "narrow-band UVB phototherapy",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DEVICE"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 366,
      "start_date": "2018-11-26",
      "completion_date": "2021-02-05",
      "has_results": true,
      "last_update_posted_date": "2022-03-25",
      "last_synced_at": "2026-09-03T12:53:18.506Z",
      "location_count": 40,
      "location_summary": "Huntington Beach, California • Irvine, California • Los Angeles, California + 25 more",
      "locations": [
        {
          "city": "Huntington Beach",
          "state": "California"
        },
        {
          "city": "Irvine",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Murrieta",
          "state": "California"
        },
        {
          "city": "Oceanside",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03715829"
    },
    {
      "nct_id": "NCT04390776",
      "title": "Bioequivalence Study of PF-06651600 Capsules Relative to Tablets and Estimation of Food Effect on Capsules.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy Participants"
      ],
      "interventions": [
        {
          "name": "PF-06651600",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "18 Years to 55 Years"
      },
      "enrollment_count": 164,
      "start_date": "2020-09-28",
      "completion_date": "2021-07-19",
      "has_results": false,
      "last_update_posted_date": "2021-08-04",
      "last_synced_at": "2026-09-03T12:53:18.506Z",
      "location_count": 2,
      "location_summary": "Hollywood, Florida • Saint Paul, Minnesota",
      "locations": [
        {
          "city": "Hollywood",
          "state": "Florida"
        },
        {
          "city": "Saint Paul",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04390776"
    },
    {
      "nct_id": "NCT04037865",
      "title": "A Renal Impairment Study for PF-06651600",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Renal Impairment"
      ],
      "interventions": [
        {
          "name": "PF-06651600",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 8,
      "start_date": "2019-08-19",
      "completion_date": "2020-03-31",
      "has_results": true,
      "last_update_posted_date": "2021-05-18",
      "last_synced_at": "2026-09-03T12:53:18.506Z",
      "location_count": 3,
      "location_summary": "Miami, Florida • Saint Paul, Minnesota",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Saint Paul",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04037865"
    }
  ]
}