{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=PF-06651600+Placebo",
    "query": {
      "intervention": "PF-06651600 Placebo"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-23T14:00:26.593Z",
  "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": "NCT07228390",
      "title": "A 16-Week Study to Learn About the Study Medicine Called Ritlecitinib in Adults With Long Lasting Painful Red Skin Lumps, Known by the Medical Term, Hidradenitis Suppurativa, or HS.",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hidradenitis Suppurativa"
      ],
      "interventions": [
        {
          "name": "Ritlecitinib",
          "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": 128,
      "start_date": "2025-11-13",
      "completion_date": "2027-01-05",
      "has_results": false,
      "last_update_posted_date": "2026-09-01",
      "last_synced_at": "2026-09-23T14:00:26.593Z",
      "location_count": 35,
      "location_summary": "Phoenix, Arizona • Scottsdale, Arizona • Hot Springs, Arkansas + 25 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Hot Springs",
          "state": "Arkansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07228390"
    },
    {
      "nct_id": "NCT03395184",
      "title": "Study To Evaluate The Efficacy And Safety Of Oral PF-06651600 And PF-06700841 In Subjects With Moderate To Severe Crohn's Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Crohn's Disease"
      ],
      "interventions": [
        {
          "name": "PF-06651600 Placebo",
          "type": "DRUG"
        },
        {
          "name": "PF-06651600",
          "type": "DRUG"
        },
        {
          "name": "Placebo PF-06700841",
          "type": "DRUG"
        },
        {
          "name": "PF-06700841",
          "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": 244,
      "start_date": "2018-02-02",
      "completion_date": "2023-10-19",
      "has_results": true,
      "last_update_posted_date": "2024-10-30",
      "last_synced_at": "2026-09-23T14:00:26.593Z",
      "location_count": 57,
      "location_summary": "Dothan, Alabama • Beverly Hills, California • Los Angeles, California + 25 more",
      "locations": [
        {
          "city": "Dothan",
          "state": "Alabama"
        },
        {
          "city": "Dothan",
          "state": "Alabama"
        },
        {
          "city": "Beverly Hills",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03395184"
    },
    {
      "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": "2026-09-23T14:00:26.593Z",
      "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": "NCT06873945",
      "title": "A Study of 2 Doses of Ritlecitinib in People 12 Years of Age and Older With Alopecia Areata",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Alopecia Areata"
      ],
      "interventions": [
        {
          "name": "Ritlecitinib 100 mg",
          "type": "DRUG"
        },
        {
          "name": "Ritlecitinib 50 mg",
          "type": "DRUG"
        },
        {
          "name": "Placebo - 100 mg",
          "type": "DRUG"
        },
        {
          "name": "Placebo - 50 mg",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "12 Years and older"
      },
      "enrollment_count": 674,
      "start_date": "2025-04-01",
      "completion_date": "2028-03-19",
      "has_results": false,
      "last_update_posted_date": "2026-09-18",
      "last_synced_at": "2026-09-23T14:00:26.593Z",
      "location_count": 60,
      "location_summary": "Birmingham, Alabama • Hot Springs, Arkansas • Brea, California + 39 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Hot Springs",
          "state": "Arkansas"
        },
        {
          "city": "Brea",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06873945"
    },
    {
      "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": "2026-09-23T14:00:26.593Z",
      "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": "NCT03732807",
      "title": "PF-06651600 for the Treatment of Alopecia Areata",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Alopecia Areata"
      ],
      "interventions": [
        {
          "name": "PF-06651600 Induction Dose",
          "type": "DRUG"
        },
        {
          "name": "PF-06651600 Maintenance Dose #1",
          "type": "DRUG"
        },
        {
          "name": "PF-06651600 Maintenance Dose #2",
          "type": "DRUG"
        },
        {
          "name": "PF-06651600 Maintenance Dose #3",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "12 Years and older"
      },
      "enrollment_count": 718,
      "start_date": "2018-12-03",
      "completion_date": "2021-06-24",
      "has_results": true,
      "last_update_posted_date": "2022-02-24",
      "last_synced_at": "2026-09-23T14:00:26.593Z",
      "location_count": 46,
      "location_summary": "Birmingham, Alabama • Beverly Hills, California • Irvine, California + 25 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Beverly Hills",
          "state": "California"
        },
        {
          "city": "Irvine",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03732807"
    },
    {
      "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": "2026-09-23T14:00:26.593Z",
      "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": "NCT07219615",
      "title": "A Study to Learn About Ritlecitinib for the Potential Treatment of Chronic Spontaneous Urticaria in Adults.",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Chronic Spontaneous Urticaria"
      ],
      "interventions": [
        {
          "name": "Ritlecitinib 50 mg",
          "type": "DRUG"
        },
        {
          "name": "Ritlecitinib 100 mg",
          "type": "DRUG"
        },
        {
          "name": "Placebo - 50 mg",
          "type": "DRUG"
        },
        {
          "name": "Placebo - 100 mg",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 200,
      "start_date": "2025-10-30",
      "completion_date": "2027-04-23",
      "has_results": false,
      "last_update_posted_date": "2026-06-17",
      "last_synced_at": "2026-09-23T14:00:26.593Z",
      "location_count": 15,
      "location_summary": "Phoenix, Arizona • Little Rock, Arkansas • Bakersfield, California + 12 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Bakersfield",
          "state": "California"
        },
        {
          "city": "Fountain Valley",
          "state": "California"
        },
        {
          "city": "Lancaster",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07219615"
    },
    {
      "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": "2026-09-23T14:00:26.593Z",
      "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": "NCT04517864",
      "title": "PLACEBO-CONTROLLED SAFETY STUDY OF RITLECITINIB (PF-06651600) IN ADULTS WITH ALOPECIA AREATA",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Alopecia Areata"
      ],
      "interventions": [
        {
          "name": "PF-06651600",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 71,
      "start_date": "2020-09-15",
      "completion_date": "2024-05-07",
      "has_results": true,
      "last_update_posted_date": "2025-07-11",
      "last_synced_at": "2026-09-23T14:00:26.593Z",
      "location_count": 23,
      "location_summary": "Huntington Beach, California • Irvine, California • Boca Raton, Florida + 17 more",
      "locations": [
        {
          "city": "Huntington Beach",
          "state": "California"
        },
        {
          "city": "Irvine",
          "state": "California"
        },
        {
          "city": "Boca Raton",
          "state": "Florida"
        },
        {
          "city": "Hollywood",
          "state": "Florida"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04517864"
    }
  ]
}