{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=CP-690%2C550",
    "query": {
      "intervention": "CP-690,550"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 12,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=CP-690%2C550&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-06-07T07:14:41.722Z",
  "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": "NCT01262118",
      "title": "Effects Of CP-690,550 (Tasocitinib) On Cholesterol Metabolism In Patients With Active Rheumatoid Arthritis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Rheumatoid Arthritis"
      ],
      "interventions": [
        {
          "name": "CP-690,550 (tasocitinib)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 69,
      "start_date": "2011-05",
      "completion_date": "2012-02",
      "has_results": true,
      "last_update_posted_date": "2013-01-23",
      "last_synced_at": "2026-06-07T07:14:41.722Z",
      "location_count": 9,
      "location_summary": "Anniston, Alabama • Little Rock, Arkansas • Los Angeles, California + 5 more",
      "locations": [
        {
          "city": "Anniston",
          "state": "Alabama"
        },
        {
          "city": "Anniston",
          "state": "Alabama"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Daytona Beach",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01262118"
    },
    {
      "nct_id": "NCT01458574",
      "title": "A Study Of Oral CP-690,550 As A Maintenance Therapy For Ulcerative Colitis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Ulcerative Colitis"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "CP690,550",
          "type": "DRUG"
        },
        {
          "name": "CP-690,550",
          "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": 593,
      "start_date": "2012-07-20",
      "completion_date": "2016-05-27",
      "has_results": true,
      "last_update_posted_date": "2017-05-18",
      "last_synced_at": "2026-06-07T07:14:41.722Z",
      "location_count": 94,
      "location_summary": "Mobile, Alabama • La Jolla, California • Oceanside, California + 47 more",
      "locations": [
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Oceanside",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01458574"
    },
    {
      "nct_id": "NCT01204112",
      "title": "Estimate The Effect Of Repeat-Dose Rifampin On The Pharmacokinetics Of CP-690,550 In Healthy Volunteers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Tasocitinib (CP-690,550) plus Rifampin",
          "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": 12,
      "start_date": "2010-09",
      "completion_date": "2010-10",
      "has_results": false,
      "last_update_posted_date": "2010-10-22",
      "last_synced_at": "2026-06-07T07:14:41.722Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01204112"
    },
    {
      "nct_id": "NCT00263328",
      "title": "Extension Study Of Stage 1 Subjects Of Study A3921009 For The Prevention Of Acute Rejection In Kidney Transplant Patient",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Kidney Transplantation"
      ],
      "interventions": [
        {
          "name": "Tacrolimus",
          "type": "DRUG"
        },
        {
          "name": "CP-690,550",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 46,
      "start_date": "2005-12",
      "completion_date": "2014-06",
      "has_results": true,
      "last_update_posted_date": "2015-07-13",
      "last_synced_at": "2026-06-07T07:14:41.722Z",
      "location_count": 27,
      "location_summary": "Los Angeles, California • Palo Alto, California • San Diego, California + 10 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00263328"
    },
    {
      "nct_id": "NCT00550446",
      "title": "A Phase 2 Study For Patients With A Physician's Diagnosis Of Rheumatoid Arthritis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Arthritis, Rheumatoid"
      ],
      "interventions": [
        {
          "name": "Adalimumab",
          "type": "DRUG"
        },
        {
          "name": "CP-690,550",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "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": 386,
      "start_date": "2007-09",
      "completion_date": "2009-01",
      "has_results": true,
      "last_update_posted_date": "2013-01-03",
      "last_synced_at": "2026-06-07T07:14:41.722Z",
      "location_count": 22,
      "location_summary": "Mesa, Arizona • Little Rock, Arkansas • Northridge, California + 17 more",
      "locations": [
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Northridge",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "Stanford",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00550446"
    },
    {
      "nct_id": "NCT01740362",
      "title": "Pharmacokinetics Of CP-690,550 In Patients With Impaired Renal Function",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Renal Impairment"
      ],
      "interventions": [
        {
          "name": "CP-690,550",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 24,
      "start_date": "2003-10",
      "completion_date": "2004-03",
      "has_results": true,
      "last_update_posted_date": "2013-01-07",
      "last_synced_at": "2026-06-07T07:14:41.722Z",
      "location_count": 4,
      "location_summary": "Orlando, Florida • New Orleans, Louisiana • Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "New Orleans",
          "state": "Louisiana"
        },
        {
          "city": "New Orleans",
          "state": "Louisiana"
        },
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01740362"
    },
    {
      "nct_id": "NCT01059864",
      "title": "Study Of The Effects Of Atorvastatin On Cholesterol Levels In Rheumatoid Arthritis Patients Taking CP-690,550",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Rheumatoid Arthritis"
      ],
      "interventions": [
        {
          "name": "CP-690,550",
          "type": "DRUG"
        },
        {
          "name": "Atorvastatin",
          "type": "DRUG"
        },
        {
          "name": "Atorvastatin Placebo",
          "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": 111,
      "start_date": "2010-02",
      "completion_date": "2010-11",
      "has_results": true,
      "last_update_posted_date": "2012-12-13",
      "last_synced_at": "2026-06-07T07:14:41.722Z",
      "location_count": 10,
      "location_summary": "Birmingham, Alabama • Huntsville, Alabama • Gilbert, Arizona + 7 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Gilbert",
          "state": "Arizona"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Upland",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01059864"
    },
    {
      "nct_id": "NCT03000439",
      "title": "A Safety, Efficacy And Pharmacokinetics Study Of Tofacitinib In Pediatric Patients With sJIA",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Arthritis Juvenile Idiopathic"
      ],
      "interventions": [
        {
          "name": "In open-label phase: treatment with tofacitinib",
          "type": "DRUG"
        },
        {
          "name": "In double-blind phase: treatment with tofacitinib or placebo in 1:1 ratio",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "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": 100,
      "start_date": "2018-05-10",
      "completion_date": "2024-03-27",
      "has_results": true,
      "last_update_posted_date": "2025-06-03",
      "last_synced_at": "2026-06-07T07:14:41.722Z",
      "location_count": 5,
      "location_summary": "Phoenix, Arizona • Los Angeles, California • Chicago, Illinois + 2 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Lake Success",
          "state": "New York"
        },
        {
          "city": "New Hyde Park",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03000439"
    },
    {
      "nct_id": "NCT01458951",
      "title": "A Study To Evaluate Both The Efficacy and Safety Profile of CP-690,550 In Patients With Moderately to Severely Active Ulcerative Colitis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Ulcerative Colitis"
      ],
      "interventions": [
        {
          "name": "tofacitinib",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "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": 547,
      "start_date": "2012-06",
      "completion_date": "2015-06",
      "has_results": true,
      "last_update_posted_date": "2016-06-01",
      "last_synced_at": "2026-06-07T07:14:41.722Z",
      "location_count": 62,
      "location_summary": "Tucson, Arizona • Oceanside, California • San Diego, California + 33 more",
      "locations": [
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Oceanside",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01458951"
    },
    {
      "nct_id": "NCT01465763",
      "title": "A Study Evaluating The Efficacy And Safety Of CP-690,550 In Patients With Moderate To Severe Ulcerative Colitis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Ulcerative Colitis"
      ],
      "interventions": [
        {
          "name": "tofacitinib",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "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": 614,
      "start_date": "2012-04",
      "completion_date": "2015-05",
      "has_results": true,
      "last_update_posted_date": "2016-06-07",
      "last_synced_at": "2026-06-07T07:14:41.722Z",
      "location_count": 71,
      "location_summary": "Mobile, Alabama • La Jolla, California • Los Angeles, California + 29 more",
      "locations": [
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "La Jolla",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01465763"
    }
  ]
}