{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?sponsor=Vifor+Pharma",
    "query": {
      "sponsor": "Vifor Pharma"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 23,
    "total_pages": 3,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?sponsor=Vifor+Pharma&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-30T22:01:30.023Z",
  "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": "NCT01452906",
      "title": "A Drug-Drug Interaction Study of Omeprazole and PA21",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "PA21 and Omeprazole with food",
          "type": "DRUG"
        },
        {
          "name": "No PA21; Omeprazole with food",
          "type": "DRUG"
        },
        {
          "name": "PA21 with food, Omeprazole 2hrs later",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Vifor Pharma",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "20 Years to 50 Years"
      },
      "enrollment_count": 45,
      "start_date": "2011-09",
      "completion_date": "2011-12",
      "has_results": false,
      "last_update_posted_date": "2011-12-12",
      "last_synced_at": "2026-09-30T22:01:30.023Z",
      "location_count": 1,
      "location_summary": "Anaheim, California",
      "locations": [
        {
          "city": "Anaheim",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01452906"
    },
    {
      "nct_id": "NCT01464190",
      "title": "A Phase 3 Extension Study to Investigate the Long-term Safety, Tolerability and Efficacy of PA21, a Phosphate Binder in Dialysis Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Chronic Kidney Disease Requiring Chronic Dialysis"
      ],
      "interventions": [
        {
          "name": "PA21 (2.5 g tablet containing 500 mg iron)",
          "type": "DRUG"
        },
        {
          "name": "Sevelamer carbonate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Vifor Pharma",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 659,
      "start_date": "2011-09",
      "completion_date": "2013-04",
      "has_results": true,
      "last_update_posted_date": "2014-04-01",
      "last_synced_at": "2026-09-30T22:01:30.023Z",
      "location_count": 1,
      "location_summary": "San Antonio, Texas",
      "locations": [
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01464190"
    },
    {
      "nct_id": "NCT05766839",
      "title": "Effect of Patiromer in Children Under 12 Years of Age With High Blood Potassium Levels",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hyperkalemia"
      ],
      "interventions": [
        {
          "name": "Patiromer",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Vifor Pharma, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "0 Years",
        "maximum_age": "11 Years",
        "sex": "ALL",
        "summary": "0 Years to 11 Years"
      },
      "enrollment_count": 36,
      "start_date": "2025-04-06",
      "completion_date": "2030-12-01",
      "has_results": false,
      "last_update_posted_date": "2026-09-25",
      "last_synced_at": "2026-09-30T22:01:30.023Z",
      "location_count": 13,
      "location_summary": "Aurora, Colorado • Jacksonville, Florida • Miami, Florida + 10 more",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Augusta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05766839"
    },
    {
      "nct_id": "NCT04817670",
      "title": "Study to Assess Efficacy and Safety of VIT-2763 (Vamifeport) in Subjects With Sickle Cell Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Sickle Cell Disease"
      ],
      "interventions": [
        {
          "name": "VIT-2763 120 mg",
          "type": "DRUG"
        },
        {
          "name": "VIT-2763 360 mg",
          "type": "DRUG"
        },
        {
          "name": "VIT-2763 240 mg",
          "type": "DRUG"
        },
        {
          "name": "Placebo BID",
          "type": "DRUG"
        },
        {
          "name": "Placebo TID",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Vifor (International) Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 25,
      "start_date": "2021-11-18",
      "completion_date": "2024-03-07",
      "has_results": true,
      "last_update_posted_date": "2025-02-18",
      "last_synced_at": "2026-09-30T22:01:30.023Z",
      "location_count": 8,
      "location_summary": "Birmingham, Alabama • Los Angeles, California • Aurora, Colorado + 5 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Hollywood",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04817670"
    },
    {
      "nct_id": "NCT04938635",
      "title": "Efficacy and Safety Study of Multiple Doses of VIT-2763 in Adults With Transfusion-dependent Beta-thalassemia",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Beta-Thalassemia"
      ],
      "interventions": [
        {
          "name": "VIT-2763 60 mg QD",
          "type": "DRUG"
        },
        {
          "name": "VIT-2763 60 mg BID",
          "type": "DRUG"
        },
        {
          "name": "VIT-2763 120 mg BID",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Vifor (International) Inc.",
      "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": 0,
      "start_date": "2021-09-20",
      "completion_date": "2023-07",
      "has_results": false,
      "last_update_posted_date": "2022-11-10",
      "last_synced_at": "2026-09-30T22:01:30.023Z",
      "location_count": 1,
      "location_summary": "Whittier, California",
      "locations": [
        {
          "city": "Whittier",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04938635"
    },
    {
      "nct_id": "NCT01810939",
      "title": "A Two-Part, Single-Blind, Phase 3 Study Evaluating the Efficacy and Safety of Patiromer for the Treatment of Hyperkalemia (OPAL)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Chronic Kidney Disease (CKD)",
        "Hyperkalemia (HK)"
      ],
      "interventions": [
        {
          "name": "Patiromer",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Relypsa, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 243,
      "start_date": "2013-02",
      "completion_date": "2013-08",
      "has_results": true,
      "last_update_posted_date": "2021-06-03",
      "last_synced_at": "2026-09-30T22:01:30.023Z",
      "location_count": 14,
      "location_summary": "Azusa, California • Los Angeles, California • Sacramento, California + 11 more",
      "locations": [
        {
          "city": "Azusa",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Santa Barbara",
          "state": "California"
        },
        {
          "city": "Ventura",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01810939"
    },
    {
      "nct_id": "NCT04864795",
      "title": "Cardiovascular and Renal Treatment in Heart Failure Patients With Hyperkalaemia or at High Risk of Hyperkalaemia",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Heart Failure",
        "Hyperkalemia"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Vifor (International) Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2636,
      "start_date": "2021-04-19",
      "completion_date": "2024-08-30",
      "has_results": false,
      "last_update_posted_date": "2024-11-04",
      "last_synced_at": "2026-09-30T22:01:30.023Z",
      "location_count": 52,
      "location_summary": "Little Rock, Arkansas • La Jolla, California • Northridge, California + 46 more",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Northridge",
          "state": "California"
        },
        {
          "city": "Bridgeport",
          "state": "Connecticut"
        },
        {
          "city": "Boynton Beach",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04864795"
    },
    {
      "nct_id": "NCT04903717",
      "title": "Pragmatic Trial Of Alerts for Use of Mineralocorticoid Receptor Antagonists",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Failure With Reduced Ejection Fraction"
      ],
      "interventions": [
        {
          "name": "Best Practice Alert",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Yale University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1210,
      "start_date": "2021-11-03",
      "completion_date": "2024-02-06",
      "has_results": false,
      "last_update_posted_date": "2024-08-23",
      "last_synced_at": "2026-09-30T22:01:30.023Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04903717"
    },
    {
      "nct_id": "NCT03781089",
      "title": "Patiromer Efficacy to Reduce Episodic Hyperkalemia in End Stage Renal Disease Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hyperkalemia",
        "End Stage Renal Disease"
      ],
      "interventions": [
        {
          "name": "Patiromer Oral Powder Product",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 36,
      "start_date": "2019-06-20",
      "completion_date": "2023-03-15",
      "has_results": true,
      "last_update_posted_date": "2025-05-30",
      "last_synced_at": "2026-09-30T22:01:30.023Z",
      "location_count": 1,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03781089"
    },
    {
      "nct_id": "NCT02694744",
      "title": "Patiromer With or Without Food for the Treatment of Hyperkalemia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Hyperkalemia"
      ],
      "interventions": [
        {
          "name": "patiromer",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Relypsa, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 114,
      "start_date": "2016-02",
      "completion_date": "2016-08",
      "has_results": true,
      "last_update_posted_date": "2021-05-12",
      "last_synced_at": "2026-09-30T22:01:30.023Z",
      "location_count": 29,
      "location_summary": "Fountain Valley, California • Huntington Beach, California • Palm Springs, California + 21 more",
      "locations": [
        {
          "city": "Fountain Valley",
          "state": "California"
        },
        {
          "city": "Huntington Beach",
          "state": "California"
        },
        {
          "city": "Palm Springs",
          "state": "California"
        },
        {
          "city": "Riverside",
          "state": "California"
        },
        {
          "city": "San Dimas",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02694744"
    }
  ]
}