{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Erythrocyte+Stimulating+Agent+%28ESA%29",
    "query": {
      "intervention": "Erythrocyte Stimulating Agent (ESA)"
    },
    "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=Erythrocyte+Stimulating+Agent+%28ESA%29&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-27T22:46:43.153Z",
  "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": "NCT07422480",
      "title": "A Study to Compare Elritercept With Epoetin Alfa to Treat Anemia in Adults With Very Low, Low, or Intermediate Risk Myelodysplastic Syndromes (MDS) Who Need Regular Blood Transfusions",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Myelodysplastic Syndrome",
        "Anemia"
      ],
      "interventions": [
        {
          "name": "Elritercept",
          "type": "DRUG"
        },
        {
          "name": "Epoetin Alfa",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Takeda",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 300,
      "start_date": "2026-05-21",
      "completion_date": "2033-10-01",
      "has_results": false,
      "last_update_posted_date": "2026-09-18",
      "last_synced_at": "2026-09-27T22:46:43.153Z",
      "location_count": 31,
      "location_summary": "Gilbert, Arizona • Duarte, California • Santa Rosa, California + 26 more",
      "locations": [
        {
          "city": "Gilbert",
          "state": "Arizona"
        },
        {
          "city": "Duarte",
          "state": "California"
        },
        {
          "city": "Santa Rosa",
          "state": "California"
        },
        {
          "city": "Whittier",
          "state": "California"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07422480"
    },
    {
      "nct_id": "NCT00228449",
      "title": "Peginesatide for Anemia in Chronic Hemodialysis Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Anemia",
        "Chronic Kidney Disease",
        "Chronic Renal Failure"
      ],
      "interventions": [
        {
          "name": "peginesatide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Affymax",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 165,
      "start_date": "2005-07",
      "completion_date": "2007-05",
      "has_results": false,
      "last_update_posted_date": "2012-12-21",
      "last_synced_at": "2026-09-27T22:46:43.153Z",
      "location_count": 14,
      "location_summary": "Birmingham, Alabama • Pine Bluff, Arkansas • Los Angeles, California + 11 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Pine Bluff",
          "state": "Arkansas"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Mountain View",
          "state": "California"
        },
        {
          "city": "Lauderdale Lakes",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00228449"
    },
    {
      "nct_id": "NCT00598442",
      "title": "Safety and Efficacy of Peginesatide for the Treatment of Anemia in Participants With Chronic Renal Failure Not on Dialysis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Chronic Renal Failure",
        "Chronic Kidney Disease",
        "Anemia"
      ],
      "interventions": [
        {
          "name": "peginesatide",
          "type": "DRUG"
        },
        {
          "name": "Darbepoetin alfa",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Affymax",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 493,
      "start_date": "2007-11",
      "completion_date": "2009-12",
      "has_results": true,
      "last_update_posted_date": "2013-02-12",
      "last_synced_at": "2026-09-27T22:46:43.153Z",
      "location_count": 42,
      "location_summary": "Phoenix, Arizona • Fayetteville, Arkansas • Fountain Valley, California + 38 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Fayetteville",
          "state": "Arkansas"
        },
        {
          "city": "Fountain Valley",
          "state": "California"
        },
        {
          "city": "Fullerton",
          "state": "California"
        },
        {
          "city": "Granada Hills",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00598442"
    },
    {
      "nct_id": "NCT01478971",
      "title": "Conversion Study From Epoetin Alfa to Monthly Peginesatide Injection in Patients With Chronic Kidney Disease on Dialysis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Chronic Kidney Disease",
        "Anemia"
      ],
      "interventions": [
        {
          "name": "Epoetin",
          "type": "DRUG"
        },
        {
          "name": "Peginesatide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Takeda",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 184,
      "start_date": "2011-10",
      "completion_date": "2013-02",
      "has_results": true,
      "last_update_posted_date": "2016-09-20",
      "last_synced_at": "2026-09-27T22:46:43.153Z",
      "location_count": 5,
      "location_summary": "Sacramento, California • San Diego, California • San Jose, California + 2 more",
      "locations": [
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "San Jose",
          "state": "California"
        },
        {
          "city": "North Brunswick",
          "state": "New Jersey"
        },
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01478971"
    },
    {
      "nct_id": "NCT00372489",
      "title": "Extension Study to Evaluate Safety and Tolerability of Peginesatide for Long-Term Treatment of Anemia in Participants With CKD",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Chronic Renal Failure",
        "Chronic Kidney Disease",
        "Anemia"
      ],
      "interventions": [
        {
          "name": "peginesatide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Affymax",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 81,
      "start_date": "2006-09",
      "completion_date": "2009-11",
      "has_results": true,
      "last_update_posted_date": "2012-06-29",
      "last_synced_at": "2026-09-27T22:46:43.153Z",
      "location_count": 9,
      "location_summary": "Pine Bluff, Arkansas • Mountain View, California • Lauderdale Lakes, Florida + 6 more",
      "locations": [
        {
          "city": "Pine Bluff",
          "state": "Arkansas"
        },
        {
          "city": "Mountain View",
          "state": "California"
        },
        {
          "city": "Lauderdale Lakes",
          "state": "Florida"
        },
        {
          "city": "Pembroke Pines",
          "state": "Florida"
        },
        {
          "city": "Shreveport",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00372489"
    },
    {
      "nct_id": "NCT00597584",
      "title": "Safety & Efficacy of Peginesatide for Maintenance Treatment of Anemia in Participants With Chronic Kidney Disease on Hemodialysis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Chronic Renal Failure",
        "Chronic Kidney Disease",
        "Anemia"
      ],
      "interventions": [
        {
          "name": "peginesatide",
          "type": "DRUG"
        },
        {
          "name": "Epoetin alfa or Epoetin beta",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Affymax",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 823,
      "start_date": "2007-10",
      "completion_date": "2010-01",
      "has_results": true,
      "last_update_posted_date": "2013-03-08",
      "last_synced_at": "2026-09-27T22:46:43.153Z",
      "location_count": 39,
      "location_summary": "Phoenix, Arizona • Hot Springs, Arkansas • McGehee, Arkansas + 33 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Hot Springs",
          "state": "Arkansas"
        },
        {
          "city": "McGehee",
          "state": "Arkansas"
        },
        {
          "city": "Pine Bluff",
          "state": "Arkansas"
        },
        {
          "city": "Bakersfield",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00597584"
    },
    {
      "nct_id": "NCT05451940",
      "title": "Hydroxyurea and EPO in Sickle Cell Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Anemia, Sickle Cell",
        "Sickle Cell Disease"
      ],
      "interventions": [
        {
          "name": "Hydroxyurea",
          "type": "DRUG"
        },
        {
          "name": "Epoetin Alfa-BioSimilar",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Julia Xu",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 17,
      "start_date": "2023-05-25",
      "completion_date": "2025-02-27",
      "has_results": true,
      "last_update_posted_date": "2026-01-07",
      "last_synced_at": "2026-09-27T22:46:43.153Z",
      "location_count": 1,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05451940"
    },
    {
      "nct_id": "NCT02189889",
      "title": "Active Preoperative Anemia Management in Patients Undergoing Cardiac Surgery",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Anemia",
        "Cardiovascular Disease"
      ],
      "interventions": [
        {
          "name": "EPO",
          "type": "DRUG"
        },
        {
          "name": "Feraheme",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Texas Southwestern Medical Center",
      "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": 5,
      "start_date": "2013-04-09",
      "completion_date": "2019-07-26",
      "has_results": true,
      "last_update_posted_date": "2020-10-23",
      "last_synced_at": "2026-09-27T22:46:43.153Z",
      "location_count": 2,
      "location_summary": "Dallas, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        },
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02189889"
    },
    {
      "nct_id": "NCT01286012",
      "title": "Continuous Soluble Ferric Pyrophosphate (SFP) Iron Delivery Via Dialysate in Hemodialysis Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "End Stage Renal Disease"
      ],
      "interventions": [
        {
          "name": "Soluble Ferric Pyrophosphate in liquid bicarbonate",
          "type": "DRUG"
        },
        {
          "name": "Placebo: Conventional liquid bicarbonate",
          "type": "DRUG"
        },
        {
          "name": "Erythrocyte Stimulating Agent (ESA)",
          "type": "DRUG"
        },
        {
          "name": "Intravenous (IV) Iron",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Rockwell Medical Technologies, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 108,
      "start_date": "2011-01",
      "completion_date": "2013-01",
      "has_results": true,
      "last_update_posted_date": "2018-10-01",
      "last_synced_at": "2026-09-27T22:46:43.153Z",
      "location_count": 22,
      "location_summary": "Birmingham, Alabama • Tempe, Arizona • Granada Hills, California + 17 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Tempe",
          "state": "Arizona"
        },
        {
          "city": "Granada Hills",
          "state": "California"
        },
        {
          "city": "Colorado Springs",
          "state": "Colorado"
        },
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01286012"
    },
    {
      "nct_id": "NCT00598273",
      "title": "Safety & Efficacy of Peginesatide for the Treatment of Anemia in Participants With Chronic Renal Failure Not on Dialysis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Chronic Renal Failure",
        "Chronic Kidney Disease",
        "Anemia"
      ],
      "interventions": [
        {
          "name": "peginesatide",
          "type": "DRUG"
        },
        {
          "name": "Darbepoetin alfa",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Affymax",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 490,
      "start_date": "2007-10",
      "completion_date": "2010-02",
      "has_results": true,
      "last_update_posted_date": "2013-02-12",
      "last_synced_at": "2026-09-27T22:46:43.153Z",
      "location_count": 68,
      "location_summary": "Montgomery, Alabama • Tempe, Arizona • Hot Springs, Arkansas + 62 more",
      "locations": [
        {
          "city": "Montgomery",
          "state": "Alabama"
        },
        {
          "city": "Tempe",
          "state": "Arizona"
        },
        {
          "city": "Hot Springs",
          "state": "Arkansas"
        },
        {
          "city": "Bakersfield",
          "state": "California"
        },
        {
          "city": "Chula Vista",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00598273"
    }
  ]
}