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Clinical trialNCT01554982CompletedPhase 3Interventional

A Long-Term Safety Extension Trial of Ferric Citrate in Patients With End-Stage Renal Disease (ESRD) on Dialysis

SponsorKeryx BiopharmaceuticalsEnrollment168ESRDEnd Stage Renal DiseaseHyperphosphatemiaKidney FailureRenal Failure
View the registry record on ClinicalTrials.gov

Summary

The lay summary the sponsor registered on ClinicalTrials.gov.

A long-term safety study of ferric citrate (KRX-0502) in renal failure patients who have completed study KRX-0502-304. Only patients who participated in the KRX-0502-304 trial may participate in this trial.

Investigators

The overall officials registered on this study. Names that resolve to a findmyKOL profile link to it; the rest are shown as registered.

A profile link is shown only when the registered name resolves to a person record with a confident, namesake-checked match; ambiguous names stay unlinked.

Sites

34 registered facilities, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.

Puerto Rico
  • Rcmi-Clinical Research Center

    Rio Piedras, PR, Puerto Rico

United States
  • Veterans Administration Greater Los Angeles Health Care System

    Los Angeles, California, United States

  • University of Colorado

    Aurora, Colorado, United States

  • Western Nephrology and Metabolic Bone Disease, Pc

    Westminster, Colorado, United States

  • Kidney Care Associates, Llc

    Augusta, Georgia, United States

  • Circle Medical Management

    Chicago, Illinois, United States

  • Davita Dialysis Unit 494/nephrology Specialists, Pc

    Michigan City, Indiana, United States

  • Dept of Internal Medicine, Nephrology & Hypertension

    New Orleans, Louisiana, United States

  • Washington Nephrology Associates

    Bethesda, Maryland, United States

  • Tufts Medical Center

    Boston, Massachusetts, United States

  • Western New England Renal & Transplant Associates, Pc

    Springfield, Massachusetts, United States

  • Nephrology Hypertension Clinic, Pc

    Dearborn, Michigan, United States

  • Henry Ford Hospital

    Detroit, Michigan, United States

  • Rochester Hills Davita Dialysis

    Pontiac, Michigan, United States

  • Asheville Kidney Center

    Asheville, North Carolina, United States

  • Metrolina Nephrology Associates, Pa

    Charlotte, North Carolina, United States

  • Duke University Dept of Medicine/nephrology

    Durham, North Carolina, United States

  • Piedmont Dialysis Center

    Winston-Salem, North Carolina, United States

  • Clinical Research Limited

    Canton, Ohio, United States

  • University of Cincinnati

    Cincinnati, Ohio, United States

  • University of Pennsylvania Health System

    Philadelphia, Pennsylvania, United States

  • Southeast Renal Research Institute Nephrology Associates

    Chattanooga, Tennessee, United States

  • Nephrology Associates, Pc

    Nashville, Tennessee, United States

  • Vanderbilt University Medical Center

    Nashville, Tennessee, United States

  • Ut Southwestern Medical Center at Dallas

    Dallas, Texas, United States

  • Kidney Associates, Pllc

    Houston, Texas, United States

  • Kidney Specialists of North Houston, Pllc

    Houston, Texas, United States

  • Med Center Dialysis

    Houston, Texas, United States

  • University of Vermont/ Fletcher Allen Health Care: Renal Services

    Burlington, Vermont, United States

  • Nephrology Clinical Research Center

    Charlottesville, Virginia, United States

  • Clinical Research & Consulting Center, Llc

    Fairfax, Virginia, United States

  • Nephrology Associates of Northern Virginia, Inc.

    Fairfax, Virginia, United States

  • Butler Farms Dialysis

    Hampton, Virginia, United States

  • Medical College of Wisconsin

    Milwaukee, Wisconsin, United States

Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.

Drugs studied

The drug and biological interventions registered on this study, normalized to their RxNorm ingredient where possible.

Linked drugs open the directory filtered to KOLs working with them.clinicaltrials.gov ↗

Registration & key dates

Registry attributes as recorded on the ClinicalTrials.gov study record.

Start
31 Aug 2012
Primary completion
30 Jun 2014
Completion
31 Aug 2014
Last update posted
13 Jul 2016
Registered enrollment
168
Registry id
NCT01554982

Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 24 Aug 2026. Registry facts are shown as registered by the study sponsor; findmyKOL does not interpret them.