A 4-Week Dose-Ranging and Efficacy Trial of KRX-0502 (Ferric Citrate) in Patients With End-Stage Renal Disease

Completed · Phase 3

Conditions studied: Hyperphosphatemia, End-Stage Renal Disease

In brief

This is a research study for people with high blood phosphorus levels who are on dialysis. This medical condition can cause weakening of the bones and damage other organs. This can lead to many health problems, and sometimes death. Phosphorus is in much of the food we eat, and is helpful to us in small amounts. Patients with kidney failure have trouble getting rid of the phosphorus eaten in food. Dialysis can help remove some of the phosphorus, but often patients must take a phosphate binder like PhosLo®, Renagel®, or Renvela® to bring the blood phosphorus levels back to normal. The purpose of this study is to see if KRX-0502 (ferric citrate) is safe and effective as a phosphate binder.

Key facts

Study ID

NCT01074125

Run by

Keryx Biopharmaceuticals

People needed

154

Starts

2010-05-01

Expected to finish

2010-11-01

Last updated by the study team

2014-12-04

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Males or non-pregnant, non-lactating females
• Age > 18 years
• On thrice weekly hemodialysis or peritoneal dialysis for at least the previous three months prior to Screening Visit (Visit 0)
• Serum phosphorus levels ≥ 3.5 mg/dL and < 8.0 mg/dL at Screening Visit (Visit 0)
• Serum phosphorus levels > 6.0 mg/dL during the washout period (Visits 2 or 3)
• Taking 3 to 15 tablets/capsules per day of 667mg calcium acetate or 800 mg sevelamer (hydrochloride or carbonate), or any combination of these agents as reported by the patient at Screening Visit (Visit 0)
• Serum ferritin <1000micrograms/L and Transferrin Saturation (TSAT) <50% at the Screening Visit (Visit 0)
• Willingness to be discontinued from current phosphate binder(s) and initiated on KRX-0502 (ferric citrate)
• Willing and able to give informed consent
• Willing and able to stay on a constant dose of Vitamin D (or its analogs) and Sensipar (cinacalcet) for the treatment period, if applicable.

You may not qualify if…

• Parathyroidectomy within six months prior to Screening Visit (Visit 0)
• Actively symptomatic gastrointestinal bleeding or inflammatory bowel disease
• Serum phosphorus levels >10.0 mg/dL documented in all of the three monthly laboratories (done routinely in the dialysis unit) in the three months prior to the Screening Visit (Visit 0)
• History of multiple drug allergies or intolerances
• History of malignancy in the last five years (treated cervical or non-melanomatous skin cancer may be permitted if approved by CCC)
• Previous intolerance to oral ferric citrate
• Absolute requirement for oral iron therapy
• Absolute requirement for Vitamin C (multivitamins [Nephrocaps, Renaphro, etc.] allowed)
• Absolute requirement for calcium-, magnesium-, or aluminum-containing drugs with meals
• Psychiatric disorder that interferes with the patient's ability to comply with the study protocol
• Inability to tolerate oral drug intake
• Planned surgery or hospitalization during the trial (scheduled outpatient access surgery allowed)
• Any other medical condition that renders the patient unable to or unlikely to complete the trial or that would interfere with optimal participation in the trial or produce significant risk to the patient
• Receipt of any investigational drug within 30 days of Screening Visit (Visit 0)
• Inability to cooperate with study personnel or history of noncompliance
• Unsuitable for this trial per Principal Investigator's clinical judgment

Where it is running

• Western Nephrology — Westminster, Colorado, United States
• Pines Clinical Research, Inc. — Pembroke Pines, Florida, United States
• Kidney Care Associates, LLC — Augusta, Georgia, United States
• Circle Medical Management — Chicago, Illinois, United States
• Western New England Renal & Transplant Associates — Springfield, Massachusetts, United States
• Brookdale Physician's Dialysis Associates — Brooklyn, New York, United States
• DCI — Cincinnati, Ohio, United States
• Cleveland Clinical Foundation Fresenius East (Fairhill) — Cleveland, Ohio, United States
• The Ohio State University Cramblett Medical Clinic — Columbus, Ohio, United States
• Southeast Renal Research Institute — Chattanooga, Tennessee, United States
• Nephrology Associates, PC — Nashville, Tennessee, United States
• Meharry Medical College Clinical Research Center — Nashville, Tennessee, United States
• Vanderbilt University Medical Center Clinical Trials Center — Nashville, Tennessee, United States
• Kidney Associates — Houston, Texas, United States
• Centre Point Dialysis — West Allis, Wisconsin, United States
• RCMI- Clinical Research Center Medical Sciences Campus University of Puerto Rico — Rio Piedras, PR, Puerto Rico

Full record on ClinicalTrials.gov

Trial information comes from ClinicalTrials.gov and is refreshed daily. TrialsForMe does not provide medical care and does not run the studies it lists.