Ferric Citrate and Chronic Kidney Disease in Children

Inclusion criteria

• Ages 6 to 18 years (inclusive);
• Estimated Glomerular Filtration Rate (GFR) of 15-59 ml/min per 1.73 m2 by modified Chronic Kidney disease in Children (CKiD) under 25 (U25) formula;56
• Serum phosphate \<=5.9 mg/dl;
• Serum ferritin \<500 ng/ml and TSAT \<50%;
• For those patients treated with growth hormone, calcitriol, nutritional vitamin D, iron, and/or erythropoiesis-stimulating agents (ESAs) such treatments must have stable dosing for at least 2 weeks prior to screening;
• Able to swallow tablets;
• Able to eat at least two meals a day;
• In the opinion of the investigator, willing and able to follow the study treatment regimen and comply with the site investigator's recommendations.

Exclusion criteria

• Patients currently treated with phosphate binders.
• History of allergy to all ingredients (including non-medical ingredients) in both products (i.e. investigational product and placebo)
• Current intestinal malabsorption, documented in the medical record; disease, inflammatory bowel syndrome, and/or Crohn's Disease.
• Anticipated initiation of dialysis or kidney transplantation within 6 months
• Current or planned future systemic immunosuppressive therapy
• Prior solid organ transplantation
• Receipt of bone marrow transplant within two years of screening
• Current pregnancy, lactation or female subjects who have reached menarche, unless using highly-effective contraception as outlined in section 7.1.1 of Protocol
• Patients participating in other interventional study (observational study participation permitted)
• Poor adherence to medical treatments in the opinion of the investigator
• Cystinosis
• Fanconi syndrome
• Hemochromatosis or laboratory tests indicating possible hemochromatosis or other iron overload (primary or secondary) syndrome