Renal

Phosphate Binders

Renal & Urinary

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Examples

sevelamercalcium acetatelanthanumferric citrate

Prefix / Suffix: No consistent suffix

Physiology

When kidneys cannot excrete phosphorus, phosphate rises and pulls calcium from bone, contributing to bone disease and vascular calcification.

Mechanism of Action

Phosphate binders attach to dietary phosphate in the GI tract so it is excreted in stool instead of absorbed into blood.

Indications

  • Hyperphosphatemia in chronic kidney disease
  • Dialysis-related mineral bone disorder
  • Phosphate control with renal diet

Side Effects / Adverse Effects

  • Constipation
  • Nausea or GI upset
  • Hypercalcemia with calcium-based binders
  • Dark stools with iron-based binders
  • Pill burden causing nonadherence

Contraindications

  • Bowel obstruction
  • Hypercalcemia with calcium-based binders
  • Iron overload with iron-based products
  • Product-specific allergy

Nursing Considerations

  • Give with meals or snacks because binders must meet dietary phosphate
  • Monitor phosphorus, calcium, PTH, and bowel pattern
  • Teach patient not to take binders away from food unless ordered
  • Separate from interacting medications as directed
  • Reinforce renal diet teaching

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Disclaimer: PharmPal Nurse is for education only and is not medical advice. Do not use it to diagnose, treat, prescribe, or make patient-care decisions; always verify with current drug references, your instructor, facility policy, and a licensed provider. In emergencies, call local emergency services.