Potassium Phosphate, Dibasic

Indications, Contraindications, and Usage

  • Oral potassium phosphate, dibasic can be used to block uptake of radioactive phosphorus (P-32).
  • The medication K-Phos® Neutral contains 250 mg phosphorus per tablet.
  • Contraindicated in hyperphosphatemia, renal insufficiency, and infected phosphate stones.
  • Suggested PO dosing (take with a full glass of water at meals and at bedtime)
    • Adults: 250-500 mg (1-2 tabs) PO qid
    • Children >4 years old: 250 mg (1 tab) PO qid

FDA Product Safety Info

  • Not FDA approved for this indication/off-label use

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  1. Management of Persons Contaminated with Radionuclides: Handbook (NCRP Report No. 161, Vol. I), National Council on Radiation Protection and Measurements, Bethesda, MD, 2008, Medical Treatments Arranged by Radionuclide (p. 221). [Note: NCRP 161 supersedes NCRP 65.]