Sodium Alginate

Indications and Usage

  • A derivative of kelp used in the manufacture of ice cream.
  • Oral alginates efficiently binds strontium in the gastrointestinal tract and prevent its absorption.
  • Alginate is a listed ingredient in Gaviscon®, ~200 mg per tablet or tablespoon. Do not exceed use as directed on label.
  • Suggested PO dosing (take with a full glass of water)
    • 5 g PO bid for 1 day, then 1 g PO QID

FDA Product Safety Info

  • Not FDA approved for this indication/off-label use
  • Practical use of sodium alginate may be limited by viscosity and limited commercial availability.

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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. 226) and Table 12.18 (p. 224). [Note: NCRP 161 supersedes NCRP 65.]