Table of Contents

PHOSPHATE PRODUCTS AND DOSING

Salt Form Strength Elemental P04- Other
Phosphates solution liquid 500mg/4mL 500mg
(16 mMol per 4mL)
4mL is equivalent to 1x500mg tab Phosphate Sandoz®
Potassium phosphate injection   3 mMol/mL 4.4 mMol/mL potassium
Sodium phosphate injection   3 mMol/mL 4.0 mMol/mL sodium

Treatment of Hypophosphatemia: 

Parenteral (use ideal body weight)

Recent and uncomplicated hypophosphatemia:

0.08-0.16mMol P04- /kg IV (5-10mMol phosphate).

Symptomatic hypophosphatemia:

0.16-0.24 mMol P04-/kg IV (10-20mMol phosphate). Higher doses up to 0.5mMol P04-/kg have been used for serum P04- <0.16mMol/L

Additional doses should be guided by serum levels.  Check serum phosphate levels daily until stabililized.  Also check serum potassium and calcium levels.

Administration:

Concentration: Potassium phosphate 15mMol P04-/250mL NS or D5W
(higher concentrations must be run centrally)
Sodium phosphate dilute dose in minimum 100mL NS or D5W
Maximum rate: Potassium phosphate  over 4-6 hours
Sodium phosphate < or = to 15mMol P04- over 2 hours
> 15mMol PO4- over 4-6 hour

Oral Replacement:

Mild hypophosphatemia:

Phosphates solution 500mg (16 mMol, 4mL) 2 to 4 times daily.