Table of Contents

MAGNESIUM PRODUCTS AND DOSING

Salt Form Strength Elemental Mg++
Magnesium glucoheptonate
(Magnesium RougierŪ)
liquid 100mg/mL 5mg/mL
(0.4mEq/mL, 0.2mMol/mL)
Magnesium  complex tablet 50mg
100mg
50mg (4mEq,2mMol)
100mg (8mEq, 4mMol)
Magnesium  sulphate injection (10mL) 500mg/mL 50mg/mL
(4mEq/mL, 2mMol/mL)

Treatment of Hypomagnesemia:

Parenteral (Magnesium Sulphate)

Mild deficiency:

1-2g (8-16mEq, 4-8mMol) IV, IM every 6-12 hours as necessary for repletion. If IV, dilute 1-2 g in 50-100mL NS or D5W and administer over 30-60 minutes.

Severe deficiency:

5-6g magnesium sulphate (40-48mEq, 20-24mMol) in 50-250mL NS or D5W IV over 3-4 hours. Repeat every 12-24 hours x 3-4 doses until serum magnesium levels have returned to normal.  

Oral Replacement

Mild deficiency:

  • 25-35mEq Mg++/day

  • Magnesium RougierŪ  60-90cc/day in 3-4 divided doses

  • Magnesium complex 300-400mg/day in 2-3divided divided doses