Adult Total dose: Not to exceed 30-40 g daily.
Mild hypomagnesaemia 1 g IM every 6 hr for 4 doses.
Severe hypomagnesaemia 0.25 g/kg IM over 4 hr or 5 g slow IV infusion over 3 hr.
TPN 0.5-3 g daily.
Pregnancy toxemia Initially 4 g IV, followed by 4-5 g IM into each buttock or 1-2 g/hr infusion. May be followed by 4-5 g into alternate buttock every 4 hr.
Infant TPN 0.25-1.25 g daily.