Magnesium sulfate — paediatric dose
Weight-based dosing for Magnesium sulfate in children. Category: Resuscitation.
| Dose | 25–50 mg/kg (max 2 g) |
|---|---|
| Per kg | 25–50 mg/kg |
| Maximum | 2000 mg |
| Route | IV |
| Frequency | over 20 min |
Clinical notes
Torsades, severe asthma, hypomagnesaemia.
Common questions
What is the dose of Magnesium sulfate in children?
25–50 mg/kg (max 2 g). That is 25–50 mg/kg per dose.
What is the maximum Magnesium sulfate dose for a child?
The maximum single dose is 2000 mg. Weight-based calculation should never exceed this ceiling.
How is Magnesium sulfate given?
Magnesium sulfate is given by IV, over 20 min.
About this page
Compiled from standard paediatric references. Verify against a current formulary and your local protocol.
Spotted something wrong? Report an error on this page — corrections from clinicians are welcome and are reviewed before any change is published.
Last reviewed 2026-08-12.