Vitamin K (phytomenadione) — paediatric dose
Weight-based dosing for Vitamin K (phytomenadione) in children. Category: Other.
| Dose | 0.3 mg/kg (neonate 1 mg IM at birth) |
|---|---|
| Per kg | 0.3 mg/kg |
| Maximum | 10 mg |
| Route | IV/IM |
Clinical notes
Reversal of warfarin / VKDB.
Common questions
What is the dose of Vitamin K (phytomenadione) in children?
0.3 mg/kg (neonate 1 mg IM at birth). That is 0.3 mg/kg per dose.
What is the maximum Vitamin K (phytomenadione) dose for a child?
The maximum single dose is 10 mg. Weight-based calculation should never exceed this ceiling.
How is Vitamin K (phytomenadione) given?
Vitamin K (phytomenadione) is given by IV/IM.
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.