About phytomenadione
Vitamin K1 (fat-soluble vitamin)
Used for
- Treats or prevents vitamin K deficiency and related bleeding.
- Reverses warfarin effects in selected cases.
- Prevents vitamin K deficiency bleeding in newborns.
Usual adult dose
Varies by reason and route; commonly 1–10 mg for warfarin reversal, guided by clotting tests.
Usual dose in children
Newborn prevention: usually 1 mg by injection once. Treatment doses depend on age and cause.
Common side effects
- Injection-site pain or swelling
- Flushing, dizziness, or altered taste
- Rare severe allergic reaction, especially with injection
Important warnings
- Intravenous use can cause serious allergic reactions; administration requires medical supervision.
- May not rapidly stop severe bleeding; additional treatment may be needed.
- Use and dose depend on the cause of bleeding and clotting-test results.
- Avoid accidental overdose, particularly in newborns.
Pregnancy
Use only when clinically necessary; safety depends on the situation and route.
Breastfeeding
Generally compatible when medically needed; discuss treatment with a healthcare professional.
Interactions
- Warfarin and other vitamin K antagonists: reduces their anticoagulant effect.
- Some antibiotics and other medicines can alter vitamin K status or response.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.