About vitamin k
Vitamin K; fat-soluble vitamin
Used for
- Prevents or treats bleeding caused by vitamin K deficiency.
- Reverses certain blood-thinning medicine effects, such as warfarin, when medically indicated.
- Helps prevent bleeding in newborns.
Usual adult dose
Dose and route depend on the cause and urgency; clinicians select the dose and monitor blood clotting.
Usual dose in children
For newborn bleeding prevention, a clinician typically gives one intramuscular dose at birth; treatment doses depend on the cause and age.
Common side effects
- Injection-site pain, swelling, or redness.
- Flushing, dizziness, or altered taste.
- Rare severe allergic reactions, especially with intravenous use.
Important warnings
- Intravenous injection can cause severe reactions and is generally given slowly when necessary.
- Incorrect use can interfere with anticoagulant treatment or increase clotting risk.
- The exact preparation and route matter; follow product-specific clinical guidance.
Pregnancy
Use only when clinically needed; safety depends on the indication, route, and dose.
Breastfeeding
Generally compatible when medically indicated; information is limited for some uses.
Interactions
- Warfarin and related anticoagulants: vitamin K can reduce their effect.
- Some antibiotics may increase vitamin K requirements.
- Bile-acid sequestrants and mineral oil may reduce vitamin K absorption.
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 It may be incomplete or out of date.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.