Phytonadione
Mephyton is a brand name for phytonadione, a synthetic form of vitamin K1. It is used to treat or prevent bleeding in patients with vitamin K deficiency or to reverse excessive anticoagulation caused by warfarin. This medication helps restore the body's ability to form blood clots normally.
Mephyton is vitamin K1 used to treat bleeding disorders and reverse anticoagulant effects.
Key facts at a glance
- RxNorm
- 218324
- Generic
- Mephyton
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Treats hypoprothrombinemia due to vitamin K deficiency, reverses warfarin anticoagulation, and addresses bleeding associated with certain medications or liver disease.
Provides vitamin K1, which is essential for the synthesis of clotting factors II, VII, IX, and X, enabling the blood to clot properly.
May cause allergic reactions when given by injection; effectiveness depends on liver function; close monitoring of clotting parameters is recommended during treatment. Administered orally or by injection depending on clinical situation.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed July 26, 2026. · Read our editorial policy