What is Phytonadione: Uses, Warnings & Interactions

Updated May 14, 2025  •  Published Dec 30, 2020

Phytonadione overview

BRAND NAMES:

  • Phytonadione, K1-1000, Mephyton

Generic Names:

  • Phytonadione

Uses:

  • Prevents bleeding problems by helping blood clot better.

Therapeutic Classes:

  • Antidote, Nutriceutical, Nutritive Agent

Forms:

  • Capsule, Tablet

How it’s taken:

  • By mouth

What is Phytonadione used for?

What form(s) does Phytonadione come in

  • Capsule

  • Tablet

What are common Phytonadione doses?

  • Tablet 5MG

  • Syringe 0.5ML of 1MG/0.5ML

  • Ampule 1ML of 10MG/ML

  • Bottle 1GM of

  • Bottle 5GM of

  • Bottle 25GM of

  • Bottle 5ML of

  • Bottle 25ML of

Common Phytonadione prescriptions

  • Phytonadione
    1ml of 10mg/ml ampule

  • Phytonadione
    5mg tablet blister

  • Phytonadione
    5mg, 100 tablets bottle

  • Phytonadione
    5mg, 30 tablets bottle

  • Phytonadione
    5mg, 20 tablets box

  • Phytonadione
    5mg, 20 tablets carton

  • Phytonadione
    0.5ml of 1mg/0.5ml syringe

  • Phytonadione
    5mg tablet

  • Phytonadione
    0.5ml of 1mg/0.5ml vial

  • Phytonadione
    1ml of 10mg/ml vial

How to take Phytonadione

  • Your doctor will tell you how much medicine to use. Do not use more than directed.

  • Missed dose: Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.

  • Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.

  • Your doctor will tell you how much medicine to use. Do not use more than directed.

  • Missed dose: Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.

  • Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.

What to do if you miss a dose of Phytonadione

Phytonadione contraindications

  • This medicine is not right for everyone. Do not use this medicine if you had an allergic reaction to phytonadione or vitamin K.

Phytonadione warnings

  • Tell your doctor if you are pregnant or breastfeeding, or if you have liver disease or had problems with blot clotting too much, such as a stroke or an embolism.

  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

Phytonadione interactions

  • Some medicines and foods can affect how this medicine works. Tell your doctor if you are also using a blood thinner such as warfarin.

  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

Phytonadione side effects

Serious Side Effects

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

  • Chest pain, sudden headache, trouble breathing, or pain in your leg

  • Lightheadedness, dizziness, or fainting

Less Serious Side Effects

  • Warmth or redness in your face, neck, arms, or upper chest

  • Change in sense of taste

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