Phytonadione is a man-made form of vitamin K, which occurs naturally in the body.

Phytonadione is used to treat vitamin K deficiency and to treat certain bleeding or blood clotting problems.

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  • Mephyton, Vitamin K, Aquamephyton, Konakion, Vitamin K1
  • Less common - With menadiol or high doses of phytonadione in newborns
    Decreased appetite
    decreased movement or activity
    difficulty in breathing
    enlarged liver
    general body swelling
    irritability
    muscle stiffness
    paleness
    yellow eyes or skin
    Rare - With injection only
    Difficulty in swallowing
    fast or irregular breathing
    lightheadedness or fainting
    shortness of breath
    skin rash, hives and/or itching
    swelling of eyelids, face, or lips
    tightness in chest
    troubled breathing and/or wheezing
    Rare
    Blue color or flushing or redness of skin
    dizziness
    fast and/or weak heartbeat
    increased sweating
    low blood pressure (temporary)
    Some phytonadione side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

    Less common
    Flushing of face
    redness, pain, or swelling at place of injection
    skin lesions at place of injection (rare)
    unusual taste
  • (injectable solution, oral tablet, compounding powder)