Mephyton

DRUG DESCRIPTION

Phytonadione is a vitamin which is a clear, yellow to amber, viscous, and nearly odorless liquid. It is insoluble in water, soluble in chloroform and slightly soluble in ethanol. It has a molecular weight of 450.70.

Phytonadione is 2-methyl-3-phytyl-1, 4-naphthoquinone. Its empirical formula is C31H46O2 and its structural formula is:

MEPHYTON® 
  (Phytonadione) Structural Formula Illustration

MEPHYTON* (Phytonadione) tablets containing 5 mg of phytonadione are yellow, compressed tablets, scored on one side. Inactive ingredients are acacia, calcium phosphate, colloidal silicon dioxide, lactose, magnesium stearate, starch, and talc.

What are the possible side effects of phytonadione (Mephyton, Vitamin K1)?

Seek emergency medical attention or contact your doctor immediately if you experience any serious side effects from phytonadione such as:

  • an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives);
  • dizziness;
  • fast or irregular heartbeats; or
  • increased sweating.

Other less serious side effects may be more likely to occur. Continue to use phytonadione and talk to your doctor if you experience

    ...

Read All Potential Side Effects and See Pictures of Mephyton »

What are the precautions when taking phytonadione (Mephyton)?

Before taking vitamin K, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: blood disorders, gallbladder disease (e.g., obstructive jaundice, biliary fistula), liver disease.

During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.

It is not known whether this medication passes into breast milk. Consult your doctor before...

Read All Potential Precautions of Mephyton »


Mephyton Consumer (continued)

SIDE EFFECTS: Vitamin K usually has very few side effects. If you have any unusual effects from taking this medicine, tell your doctor or pharmacist promptly.

If your doctor has prescribed this medication, remember that he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, tell your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

PRECAUTIONS: Before taking vitamin K, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: blood disorders, gallbladder disease (e.g., obstructive jaundice, biliary fistula), liver disease.

During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.

It is not known whether this medication passes into breast milk. Consult your doctor before breast-feeding.


Mephyton Patient Information Including Side Effects

Brand Names: Mephyton, Vitamin K1

Generic Name: phytonadione (Pronunciation: fye toe na DYE own)

  • What is phytonadione (Mephyton)?
  • What are the possible side effects of phytonadione (Mephyton)?
  • What is the most important information I should know about phytonadione (Mephyton)?
  • What should I discuss with my healthcare provider before taking phytonadione (Mephyton)?
  • How should I take phytonadione (Mephyton)?
  • What happens if I miss a dose (Mephyton)?
  • What happens if I overdose (Mephyton)?
  • What should I avoid while taking phytonadione (Mephyton)?
  • What other drugs will affect phytonadione (Mephyton)?
  • Where can I get more information?

What is phytonadione (Mephyton)?

Phytonadione is a man-made form of vitamin K. Phytonadione is important in the production of substances that cause the blood to clot.

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

Phytonadione may also be used for purposes other than those listed in this medication guide.

What are the possible side effects of phytonadione (Mephyton)?

Seek emergency medical attention or contact your doctor immediately if you experience any serious side effects from phytonadione such as:

  • an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives);
  • dizziness;
  • fast or irregular heartbeats; or
  • increased sweating.

Other less serious side effects may be more likely to occur. Continue to use phytonadione and talk to your doctor if you experience

  • flushing of the face;
  • an unusual taste in the mouth; or
  • pain or irritation at the injection site (injectable form).

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. You may report side effects to FDA at 1-800-FDA-1088.

What is the most important information I should know about phytonadione (Mephyton)?

Tell your doctor and dentist that you are taking phytonadione before having any type of surgery.

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