Mephyton

Phytonadione (vitamin K) is used to prevent bleeding in people with blood clotting problems or too little vitamin K in the body. Phytonadione is in a class of medications called vitamins. It works by providing vitamin K that is needed for blood to clot normally in the body.

• Vitamin K1

An immediate coagulant effect should not be expected after administration of phytonadione.

Phytonadione will not counteract the anticoagulant action of heparin.

When vitamin K1 is used to correct excessive anticoagulant-induced hypoprothrombinemia, anticoagulant therapy still being indicated, the patient is again faced with the clotting hazards existing prior to starting the anticoagulant therapy. Phytonadione is not a clotting agent, but overzealous therapy with vitamin K1 may restore conditions which originally permitted thromboembolic phenomena. Dosage should be kept as low as possible, and prothrombin time should be checked regularly as clinical conditions indicate.

Repeated large doses of vitamin K are not warranted in liver disease if the response to initial use of the vitamin is unsatisfactory. Failure to respond to vitamin K may indicate a congenital coagulation defect or that the condition being treated is unresponsive to vitamin K.

Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

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.

Phytonadione may also be used for purposes not listed in this medication guide.

Before using phytonadione tell your doctor about all your medical conditions or allergies, all medicines you use, and if you are pregnant or breast-feeding.

Never take phytonadione in larger amounts, or for longer than recommended by your doctor.

You should not be treated with phytonadione if you are allergic to it.

Before you receive phytonadione, tell your doctor about all your medical conditions or allergies.

To make sure you can safely take phytonadione, tell your doctor if you have liver disease.

It is not known whether this medicine will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.

It is not known whether phytonadione passes into breast milk or if it could affect the nursing baby. Tell your doctor if you are breast-feeding.

Call your doctor for instructions if you miss a dose of phytonadione.

Tell all medical doctors and dentists you go to that you are taking this medicine.

Always check with your health care professional before you start or stop taking any other medicine. This includes any nonprescription (over-the-counter [OTC]) medicine, even aspirin. Other medicines may change the way this medicine affects your body

Your doctor should check your progress at regular visits. A blood test must be taken regularly to see how fast your blood is clotting. This will help your doctor decide how much medicine you need.

Use this medicine as ordered by your doctor. Read all information given to you. Follow all instructions closely.

• Take with or without food.

What do I do if I miss a dose?

• Take a missed dose as soon as you think about it.
• If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
• Do not take 2 doses at the same time or extra doses.

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

• Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.