くすりのしおり

Internal
Published: 2/2014

The information on this sheet is based on approvals granted by the Japanese regulatory authority. Approval details may vary by country. Medicines have adverse reactions (risks) as well as efficacies (benefits). It is important to minimize adverse reactions and maximize efficacy. To obtain a better therapeutic response, patients should understand their medication and cooperate with the treatment.
Brand name :
WARFARIN POTASSIUM TABLETS 1mg "NP"
 Active ingredient:
Warfarin potassium
 Dosage form:
white tablet with split line, diameter : 8.0 mm, thickness : 3.3 mm
 Print on wrapping:
(Face)WARFARIN POTASSIUM1mg「NP」, 1mg, ワルファリンK,(Back)ワルファリンK1mg「NP」, ワルファリンK, 1, HD-372

Effects of this medicine

This medicine suppresses the function of vitamin K to inhibit blood clotting, and prevents a blood clot from forming in a blood vessel.
It is usually used in the treatment and prevention of thromboembolism (venous thrombosis, myocardial infarction, pulmonary embolism, cerebral embolism, slow-progress cerebral thrombosis, etc.).

Before using this medicine, be sure to tell your doctor and pharmacist

  • If you have previously experienced any allergic reactions (itch, rash, etc.) to any medicines.
    If you are: bleeding (thrombopenic purpura, bleeding tendency due to angiopathy, hemophilia or coagulopathy, during monthly period, operation, gastrointestinal ulceration, urinary tract bleeding, hemoptysis, misbirth/premature birth/ shortly after delivery, doubt of intracranial hemorrhage) or prone to bleeding (visceral tumor, diverticulitis of the digestive tract, colitis, subacute bacterial endocarditis, hyperpiesia, diabetes).
    If you have: liver disorder, renal disorder, operation/ posttraumatic aftermath.
  • If you are pregnant, possibly pregnant or breastfeeding.
  • If you are taking any other medicinal products. (Some medicines may interact to enhance or diminish medicinal effects. Beware of over-the-counter medicines and dietary supplements as well as other prescription medicines.)

Dosing schedule (How to take this medicine)

  • Your dosing schedule prescribed by your doctor is ((        to be written by a healthcare professional))
  • The daily dosage will be determined by your doctor according to the findings of your blood coagulation test, etc. In general, for adults, initially take 1 to 5 tablets (1 to 5 mg of the active ingredient) at a time, once daily. Continue this dosage for several days, and the maintenance dose is defined after an effect is seen by test. Then onward, a maintenance dose is taken once daily with periodic inspection. Maintenance dose for adults are likely to be 1 to 5 tablets (1 to 5 mg) once daily. Dosage for children will also be determined by the doctor according to the findings of a blood coagulation test. The standard maintenance dosage for infants under the age of 12 months: 0.16 mg/kg/day, for children aged between 1 to under 15: 0.04 to 0.10 mg/kg/day.
    Strictly follow the instructions.
  • If you miss a dose, take a dose as soon as possible. However, if 12 hours or more has already passed since the scheduled time, skip the missed dose and continue your regular dosing schedule. You should never two doses at one time.
  • If you accidentally take more than your prescribed dose, consult with your doctor or pharmacist.
  • Do not stop taking this medicine unless your doctor instructs you to do so.

Precautions while taking this medicine

  • Foods and drinks containing vitamin K in large amount such as natto (fermented soybeans), chlorella, aojiru (green juice), and Saint John's Wort may diminish the effect of the medicine. Refrain from taking them or continuing to consume large amount of them.
  • Drinking alcohol may influence the effect of the medicine. Refrain from drinking while you are receiving the medicine.
  • The medicine has an action to prevent stopping bleeding. Pay attention not to get injured.
  • If you need to undergo a surgery or tooth extraction, consult with your doctor beforehand.
  • If you need to be seen in another medical facility, tell the doctor, dentist or pharmacist in the facility that you are taking the medicine.

Possible adverse reactions to this medicine

The most commonly reported adverse reactions include rash, erythema, hives, dermatitis, fever and itch. If any of these symptoms occur, consult with your doctor or pharmacist.
The symptoms described below are rarely seen as initial symptoms of the adverse reactions indicated in brackets. If any of these symptoms occur, stop taking this medicine and see your doctor immediately.
  • headache, nose/gum bleeding, bruise of limb [bleeding (intraorgan hemorrhage such as cerebral hemorrhage, mucosal hemorrhage, subcutaneous hemorrhage)]
  • redness /pain of the skin surface [skin necrosis]
  • general malaise, loss of appetite, yellowing in the skin or conjunctiva ocular [hepatic dysfunction, jaundice]
The above symptoms do not describe all the adverse reactions to this medicine. Consult with your doctor or pharmacist if you notice any symptoms of concern other than those listed above.

Storage conditions and other information

  • Keep out of the reach of children. Store away from light, heat and moisture.
  • Discard the remainder. Do not store them.

For healthcare professional use only : Day Month Year

For further information, talk to your doctor or pharmacist.

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