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Generic Name: Warfarin sodium
Product Name: Marevan


Used to treat or deep vein thrombosis (blood clots within the legs) and pulmonary embolism (blood clots within the lungs). May also be used to prevent blood clots in those with atrial fibrillation.


Warfarin is an anticoagulant. It prevents the formation of blood clots which may block blood vessels. This prevents occurrences such as heart attacks, strokes and deep vein thrombosis (DVT).

Dose advice

Warfarin tries to keep a balance between prevention of clotting without bleeding excessively.

  • It is important to take warfarin directly according a doctors prescription.
  • Do not take or discontinue any other medication without notifying a doctor.
  • Avoid alcohol.
  • Do not take Warfarin if you are pregnant or wish to become pregnant.
  • Regular prothrombin time tests are essential.
  • Eat a normal, balanced diet and avoid drastic changes to your diet.
  • Report illness or bleeding to a doctor.
  • Seek appropriate medical advice if uncertain.



Common side effects

Haemorrahage (bleeding) is the most common side effect. This may present as internal bleeding and symptoms may include :

  • Paralysis, changes in sensation
  • Headache
  • Pain
  • Dizziness
  • Shortness of breath
  • Difficult breathing or swallowing
  • Unexplained swelling
  • Weakness
  • Purple toes syndrome: Purple patches on feet and toes which wax and wane, legs may also be painful.

Contact your doctor if any of the above are suspected.

Uncommon side effects

Other adverse reaction include:

For further information talk to your doctor.

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Posted On: 22 July, 2003
Modified On: 25 April, 2016

Created by: myVMC