Our expert says:
Warfarin is given to make the blood less prone to clotting and to prevent futher lung embolism as this can be fatal. The British Thoracic Society guidelines indicate that one should use Warfarin for 3 months after a pulmonary embolism. It sounds to me as if she may have anemia due to the blood loss - when last did they check her iron levels and full blood count?
There are currently no alternatives to Warfarin and no long term effects, but the risks of Warfarin use includes bleeding, hairloss, tiredness and interactions with other medications.
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