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    Herbs and their Anticoagulant Properties

    Herbs with anticoagulant properties are listed on the left; on the right is the effect of each herb.

    • Alfalfa = Coumarin (acts as an anticoagulant)

    • Angelica = Coumarin

    • Aniseed = Coumarin

    • Arnica = Coumarin

    • Asafoetida = Coumarin, anticoagulant in vivo

    • Bogbean = Hemolytic activity

    • Cassla = Inhibits platelet aggregation

    • Celery, seed or extract = Coumarin

    • Chamomile, German or Roman = Coumarin

    • Clove = Eugenol, a powerful inhibitor of platelet activity

    • Dehydroepiandrosterone (DHEA) = Fibrinolytic potential

    • Evening primrose oil (Primula veris, Primula clatior) = May decrease platelet aggregation and increase thrombolytic activity

    • Feverfew = Inhibits platelet aggregation in vitro

    • Fucus = Anticoagulant action

    • Garlic = May prolong prothrombin time

    • Ginger = Inhibition of platelet activity

    • Ginkgo = Inhibits platelet aggregation

    • Ginseng, Panax = Reduction of blood coagulation/decreases INR

    • Horse chestnut = Coumarin

    • Horseradish = Peroxidase stimulates synthesis of arachidonic acid metabolites

    • Licorice = Inhibition of platelet activity

    • Meadowsweet = Salicylate (acts as an antiplatelet agent)

    • Melilot = Coumarin

    • Poplar = Salicylate

    • Prickly ash, Northern and Southern = Coumarin

    • Quassia = Coumarin

    • Red clover = Coumarin

    • Sweet woodruff = Coumarin

    • Tonka beans = Coumarin

    • Willow = Salicylate