Anticoagulant plants

Anticoagulant herbs: Plants that diminish blood clotting

What are anticoagulant plants?

ANTICOAGULANT or ANTIPLATELET plants are those that decrease the ability of fluidization of blood. They are also mentioned as blood thinners. This effect occurs because they are substances that block the coagulant effect of vitamin K.

What are anticoagulant plants used for?

Anticoagulant plants can very be appropriate in phytotherapy to treat or prevent the onset of anomalies, such as thrombi or blood clots, due to poor blood supply as a result of excessive platelet aggregation.

For example, the use of these plants may be appropriate to remedy conditions in which blood flow should be more fluid as heart attacks, angina pectoris, arteriosclerosis, etc.

main anticoagulant medicinal plants

Summary sheet of the main anticoagulant medicinal plants. They should not be combined with each other or with drugs that have the same effect because there is a risk of bleeding.

Is it dangerous to use anticoagulant plants?

Any mismatch in the dose of anticoagulants can cause a lack of clotting and therefore heavy bleeding that can be fatal.

Other times it may be counterproductive to use some of these plants in people who are prone to ailments caused by a lack of clotting and nose bleeding, hematomas, etc. Within this group are some plants such as willow thinners, garlic, onions, thyme, rosemary, ginseng and licorice.

It is necessary to consider that the use of remedies that contain anticoagulants is not recommended before and after surgical procedures because they can increase bleeding from the wound.

For this reason, you should always consult a doctor before taking any of the following plants:

Main anticoagulant plants

Among the main anticoagulant plants, we include the following:

  • Ginkgo (Ginkgo biloba): Ginkgo is one of the best remedies to improve blood flow. The reason lies in the ability of extracts of this plant to dilate blood vessels and cause blood to flow more smoothly.

It seems that flavonoids exert a vasodilating action on the walls of arteries and capillaries while prevent platelets settle within blood vessels. This property can be applied to treat a number of diseases the reason of which lies in poor circulation. (Teas or capsules as suggested in the patients leaflets)



  • Ginseng (Panax ginseng): Mainly because it contains magnesium. Ginseng, because it contains antiplatelet and vasodilatory components improves blood circulation to maintain the capillaries clean and dilated.
  • Willow (Salix spp.): Mainly because it contains salicin, magnesium and quercetin. Willows have been used and are still being used as an alternative to aspirin (aspirin). Aspirin relieves pain and inflammation and it is used as a blood thinner. Aspirin was produced initially from this plant and from meadowsweet (Filipendula ulmaria), from wintergreen (Gaultheria sp.) from poplars (Populus spp.) And from some species of birches (Betula spp.) before it was chemically synthesized in 1890.
  • Garlic (Allium sativum): The presence of sulfur, alliin, and ajoene, makes it very important to give this plant antithrombotic properties (no formation of blood clots) which makes it well suited to thin blood circulation and prevents or fights circulatory diseases. (See contraindications)
  • Horse chestnut (Aesculus hippocastanum): This plant is widely used in herbal medicine to improve circulation because it has venotonic and anticoagulant effects. Not for use in combination with drugs for circulation.

Contraindications to anticoagulant medicines

When anticoaculant remedies are combined (drugs, plants and / or food) there is a high risk of bleeding. This means that you should not combine these plants with other remedies for circulation or blood-thinning medications.

The use of anticoagulant plants can also be counterproductive in people who are prone to diseases caused by a lack of clotting such in frequent bleeding nose, bruises, etc.

* More information: Contraindications of anticoagulants

Plants with powerful blood fluidifying properties

Besides those mentioned above, many other plants that may have anticoagulant effects. Among the most common are those rich in coumarins. Coumarins block vitamin K preventing thrombin formation (coagulation factor IIa), which is required to clot is formed.

  • Alfalfa (Medicago sativa): Because of its coumarin content, alfalfa prevents blood clotting. It should not be combined with drugs that have the same effect.
  • Clover (Trifolium pratense): With a lot of coumarin content, clover prevents blood clotting. It should not be combined with drugs that have the same effect.


Photo of meadowsweet

  • Meadowsweet (Filipendula ulmaria): Its wealth of salicylic acid and coumarins prevents blood clotting. It should not be combined with drugs that have the same effect.
  • Rue (Ruda graveolens): It contains coumarins as bergapteno with potent anticoagulant properties. Not to be combined with blood-thinning medications.
  • Anise (Pimpinella anisum): It contains coumarin with anticoagulant properties. Do not use with drugs that have the same effect.
  • Sen (Cassia acutifolia): It has coumarins and anthraquinone with potent anticoagulant properties. However its usual use is not recommended because it causes intestinal dependence as a laxative.
  • Fenugreek (Trigonella foenum-graecum): It contains coumarins and saponins with anticoagulant properties.
  • Agrimony (Agrimonia eupatoria): with coumarin.

Food modifies the effect of anticoagulants

Some plants with anticoagulant properties have other properties that make them equally suitable to prevent bleeding, because they have bioflavonoids that increase the elasticity of the capillaries, as is the case of bioflavonoids from citrus ( lemons, oranges, tangerines, etc.)

This antagonistic effect of different food components indicates that food can modify or enhance the effect of plants and thinning medications.

Due to the complexity of the subject, it is advisable to always consult a doctor or specialist.

Other anticoagulants plants

There are many plants with anticoagulant components. Among them, we can mention the following:

  • Onion: (Allium cepa) Mainly because of its content in allicin and alliin, as well as magnesium and quercetin

Photo of onions

Photo of onions

  • Fennel: (Foeniculum vulgare) Mainly because of its content in estragol and magnesium.
  • Grapefruit: (Citrus paradisii) Mainly because of its content in alpha linolenic acid
  • Soybean: (Glycine max) Mainly because of its content in alpha linolenic acid, (Vitamin C), genistein and pyroxidine
  • Thyme: (Thymus vulgaris) Mainly because it contains alpha-linolenic acid, rosmarinic acid, magnesium and thymol
  • Oregano: (Origanum vulgare.) Mainly because of its content in alpha-linolenic acid, caffeic acid, rosmarinic acid, magnesium and thymol
  • Cauliflower (Brassica oleracea var botrytis) Mainly because it contains alpha-linolenic acid, caffeic acid, ferulic acid, magnesium and selenium. However, raw cauliflower is very rich in vitamin K, that is very necessary for blood clotting.
  • Green Tea: (Camellia sinensis) Mainly because of catechins, epicatechin, quercetin, rutin and magnesium.
  • Currant: (Ribes spp.) Mainly because of magnesium, catechins and alpha-linoleic acid
  • Celery (Apium graveolens) Mainly because of its content in bergapten and rutin
  • Carrot: (Daucus carota) Mainly because of its content in bergapten, falcarindiol, magnesium, and selenium myristicin.
  • Liquorice: (Glyzyrrhiza glabra) Mainly because of its content in, iisoliquiritigenin, magnesium, eugenol and estragol,
  • Banana tree (Musa paradisiaca) Mainly because of its content in alpha linoleic acid, tocopherol, magnesium and selenium.
  • Parsley: (Petroselinum crispum) Mainly because of its content in myristicin, magnesium and selenium.
  • Pineapple: (Carica papaya) Mainly because of its citric acid content.
  • Papaya: (Ananas comosus) Mainly because of its content in citric acid and papain.
  • Boldo (Peumus boldus): It contains coumarins
  • Cinnamon (Cinnamomum spp.) Coumarins mainly

More information on anticoagulant and coagulant plants.

Written by Editorial Botanical-online team in charge of content writing

18 July, 2023

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