Horse Chestnut

What Is Horse Chestnut?

Horse chestnut is a large deciduous tree with hand-shaped leaves and upright spikes of white flowers, grown for its glossy brown seeds, the conkers. The seed is the medicinal part, taken as a standardised extract for varicose veins and heavy, swollen legs ^{1,20Reference 1Pittler et al. · 2012Meta-analysisHorse chestnut seed extract for chronic venous insufficiency — systematic review and meta-analysisView study →Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}.

The tree grows to 30 m ^{21Reference 21Xia et al.J., & Gadek, PView study →}. It is native to the mountains of the Balkans, and it has been planted as a park and street tree across Europe and North America ^{21,23Reference 21Xia et al.J., & Gadek, PView study →Reference 23North Carolina Extension Gardener Plant Aesculus hippocastanum — plant profile (family, size, origin, poisonous parts)View study →}.

The seed’s active compound is aescin, a mixture of saponins ^{5Reference 5Sirtori · 2001ReviewAescin: pharmacology, pharmacokinetics and therapeutic profile — reviewView study →}. A Cochrane review of seventeen trials found that the seed extract eased leg pain and swelling in chronic venous insufficiency compared with placebo ^{1Reference 1Pittler et al. · 2012Meta-analysisHorse chestnut seed extract for chronic venous insufficiency — systematic review and meta-analysisView study →}.

The raw seed is poisonous, and it is processed before use ^{23Reference 23North Carolina Extension Gardener Plant Aesculus hippocastanum — plant profile (family, size, origin, poisonous parts)View study →}. It is unrelated to the edible sweet chestnut (Castanea sativa).

How Is Horse Chestnut Used?

Horse chestnut is used as a processed extract of the seed. It is not used raw.

• Standardised seed extract — tablets or capsules, taken by mouth for chronic venous insufficiency ^{1,20Reference 1Pittler et al. · 2012Meta-analysisHorse chestnut seed extract for chronic venous insufficiency — systematic review and meta-analysisView study →Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}.
• Liquid extract — of the processed seed, in Western herbal practice.
• Gel or cream — applied to heavy legs and to bruises ^{20Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}.

Traditional Uses

Western Herbal Medicine

The seed, the conker, is the medicinal part. The raw seed is poisonous, so it was dried, roasted or otherwise processed before use, and the bark was used separately as a bitter for fevers.

Western practice used horse chestnut as a venous astringent and anti-inflammatory for varicose veins, haemorrhoids, and heavy, aching, swollen legs. Secondary uses for the seed and bark include rheumatism, neuralgia and sinus congestion.

In the European Union, seed preparations are registered as traditional herbal medicines for heavy, uncomfortable legs from minor circulatory problems, and, applied to the skin, for the swelling and bruising of bruises ^{20Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}.

The name is said to come from the use of the seeds for broken-winded, panting horses.

Indications

• Chronic venous insufficiency: swollen legs, varicose veins, heaviness, pain and calf cramps [standardised seed extract] ^{20Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}
• Heavy, tired legs [seed; EU traditional use]
• Varicose and spider veins [seed; Western herbal medicine]
• Haemorrhoids [seed; Western herbal medicine]
• Swelling after injury or surgery [seed extract]
• Bruises [seed, applied to the skin; EU traditional use]
• Poor peripheral circulation and fluid retention [seed; Western herbal medicine]
• Rheumatism and neuralgia [seed and bark; Western herbal medicine]
• Sinus congestion [seed; Western herbal medicine]

Botany

Horse chestnut is a deciduous tree that grows to 30 m tall, in the maple family (Sapindaceae) ^{21,23Reference 21Xia et al.J., & Gadek, PView study →Reference 23North Carolina Extension Gardener Plant Aesculus hippocastanum — plant profile (family, size, origin, poisonous parts)View study →}. Its leaves are palmate, made of five to seven stalkless leaflets that spread like fingers. Each leaflet is 10–25 cm long, widest towards the tip, with a toothed edge ^{21Reference 21Xia et al.J., & Gadek, PView study →}.

In late spring it bears upright, cone-shaped flower clusters 10–30 cm tall ^{21Reference 21Xia et al.J., & Gadek, PView study →}. Each flower has four or five white petals marked with red spots and a yellow blotch that later turns brown ^{21Reference 21Xia et al.J., & Gadek, PView study →}.

The fruit is a round, brown capsule 2.5–6 cm across, covered in prickles up to 1 cm long ^{21Reference 21Xia et al.J., & Gadek, PView study →}. It holds one to three large seeds, sometimes more. Each seed is glossy chestnut-brown and 2–4 cm across, with a pale scar covering a third to half of its surface ^{21Reference 21Xia et al.J., & Gadek, PView study →}.

The prickly capsule is the easiest way to tell the tree apart ^{21Reference 21Xia et al.J., & Gadek, PView study →}. The seeds, and tea made from the leaves and sprouts, are poisonous ^{23Reference 23North Carolina Extension Gardener Plant Aesculus hippocastanum — plant profile (family, size, origin, poisonous parts)View study →}.

Distribution

Horse chestnut is native to south-eastern Europe, in Albania, Bulgaria, Greece and the former Yugoslavia ^{21Reference 21Xia et al.J., & Gadek, PView study →}. It has been introduced widely elsewhere, and it is a common street and park tree ^{21,23Reference 21Xia et al.J., & Gadek, PView study →Reference 23North Carolina Extension Gardener Plant Aesculus hippocastanum — plant profile (family, size, origin, poisonous parts)View study →}.

In the wild it is assessed as Vulnerable on the IUCN Red List. Its native stands are under pressure from logging, forest fires and tourism, and from the horse-chestnut leaf-miner moth (Cameraria ohridella), which spread from the Balkans across Europe ^{22Reference 22IUCN (2019 · 2019Over half of Europe’s endemic trees face extinction — press release (European Red List of Trees; horse-chestnut assessed as Vulnerable)View study →}.

Sourcing. The medicine comes from the seed, and conkers are gathered in quantity from the planted park, avenue and street trees of Europe. The traded material does not come from the small wild Balkan stands.

When buying, look for an extract with a stated content of triterpene glycosides ^{20Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}. The raw seed is not used, because it carries the toxic fraction that processing removes.

Growing Conditions

Cultivation snapshot for Horse Chestnut

LifeperennialZoneUSDA 3–8

• Full sun to partial shade; it wants an open site with room for a large, spreading crown.
• Prefers deep, moist but well-drained soil, and tolerates a wide range of soil types once established.
• Cold-hardy and long-lived — comfortable across a broad temperate range (roughly USDA zones 3–8).
• Grown easily from fresh conkers, but allow decades and plenty of space; this becomes a 50–75 ft tree.

Grow it yourself

Farm Wiki is our cultivation-focused sister site, also run by Justin Cooke.

How to growComing soon

Find seedsComing soon

Pharmacology & Research

A Cochrane review pooled seventeen randomised trials of standardised seed extract in chronic venous insufficiency. It found less leg pain, smaller leg volume and less swelling than with placebo, and one large trial found the extract about as effective as compression stockings ^{1,2Reference 1Pittler et al. · 2012Meta-analysisHorse chestnut seed extract for chronic venous insufficiency — systematic review and meta-analysisView study →Reference 2Diehm et al. · 1996RCTComparison of leg compression stocking and oral horse-chestnut seed extract therapy in patients with chronic venous insufficiency — randomised controlled trialView study →}. The European Union recognises this as a well-established use ^{20Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}.

The anti-swelling action has been studied in detail: aescin reduces the leak of fluid through capillary walls and raises venous tone ^{4,5Reference 4Bisler et al. · 1986RCTEffects of horse-chestnut seed extract on transcapillary filtration in chronic venous insufficiency — randomised placebo-controlled crossover trialView study →Reference 5Sirtori · 2001ReviewAescin: pharmacology, pharmacokinetics and therapeutic profile — reviewView study →}. The haemorrhoid, antioxidant, antiviral and anticancer findings rest on single trials, cell lines or the isolated saponin ^{5,11,12,13,14Reference 5Sirtori · 2001ReviewAescin: pharmacology, pharmacokinetics and therapeutic profile — reviewView study →Reference 11Kukula-Koch et al. · 2015In vitroInfluence of extrahent on antioxidant capacity of Aesculus hippocastanum seeds — in vitroView study →Reference 12Salinas et al. · 2019In vitroAesculus hippocastanum L. seed extract shows virucidal and antiviral activities against respiratory syncytial virus (RSV) and reduces lung inflammation in vivo — in vitro and animal modelView study →Reference 13Cheong et al. · 2018ReviewMolecular targets and anti-cancer potential of escin — reviewView study →Reference 14Lee et al. · 2014In vitroEscin suppresses migration and invasion involving the alteration of the CXCL16/CXCR6 axis in human gastric adenocarcinoma AGS cells — in vitroView study →}.

Around twelve registered trials have been completed across venous insufficiency, lymphoedema, haemorrhoids and post-operative swelling, and about six are recruiting.

1. Chronic Venous Insufficiency

The 2012 Cochrane review found that horse chestnut seed extract (HCSE) improved the signs and symptoms of chronic venous insufficiency compared with placebo. Leg pain fell significantly in six of seven placebo-controlled trials, and across six trials (n=502) leg volume dropped by a weighted mean of 32 mL ^{1Reference 1Pittler et al. · 2012Meta-analysisHorse chestnut seed extract for chronic venous insufficiency — systematic review and meta-analysisView study →}.

In a 240-patient randomised trial published in the Lancet, HCSE (50 mg aescin twice daily) reduced lower-leg volume by 43.8 mL over 12 weeks, against 46.7 mL with class-II compression stockings, and the two treatments were equivalent ^{2Reference 2Diehm et al. · 1996RCTComparison of leg compression stocking and oral horse-chestnut seed extract therapy in patients with chronic venous insufficiency — randomised controlled trialView study →}.

A separate meta-analysis combined 13 RCTs (1,051 patients) with three large observational studies (10,725 patients). It found less leg volume, pain, oedema and itching than with placebo, but not enough evidence on leg heaviness or calf cramps ^{3Reference 3Siebert et al. · 2002Meta-analysisEfficacy, routine effectiveness, and safety of horsechestnut seed extract in chronic venous insufficiency — meta-analysis of randomised controlled trials and observational studiesView study →}.

In a placebo-controlled crossover trial in 22 patients, a single dose cut the capillary filtration coefficient by 22% within three hours ^{4Reference 4Bisler et al. · 1986RCTEffects of horse-chestnut seed extract on transcapillary filtration in chronic venous insufficiency — randomised placebo-controlled crossover trialView study →}.

Gap: trials are mostly short-term (weeks, not months) and vary in extract and dosing, and the Cochrane authors call for larger definitive RCTs; long-term outcomes are unproven.

2. Edema Reduction

Aescin reduces swelling after surgery and injury as well as in venous disease ^{5Reference 5Sirtori · 2001ReviewAescin: pharmacology, pharmacokinetics and therapeutic profile — reviewView study →}. It lowers vascular permeability and stabilises the capillary wall, limiting the leak of fluid into tissue ^{4,6Reference 4Bisler et al. · 1986RCTEffects of horse-chestnut seed extract on transcapillary filtration in chronic venous insufficiency — randomised placebo-controlled crossover trialView study →Reference 6Domanski et al. · 2016Molecular mechanism for cellular response to β-escin and its therapeutic implicationsView study →}.

The same action produces the leg-volume reductions seen in venous insufficiency, where oedema is the most reproducible measured endpoint ^{1Reference 1Pittler et al. · 2012Meta-analysisHorse chestnut seed extract for chronic venous insufficiency — systematic review and meta-analysisView study →}.

Gap: modern, well-powered placebo-controlled trials specifically for post-surgical or post-traumatic oedema are limited.

3. Anti-Inflammatory

The anti-inflammatory activity of horse chestnut is carried by escin. Escin acts partly by sensitising the glucocorticoid receptor: it has synergistic anti-inflammatory effects with low-dose glucocorticoids in vivo and in vitro ^{8Reference 8Xin et al. · 2011In vitroEscin exerts synergistic anti-inflammatory effects with low doses of glucocorticoids in vivo and in vitroView study →}, and its action correlates with glucocorticoid-receptor/NF-κB signalling rather than the COX/prostaglandin pathway ^{9Reference 9Wang et al. · 2013AnimalAnti-inflammatory effects of escin are correlated with the glucocorticoid receptor/NF-κB signaling pathway, but not the COX/PGF2α signaling pathway — in vivoView study →}.

At the vein wall, aescin blunts hypoxia-induced neutrophil adherence to umbilical-vein endothelial cells ^{7Reference 7Bougelet et al. · 1998In vitroEffect of aescine on hypoxia-induced neutrophil adherence to umbilical vein endothelium — in vitroView study →}. Escin applied to the skin also reduces skin inflammation in animals through the glucocorticoid receptor ^{10Reference 10Zhao et al. · 2018AnimalAnti-inflammatory effect of external use of escin on cutaneous inflammation: possible involvement of the glucocorticoid receptor — animal modelView study →}.

No trial has used inflammation itself as a primary outcome, and most of the mechanism work uses isolated escin.

4. Hemorrhoids

Haemorrhoids are a traditional venotonic indication for horse chestnut. A review of aescin reports satisfactory evidence of clinically significant activity in haemorrhoids, alongside venous insufficiency and post-operative oedema ^{5Reference 5Sirtori · 2001ReviewAescin: pharmacology, pharmacokinetics and therapeutic profile — reviewView study →}.

Gap: dedicated, high-quality RCTs are sparse and often use aescin within multi-ingredient products, making the herb’s own contribution hard to isolate.

5. Antioxidant

Horse chestnut seed carries a polyphenol fraction of flavonol glycosides (rutin, quercetin, kaempferol) and condensed proanthocyanidins ^{18Reference 18Dudek-Makuch et al. · 2015ReviewHorse chestnut – efficacy and safety in chronic venous insufficiency: an overview — review}. Seed extracts scavenge free radicals in vitro, and in one study the most active extract, made with methanol, was also the richest in escin (8.92%) ^{11Reference 11Kukula-Koch et al. · 2015In vitroInfluence of extrahent on antioxidant capacity of Aesculus hippocastanum seeds — in vitroView study →}.

This is laboratory work only, with no human antioxidant-status data.

6. Anticancer

Isolated escin has drawn research interest as an anticancer agent. Reviews catalogue its modulation of NF-κB, STAT3 and apoptotic pathways across several tumour types ^{13Reference 13Cheong et al. · 2018ReviewMolecular targets and anti-cancer potential of escin — reviewView study →}, and escin suppresses migration and invasion of human gastric adenocarcinoma cells via the CXCL16/CXCR6 axis ^{14Reference 14Lee et al. · 2014In vitroEscin suppresses migration and invasion involving the alteration of the CXCL16/CXCR6 axis in human gastric adenocarcinoma AGS cells — in vitroView study →}.

All of it is in vitro or animal work using purified escin, often at concentrations unrelated to oral dosing, with no human oncology trials.

7. Antiviral

One research group found that horse chestnut seed extract and β-escin both have virucidal and antiviral activity against respiratory syncytial virus (RSV) in cell culture ^{12Reference 12Salinas et al. · 2019In vitroAesculus hippocastanum L. seed extract shows virucidal and antiviral activities against respiratory syncytial virus (RSV) and reduces lung inflammation in vivo — in vitro and animal modelView study →}. In mice with RSV lung infection, the seed extract reduced weight loss, viral load and airway inflammation, but β-escin given alone did not ^{12Reference 12Salinas et al. · 2019In vitroAesculus hippocastanum L. seed extract shows virucidal and antiviral activities against respiratory syncytial virus (RSV) and reduces lung inflammation in vivo — in vitro and animal modelView study →}.

It is one unreplicated animal study with no human data behind it.

Mechanisms

Aescin has been studied for raising venous tone, reducing capillary permeability and limiting neutrophil adhesion to the vessel wall ^{4,5,7Reference 4Bisler et al. · 1986RCTEffects of horse-chestnut seed extract on transcapillary filtration in chronic venous insufficiency — randomised placebo-controlled crossover trialView study →Reference 5Sirtori · 2001ReviewAescin: pharmacology, pharmacokinetics and therapeutic profile — reviewView study →Reference 7Bougelet et al. · 1998In vitroEffect of aescine on hypoxia-induced neutrophil adherence to umbilical vein endothelium — in vitroView study →}. Part of its anti-inflammatory action runs through the glucocorticoid receptor and NF-κB ^{8,9Reference 8Xin et al. · 2011In vitroEscin exerts synergistic anti-inflammatory effects with low doses of glucocorticoids in vivo and in vitroView study →Reference 9Wang et al. · 2013AnimalAnti-inflammatory effects of escin are correlated with the glucocorticoid receptor/NF-κB signaling pathway, but not the COX/PGF2α signaling pathway — in vivoView study →}.

Esculin, a coumarin in the raw seed, is toxic and is reduced or removed during processing ^{15Reference 15Wang et al. · 2023ReviewWang, Y., Han, X., Wan, X., et al. (2023). β-Escin: an updated review of its analysis, pharmacology, pharmacokinetics, and toxicity — review. The American Journal of Chinese Medicine. https://pubmed.ncbi.nlm.nih.gov/37865870/View study →}.

Clinical Trials

Registered human trials cluster around venous insufficiency, post-operative swelling and haemorrhoids; several have been completed and several are recruiting. Counts are approximate (ClinicalTrials.gov plus the trials pooled in the Cochrane review).

Last checked: July 2026.

Phytochemistry

The seed’s main active compound is aescin (escin), a mixture of triterpenoid saponin glycosides ^{5Reference 5Sirtori · 2001ReviewAescin: pharmacology, pharmacokinetics and therapeutic profile — reviewView study →}. Total aescin in the raw seed has been reported at about 0.8–4.2% of dry weight, varying with harvest time ^{19Reference 19Impact of harvest time of Aesculus hippo et al. · 2016Industrial Crops and Products. (Total seed aescin reported in the range ~0.82–4.16% depending on harvest time.)}.

Extracts for venous insufficiency are standardised to 6.5–10% triterpene glycosides, calculated as protoaescigenin ^{20Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}. Before 2017 the same extracts were declared as 16–28% triterpene glycosides calculated as aescin, by an older assay ^{20Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}.

The seed also contains two coumarin glycosides, esculin (aesculin) and fraxin. Esculin is reduced or removed during processing because of its toxicity ^{15Reference 15Wang et al. · 2023ReviewWang, Y., Han, X., Wan, X., et al. (2023). β-Escin: an updated review of its analysis, pharmacology, pharmacokinetics, and toxicity — review. The American Journal of Chinese Medicine. https://pubmed.ncbi.nlm.nih.gov/37865870/View study →}.

A smaller polyphenol fraction holds flavonol glycosides such as rutin, quercetin and kaempferol, and condensed proanthocyanidins ^{18Reference 18Dudek-Makuch et al. · 2015ReviewHorse chestnut – efficacy and safety in chronic venous insufficiency: an overview — review}.

Constituent Summary

Figures are share of the dry seed; the extract figure refers to the finished extract.

Dosage

Clinical doses are for a standardised seed extract. The raw seed contains toxic esculin, which the extraction process removes, so a home preparation of the whole seed is a different and unsafe preparation.

Research Doses

Traditional Dosage

The EU monograph says at least four weeks of treatment may be needed before any benefit is seen ^{20Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}.

Safety & Pregnancy

Standardised horse chestnut seed extract is well tolerated in trials. The raw seed is poisonous if eaten.

Full Safety Detail

Standardised extract. Side effects were mild and infrequent across the pooled Cochrane trials ^{1Reference 1Pittler et al. · 2012Meta-analysisHorse chestnut seed extract for chronic venous insufficiency — systematic review and meta-analysisView study →}. The EU monograph lists stomach complaints, headache, dizziness, itching and allergic reactions, of unknown frequency; applied to the skin, the gel can cause itching and redness ^{20Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}.

Raw seed. Raw or poorly processed seed contains esculin (aesculin), a toxic coumarin glycoside that quality extracts remove or reduce. The whole raw plant, seed, leaf, bark and flower, is poisonous if eaten ^{23Reference 23North Carolina Extension Gardener Plant Aesculus hippocastanum — plant profile (family, size, origin, poisonous parts)View study →}, and children who swallow raw conkers can develop bleeding and stomach upset ^{15Reference 15Wang et al. · 2023ReviewWang, Y., Han, X., Wan, X., et al. (2023). β-Escin: an updated review of its analysis, pharmacology, pharmacokinetics, and toxicity — review. The American Journal of Chinese Medicine. https://pubmed.ncbi.nlm.nih.gov/37865870/View study →}. Conkers can be mistaken for edible sweet chestnuts (Castanea sativa), and this has caused poisonings.

Bleeding. Aescin can affect blood clotting ^{16Reference 16Yan et al. · 2025ReviewEfficacy and mechanism of escin in improving the tissue microenvironment of blood vessel walls via anti-inflammatory and anticoagulant effects — reviewView study →}, so take care with anticoagulant or antiplatelet medication. No human drug-interaction study has been done, and the EU monograph reports no known interactions ^{20Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}.

Drug metabolism. In rats given aescin by injection, activity of the drug-metabolising enzyme CYP1A2 rose while CYP2C9 and CYP3A4 activity fell. This has not been tested with oral horse chestnut in people ^{24Reference 24Huang et al. · 2014AnimalEffects of aescin on cytochrome P450 enzymes in rats — animal modelView study →}.

Kidney, liver and heart. Aescin is metabolised by the liver and kidneys ^{15Reference 15Wang et al. · 2023ReviewWang, Y., Han, X., Wan, X., et al. (2023). β-Escin: an updated review of its analysis, pharmacology, pharmacokinetics, and toxicity — review. The American Journal of Chinese Medicine. https://pubmed.ncbi.nlm.nih.gov/37865870/View study →}, and it is avoided in kidney or liver disease as a precaution. The EU monograph advises seeing a doctor first with kidney or heart failure, inflamed skin, thrombophlebitis, hardening under the skin, severe pain, ulcers or sudden swelling of one or both legs ^{20Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}.

Age. Taken by mouth, or as a gel for heavy legs, it is not recommended under 18 ^{20Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}. The gel for bruises may be used from age 12 ^{20Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}. The gel is not for broken skin, the area around the eyes or mucous membranes ^{20Reference 20European Medicines Agency · 2020ReviewEuropean Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1)View study →}.

Contraindications

• Pregnancy
• Breast feeding
• Kidney disease
• Liver disease
• Anticoagulant medication use

References

1. Pittler, M. H., & Ernst, E. (2012). Horse chestnut seed extract for chronic venous insufficiency — systematic review and meta-analysis. Cochrane Database of Systematic Reviews. https://pubmed.ncbi.nlm.nih.gov/23152216/
2. Diehm, C., Trampisch, H. J., Lange, S., et al. (1996). Comparison of leg compression stocking and oral horse-chestnut seed extract therapy in patients with chronic venous insufficiency — randomised controlled trial. Lancet. https://pubmed.ncbi.nlm.nih.gov/8569363/
3. Siebert, U., Brach, M., Sroczynski, G., et al. (2002). Efficacy, routine effectiveness, and safety of horsechestnut seed extract in chronic venous insufficiency — meta-analysis of randomised controlled trials and observational studies. International Angiology. https://pubmed.ncbi.nlm.nih.gov/12518108/
4. Bisler, H., Pfeifer, R., Klüken, N., et al. (1986). Effects of horse-chestnut seed extract on transcapillary filtration in chronic venous insufficiency — randomised placebo-controlled crossover trial. Deutsche Medizinische Wochenschrift. https://pubmed.ncbi.nlm.nih.gov/3527643/
5. Sirtori, C. R. (2001). Aescin: pharmacology, pharmacokinetics and therapeutic profile — review. Pharmacological Research. https://pubmed.ncbi.nlm.nih.gov/11529685/
6. Domanski, D., Zegrocka-Stendel, O., Perzanowska, A., et al. (2016). Molecular mechanism for cellular response to β-escin and its therapeutic implications. PLoS ONE. https://pubmed.ncbi.nlm.nih.gov/27727329/
7. Bougelet, C., Roland, I. H., Ninane, N., et al. (1998). Effect of aescine on hypoxia-induced neutrophil adherence to umbilical vein endothelium — in vitro. European Journal of Pharmacology. https://pubmed.ncbi.nlm.nih.gov/9593599/
8. Xin, W., Zhang, L., Sun, F., et al. (2011). Escin exerts synergistic anti-inflammatory effects with low doses of glucocorticoids in vivo and in vitro. Phytomedicine. https://pubmed.ncbi.nlm.nih.gov/20850956/
9. Wang, H., Zhang, L., Jiang, N., et al. (2013). Anti-inflammatory effects of escin are correlated with the glucocorticoid receptor/NF-κB signaling pathway, but not the COX/PGF2α signaling pathway — in vivo. Experimental and Therapeutic Medicine. https://pubmed.ncbi.nlm.nih.gov/24137201/
10. Zhao, S. Q., Xu, S. Q., Cheng, J., et al. (2018). Anti-inflammatory effect of external use of escin on cutaneous inflammation: possible involvement of the glucocorticoid receptor — animal model. Chinese Journal of Natural Medicines. https://pubmed.ncbi.nlm.nih.gov/29455725/
11. Kukula-Koch, W., Kędzierski, B., Głowniak, K., et al. (2015). Influence of extrahent on antioxidant capacity of Aesculus hippocastanum seeds — in vitro. Natural Product Research. https://pubmed.ncbi.nlm.nih.gov/25109836/
12. Salinas, F. M., Vázquez, L., Gentilini, M. V., et al. (2019). Aesculus hippocastanum L. seed extract shows virucidal and antiviral activities against respiratory syncytial virus (RSV) and reduces lung inflammation in vivo — in vitro and animal model. Antiviral Research. https://pubmed.ncbi.nlm.nih.gov/30711418/
13. Cheong, D. H. J., Arfuso, F., Sethi, G., et al. (2018). Molecular targets and anti-cancer potential of escin — review. Cancer Letters. https://pubmed.ncbi.nlm.nih.gov/29474858/
14. Lee, H. S., Hong, J. E., Kim, E. J., et al. (2014). Escin suppresses migration and invasion involving the alteration of the CXCL16/CXCR6 axis in human gastric adenocarcinoma AGS cells — in vitro. Nutrition and Cancer. https://pubmed.ncbi.nlm.nih.gov/24911042/
15. Wang, Y., Han, X., Wan, X., et al. (2023). β-Escin: an updated review of its analysis, pharmacology, pharmacokinetics, and toxicity — review. The American Journal of Chinese Medicine. https://pubmed.ncbi.nlm.nih.gov/37865870/
16. Yan, L., Zhang, Y., Li, Y., et al. (2025). Efficacy and mechanism of escin in improving the tissue microenvironment of blood vessel walls via anti-inflammatory and anticoagulant effects — review. Open Life Sciences. https://pubmed.ncbi.nlm.nih.gov/41245382/
17. Bencsik, T., Balázs, V. L., Farkas, Á., et al. (2024). Herbal drugs in chronic venous disease treatment: an update — review. Fitoterapia. https://pubmed.ncbi.nlm.nih.gov/39419127/
18. Dudek-Makuch, M., & Studzińska-Sroka, E. (2015). Horse chestnut – efficacy and safety in chronic venous insufficiency: an overview — review. Revista Brasileira de Farmacognosia, 25(5), 533–541.
19. Impact of harvest time of Aesculus hippocastanum seeds on the composition, antioxidant capacity and total phenolic content (2016). Industrial Crops and Products. (Total seed aescin reported in the range ~0.82–4.16% depending on harvest time.)
20. European Medicines Agency, Committee on Herbal Medicinal Products (HMPC). (2020). European Union herbal monograph on Aesculus hippocastanum L., semen — regulatory monograph (final, revision 1). EMA/HMPC/628242/2018. https://www.ema.europa.eu/en/documents/herbal-monograph/european-union-herbal-monograph-aesculus-hippocastanum-l-semen-final-revision-1_en.pdf
21. Xia, N., Turland, N. J., & Gadek, P. A. (n.d.). Aesculus hippocastanum Linnaeus — species description and native range — flora. In Wu, Z. Y., & Raven, P. H. (eds.), Flora of China, Vol. 12 (Hippocastanaceae). http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200013160
22. IUCN (2019, 27 September). Over half of Europe’s endemic trees face extinction — press release (European Red List of Trees; horse-chestnut assessed as Vulnerable). https://iucn.org/news/species/201909/over-half-europes-endemic-trees-face-extinction
23. North Carolina Extension Gardener Plant Toolbox (n.d.). Aesculus hippocastanum — plant profile (family, size, origin, poisonous parts). NC State Extension. https://plants.ces.ncsu.edu/plants/aesculus-hippocastanum/
24. Huang, Y., Zheng, S. L., Zhu, H. Y., et al. (2014). Effects of aescin on cytochrome P450 enzymes in rats — animal model. Journal of Ethnopharmacology. https://pubmed.ncbi.nlm.nih.gov/24252494/

View all 24 references▾