Herb Root (根 gēn)

Dan Shen

Red sage root · 丹参

Salvia miltiorrhiza Bge. · Radix et Rhizoma Salviae Miltiorrhizae

Also known as: Chi Shen (赤参), Zi Dan Shen (紫丹参), Hong Gen (红根)

Dan Shen (Red sage root) plant

Images shown are for educational purposes only

Dan Shen (red sage root) is one of the most widely used herbs in Chinese medicine for promoting healthy blood circulation and relieving pain caused by poor blood flow. It is best known for supporting heart and cardiovascular health, easing menstrual irregularities and pain, and calming restlessness or insomnia. Its cool nature also makes it helpful for conditions involving both blood stagnation and excess heat in the body.

Category Blood-invigorating and stasis-dispelling herbs (活血化瘀药)
Therapeutic focus Cardiovascular Health Menstrual Health Sleep and Anxiety Support Pain Management Circulation Support

TCM Properties

Temperature

Slightly Cool

Taste

Bitter (苦 kǔ)

Channels entered

Heart, Liver, Pericardium

Parts used

Root (根 gēn)

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What This Herb Does

Every herb has a specific set of actions — here's what Dan Shen does in the body, explained in both everyday and TCM terms

Therapeutic focus

In practical terms, Dan Shen is primarily used to support these areas of health:

Cardiovascular Health Menstrual Health Sleep and Anxiety Support Pain Management Circulation Support

TCM Actions

In TCM terminology, these are the specific therapeutic actions that Dan Shen performs to restore balance in the body:

Invigorates Blood and Dispels Stasis Promotes menstruation and alleviates pain Clears Heart Fire and Eliminates Irritability Cools the Blood and reduces swelling Nourishes Blood and Calms the Spirit

How these actions work

'Invigorates Blood and dispels stasis' is Dan Shen's primary and most celebrated action. It means this herb actively promotes blood circulation and breaks up stagnant blood that has accumulated in the body. Blood stasis (stuck or sluggish blood flow) can cause sharp, fixed, stabbing pains in the chest or abdomen, formation of masses, or darkened complexion and tongue. Dan Shen is considered one of the most important herbs in the entire Materia Medica for treating blood stasis conditions. A classical saying states that "a single herb Dan Shen has the function of the whole Four-Substance Decoction" (一味丹参，功同四物), highlighting its versatility in treating blood disorders.

'Promotes menstruation and alleviates pain' means Dan Shen helps restore normal menstrual flow when periods are irregular, painful, absent, or scanty due to blood stasis in the uterus. It is widely regarded as a key gynaecological herb. The pain-relieving action extends beyond menstrual pain to chest pain, epigastric pain, and joint pain caused by blood stasis and Heat.

'Clears Heat from the Heart and relieves restlessness' refers to Dan Shen's ability to calm the mind when pathogenic Heat has entered the deeper levels of the body (the nutritive or Blood level). In febrile diseases where Heat disturbs the Heart, symptoms such as high fever worse at night, delirium, irritability, and insomnia may appear. Dan Shen's bitter and cool nature allows it to enter the Heart channel and clear this Heat while calming the spirit. For everyday restlessness and insomnia from milder Heat patterns, it is often combined with calming herbs like Suan Zao Ren (sour jujube seed).

'Cools the Blood and reduces swelling' means that when Heat toxins cause painful sores, abscesses, or skin lesions, Dan Shen can cool the Blood and disperse the stagnation that feeds the swelling. It is particularly noted for early-stage breast abscesses and hot, swollen skin conditions.

'Nourishes the Blood and calms the spirit' is a secondary action. While Dan Shen primarily moves Blood, it also has a gentle nourishing quality. When Blood fails to nourish the Heart, symptoms like palpitations, anxiety, and poor sleep can arise. Dan Shen helps generate new blood while calming the spirit, making it useful for insomnia and heart palpitations, especially when combined with tonifying herbs.

Patterns Addressed

In TCM, symptoms cluster into recognizable patterns of disharmony. Dan Shen is used to help correct these specific patterns.

Why Dan Shen addresses this pattern

Dan Shen is one of the foremost herbs for treating Blood Stasis (瘀血 yū xuè). Its bitter flavour descends and moves, while its cool temperature prevents it from generating further Heat. Entering the Heart and Liver channels, it directly reaches the blood vessels and the organ most responsible for storing and regulating blood flow. It powerfully invigorates blood circulation, breaks up accumulated stasis, and reopens obstructed pathways. Unlike many blood-moving herbs that are warm and drying, Dan Shen's slightly cool nature makes it especially suitable when Blood Stasis is accompanied by Heat signs such as a dark red tongue, fixed burning pain, or restlessness.

A practitioner would look for one or more of these signs

Chest Pain

Stabbing or fixed chest pain (chest tightness)

Abdominal Pain

Sharp, fixed abdominal or epigastric pain

Painful Menstruation

Menstrual pain with dark clotted blood

Amenorrhea

Absent periods due to blood stagnation

Commonly Used For

These are conditions where Dan Shen is frequently used — but only when they arise from the specific patterns it addresses, not in all cases

Arises from: Blood Stasis

TCM Interpretation

In TCM, angina and coronary heart disease fall under the classical category of 'chest impediment' (胸痹 xiōng bì). The fundamental problem is obstruction of Qi and Blood flow in the Heart vessels. Blood Stasis in the Heart channel blocks the free circulation that the Heart needs to function, causing stabbing or pressing chest pain, a feeling of tightness, and in severe cases pain radiating to the back or arm. Contributing factors often include Qi stagnation (from emotional stress), Phlegm accumulation, or Cold congealing the vessels. The tongue is typically dark or purplish with possible stasis spots, and the pulse may be choppy or wiry.

Why Dan Shen Helps

Dan Shen is arguably the single most important herb used in modern TCM practice for coronary heart disease. Its primary action of invigorating Blood and dispelling stasis directly addresses the core pathomechanism of Heart Blood Stasis causing chest pain. Entering the Heart channel, it reaches the site of disease directly. Its slightly cool nature is advantageous because stasis often generates secondary Heat. Modern pharmacological research has shown that Dan Shen's active compounds (tanshinones and salvianolic acids) can improve microcirculation, inhibit platelet aggregation, and protect ischaemic heart muscle. The well-known Compound Danshen Dripping Pills (复方丹参滴丸), combining Dan Shen with San Qi and Bing Pian, has been widely used for angina and has completed FDA Phase III clinical trials.

Also commonly used for

Amenorrhea

Absent periods from blood stasis obstruction

Irregular Menstruation

Menstrual irregularity with blood stasis signs

Palpitations

Palpitations from blood deficiency or stasis

Abdominal Pain

Epigastric or abdominal pain from Qi stagnation and Blood stasis

Hepatomegaly

Liver enlargement with blood stasis

Skin Abscess

Hot, swollen sores and early-stage breast abscesses

Moving Pain

Hot, painful joints (Heat-type painful obstruction)

Chronic Hepatitis

Chronic liver inflammation with blood stasis

Herb Properties

Every herb has an inherent temperature, taste, and affinity for specific channels — these properties determine how it interacts with the body

Temperature

Slightly Cool

Taste

Bitter (苦 kǔ)

Channels Entered

Heart Liver Pericardium

Parts Used

Root (根 gēn)

Dosage & Preparation

These are general dosage guidelines for Dan Shen — always follow your practitioner's recommendation, as dosages vary based on the formula and your individual condition

Standard dosage

10-15g

Maximum dosage

Up to 30g in decoction for severe Blood stasis conditions such as acute chest pain or fixed abdominal masses, under practitioner supervision. Some modern clinical applications for cardiovascular disease use doses in this range.

Dosage notes

Use the standard dose of 10-15g for most Blood stasis conditions including menstrual irregularity, chest pain, and restlessness. For more severe presentations such as fixed masses, intense chest pain from coronary artery disease, or stubborn Blood stasis, the dose may be increased to 15-30g. When used primarily for its calming and Heart-clearing effects (such as insomnia or anxiety with Heat signs), the lower end of the dose range (10-12g) is usually sufficient. In formulas where Dan Shen is combined with other Blood-moving herbs, keep toward the lower dose to avoid excessive anticoagulant effect.

Preparation

No special decoction handling is required. Dan Shen is decocted normally with other herbs. However, post-harvest processing is notable: the roots should not be washed with water immediately after digging, as this causes loss of water-soluble active compounds and darkens the cross-section to an undesirable black-purple colour. Instead, the roots are air-dried, bundled, and "sweated" (堆积发汗) before final drying and slicing.

Processing Methods

In TCM, the same herb can be prepared in different ways to change its effects — here's how processing alters what Dan Shen does

Processing method

Dan Shen slices are mixed with rice wine (huáng jiǔ), allowed to absorb the wine until saturated, then stir-fried over low heat until dry. Standard ratio: 10 kg rice wine per 100 kg of Dan Shen slices.

How it changes properties

Wine processing moderates Dan Shen's cool nature, making it less cold and more neutral-warm in its overall action. The wine enhances its ability to enter the blood vessels and strengthens its blood-invigorating and stasis-dispelling power. Research shows wine-processed Dan Shen has significantly stronger antiplatelet and anticoagulant effects compared to the raw form. The water-soluble phenolic compound content also increases after wine processing.

When to use this form

Preferred for Blood Stasis conditions where the primary goal is to strongly move blood, such as menstrual irregularity, amenorrhoea, blood stasis causing abdominal masses, and cardiovascular conditions. Especially appropriate when the patient does not have significant Heat signs, or when the cool nature of raw Dan Shen might impede digestion or weaken a patient with Cold constitution.

Common Herb Pairs

These ingredients are traditionally combined with Dan Shen for enhanced therapeutic effect

Tan Xiang
Tan Xiang Dan Shen 30g : Tan Xiang 5g (6:1)

Dan Shen invigorates Blood and dispels stasis while Tan Xiang (sandalwood) moves Qi and warms the middle. Together they address the common clinical situation where Qi stagnation and Blood stasis are intertwined, as stagnant Qi often leads to stuck Blood. Tan Xiang's warm, aromatic Qi-moving nature complements Dan Shen's cool Blood-moving action, creating a balanced approach that treats both aspects simultaneously.

When to use: Chest pain or epigastric pain from Qi stagnation and Blood stasis, particularly in chest impediment (coronary heart disease) or stomach pain. This is the core pairing in Dan Shen Yin.

Sha Ren
Sha Ren Dan Shen 30g : Sha Ren 5g (6:1)

Dan Shen moves Blood while Sha Ren (cardamom) aromatically transforms Dampness and moves Qi in the middle burner. Sha Ren's warm, fragrant quality counterbalances Dan Shen's cool nature, preventing it from impeding digestion. Together they open up both Qi and Blood stagnation in the epigastric and abdominal region.

When to use: Epigastric and stomach pain with bloating, distension, and a sense of stuffiness, caused by both Qi stagnation and Blood stasis. This pair appears alongside Tan Xiang in Dan Shen Yin.

San Qi
San Qi 1:1 or Dan Shen in larger proportion

Both herbs invigorate Blood and alleviate pain, but through different mechanisms. Dan Shen is cool and excels at clearing Heat while moving Blood; San Qi (notoginseng) is warm and uniquely stops bleeding while simultaneously dispersing stasis. Together they powerfully promote circulation and relieve chest pain without the risk of excessive bleeding, as San Qi's haemostatic action tempers Dan Shen's strong blood-moving quality.

When to use: Coronary heart disease, angina, and other cardiovascular conditions with Blood Stasis. This is the foundational pair in Compound Danshen formulations (复方丹参片/滴丸).

Suan Zao Ren
Suan Zao Ren 1:2 (Dan Shen 10g : Suan Zao Ren 15-20g)

Dan Shen cools the Heart and calms the spirit while Suan Zao Ren (sour jujube seed) nourishes Heart Blood and Liver Yin to deeply anchor the spirit. Dan Shen moves Blood so that nourishment reaches the Heart; Suan Zao Ren's sour-sweet taste astringes and nourishes. Together they address both the deficiency and the Heat component of insomnia.

When to use: Insomnia and palpitations from Heart Blood deficiency with restlessness, especially when there are mild Heat signs such as a red tongue tip or irritability.

Key Formulas

These well-known formulas feature Dan Shen in a prominent role

Dan Shen Yin 丹参饮 King

The definitive showcase of Dan Shen's Blood-invigorating and pain-relieving actions. Dan Shen serves as the sole King herb at 30g (six times the dose of the other two ingredients), directly demonstrating its core ability to invigorate Blood and relieve pain in the chest and stomach. From the Shi Fang Ge Kuo, this elegant three-herb formula pairs Dan Shen with Tan Xiang and Sha Ren for Qi stagnation and Blood stasis causing heart and stomach pain.

Qing Ying Tang 清营汤 Assistant

Showcases Dan Shen's ability to clear Heat at the nutritive (Ying) level and prevent Heat from binding with Blood. In Wu Jutong's Wen Bing Tiao Bian formula for Heat entering the nutritive level, Dan Shen serves as an assistant at 6g, using its cool Blood-moving action to disperse stasis and prevent deeper Blood-level complications during febrile disease.

Tian Wang Bu Xin Dan 天王补心丹 Assistant

Highlights Dan Shen's secondary action of nourishing Heart Blood and calming the spirit. In this famous Heart-nourishing formula from the She Sheng Mi Pou, Dan Shen clears Heart Heat and promotes blood circulation so that the formula's tonifying herbs can nourish without causing stagnation. Classical commentary notes that Dan Shen 'clears heat in the blood, paired with blood-nourishing herbs so that supplementation does not stagnate, and Heart Blood is easily generated.'

Comparable Ingredients

These ingredients have overlapping uses — here's how to tell them apart

Chi Shao
Dan Shen vs Chi Shao

Both Dan Shen and Chi Shao (red peony root) invigorate Blood and clear Heat. However, Dan Shen has a broader scope: it enters the Heart channel strongly and is used for chest pain, insomnia, and spirit-calming, whereas Chi Shao focuses more narrowly on cooling the Blood and clearing Liver Heat to treat bleeding, eye redness, and skin eruptions. Dan Shen also has a nourishing quality that Chi Shao lacks. Choose Dan Shen for Heart-related Blood Stasis with restlessness; choose Chi Shao for Blood Heat with bleeding or Liver-channel Heat.

Chuan Xiong
Dan Shen vs Chuan Xiong

Both are premier blood-moving herbs, but their temperatures and channel affinities differ significantly. Chuan Xiong (Sichuan lovage root) is warm and pungent, excelling at moving Qi and Blood upward to treat headaches, and it strongly promotes Qi circulation alongside Blood movement. Dan Shen is cool and bitter, better suited when Blood Stasis is accompanied by Heat signs or when the Heart and spirit are involved. Choose Chuan Xiong for headaches and Cold-type Blood Stasis; choose Dan Shen for Heart-related stasis, Heat patterns, and insomnia.

Tao Ren
Dan Shen vs Tao Ren

Both strongly invigorate Blood and dispel stasis. Tao Ren (peach kernel) is neutral in temperature and has an additional action of moistening the intestines to relieve constipation. Dan Shen is cool and has the added benefit of clearing Heart Heat and calming the spirit. For Blood Stasis with dry stools, Tao Ren is preferred; for Blood Stasis with Heat signs, restlessness, or insomnia, Dan Shen is the better choice.

Common Substitutes & Adulterants

Related species and common adulterations to be aware of when sourcing Dan Shen

Dan Shen may be confused with or substituted by roots of other Salvia species. Salvia przewalskii (甘西鼠尾草) from northwest China has similar red roots but different phytochemical profiles and lower levels of key active compounds like tanshinone IIA and salvianolic acid B. Salvia yunnanensis (滇丹参) from Yunnan is another related species sometimes sold as Dan Shen. These substitutes can be distinguished by their different root morphology (often thinner or differently coloured), geographic origin, and lower content of marker compounds on laboratory analysis. Authentic Dan Shen (Salvia miltiorrhiza) should have a distinctly reddish-brown exterior, purplish-red cross-section, and characteristic bitter taste. Thin-layer chromatography comparing against reference standards for tanshinone IIA and salvianolic acid B is the standard pharmacopoeia method for authentication.

Educational content — always consult a qualified healthcare provider or TCM practitioner before using any herb.

Toxicity Classification

Classical Chinese pharmacopoeia toxicity rating for Dan Shen

Non-toxic

Dan Shen is classified as non-toxic in both classical texts and the Chinese Pharmacopoeia. The Shen Nong Ben Cao Jing listed it as a top-grade herb suitable for long-term use. At standard therapeutic doses (10-15g), it has a well-established safety profile. The primary safety concern is not toxicity per se but its strong blood-activating pharmacological effects, which can cause or worsen bleeding, particularly when combined with anticoagulant or antiplatelet drugs. Adverse effects at normal doses may occasionally include mild gastrointestinal upset, dizziness, or allergic reactions in sensitive individuals.

Contraindications

Situations where Dan Shen should not be used or requires extra caution

Avoid

Active bleeding or hemorrhagic disorders. Dan Shen strongly promotes blood circulation and inhibits platelet aggregation, which can worsen bleeding.

Avoid

Concurrent use with warfarin or other anticoagulant/antiplatelet medications without medical supervision. Dan Shen has documented pharmacokinetic and pharmacodynamic interactions that can cause dangerous over-anticoagulation and bleeding complications.

Avoid

Pregnancy. Dan Shen is a Blood-moving herb that can stimulate uterine contractions and potentially cause miscarriage.

Caution

Patients without Blood stasis. Because Dan Shen is a potent Blood-activating herb, it should not be used long-term in people who do not have an underlying pattern of Blood stasis, as it may damage normal Blood and Qi.

Caution

Heavy menstrual bleeding (menorrhagia) without confirmed Blood stasis. Dan Shen's blood-moving properties could worsen excessive menstrual flow if the underlying cause is Qi deficiency failing to contain Blood rather than stasis.

Caution

Spleen and Stomach deficiency with poor digestion. Dan Shen is bitter and slightly cold, which may further burden a weak digestive system. Use with caution and combine with Spleen-supporting herbs if needed.

Classical Incompatibilities

Traditional Chinese pharmacological incompatibilities — herbs or substances to avoid combining with Dan Shen

Dan Shen is listed as incompatible with Li Lu (藜芦, Veratrum) in the classical Eighteen Incompatibilities (十八反). The relevant line of the traditional verse states: "诸参辛芍叛藜芦" (all the "Shen" herbs, Xi Xin, and Shao Yao are antagonistic to Li Lu). Dan Shen should not be combined with Li Lu in any formula. Modern research has shown that co-decoction of Li Lu with herbs in the "Shen" group can increase the dissolution of toxic veratrum alkaloids, raising the risk of poisoning.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Contraindicated in pregnancy. Dan Shen is a potent Blood-invigorating herb that promotes circulation and moves Blood stasis. These properties can stimulate uterine activity and risk inducing miscarriage or premature labour. Classical texts note that Dan Shen can "drop dead fetuses" (落死胎), underscoring its strong uterine-moving action. While it was historically used in specific pregnancy complications (such as threatened miscarriage with bleeding due to Blood stasis, as described in the Qian Jin Fang), such use requires expert clinical judgement and should not be attempted without specialist guidance. For routine use, it should be strictly avoided during pregnancy.

Breastfeeding

Caution is advised during breastfeeding. While Dan Shen is classified as non-toxic, its Blood-moving properties and active compounds (tanshinones, salvianolic acids) may transfer into breast milk. There is insufficient clinical data on its safety during lactation. Its antiplatelet and anticoagulant pharmacological effects are a theoretical concern for the nursing infant. It is best avoided unless specifically prescribed by a qualified practitioner who has assessed the clinical need.

Children

Dan Shen is not commonly used in paediatric practice. When indicated in children (such as for specific cardiovascular conditions under specialist care), dosage should be reduced proportionally based on age and body weight, typically to one-third to one-half of the adult dose. It should only be used in children under the guidance of a qualified practitioner, and generally avoided in young children unless clearly necessary.

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Dan Shen

Warfarin and other anticoagulants: This is the most well-documented and clinically significant interaction. Dan Shen increases warfarin absorption, raises its blood levels, prolongs its half-life, and exerts its own independent anticoagulant effects (platelet aggregation inhibition, antithrombin III-like activity, promotion of fibrinolysis). Multiple case reports have documented dangerous bleeding with INR levels exceeding 8.0 in patients combining Dan Shen with warfarin. Dan Shen should be strictly avoided with warfarin, heparin, and other anticoagulant drugs.

Antiplatelet drugs (aspirin, clopidogrel): Dan Shen independently inhibits platelet aggregation induced by ADP and epinephrine, likely through cAMP phosphodiesterase inhibition. Combined use with antiplatelet drugs may result in additive bleeding risk. Use with caution and under medical supervision.

Digoxin: Dan Shen has been reported to interfere with serum digoxin immunoassay measurements, potentially causing false readings. This can complicate therapeutic drug monitoring in patients taking cardiac glycosides.

CYP450 substrates: Tanshinones in Dan Shen have been shown to inhibit CYP enzymes (particularly warfarin hydroxylation) in animal studies. This mechanism may affect the metabolism of other drugs processed through the same hepatic pathways, though clinical significance for drugs other than warfarin is not yet well established.

Dietary Advice

Foods and dietary considerations when taking Dan Shen

Avoid excessive consumption of cold, raw foods while taking Dan Shen, as these can impede Blood circulation and counteract the herb's blood-moving effects. Avoid strong tea and coffee close to taking the herb, as tannins may bind to its active compounds. Classical texts note that Di Huang (Rehmannia) related herbs suggest avoiding radish (萝卜), garlic, and spring onions, though this applies more to related herbs than to Dan Shen specifically. Alcohol in small amounts may be acceptable and was even used as a medium in some classical Dan Shen preparations, but heavy alcohol consumption should be avoided due to additive effects on blood vessel dilation.

Botanical Description

Physical characteristics and morphology of the Dan Shen source plant

Salvia miltiorrhiza Bunge is a perennial herb in the mint family (Lamiaceae), typically growing 30 to 100 cm tall. The entire plant is covered with dense yellowish pubescence and glandular hairs. The stems are erect, square-shaped (four-angled), and branch toward the top. Leaves are opposite and odd-pinnate (divided into smaller leaflets), with ovate to broadly ovate leaflets that have toothed margins and are covered in fine white hairs on both surfaces.

Flowers appear from April through August in whorled clusters along terminal spikes. The corollas are purple-blue to lavender, about 2.5 cm long, emerging from a dark purple, bell-shaped calyx. After flowering, small black elliptical nutlets develop. The medicinal roots are thick, fleshy, long and cylindrical, covered in a distinctive reddish-brown to earthy red skin, with sparse branching rootlets. The plant grows naturally on mountain slopes, forest margins, grasslands, and stream banks at elevations of 120 to 1,300 metres, preferring well-drained soil and partial to full sun. It is cold-hardy to approximately -10°C but intolerant of waterlogging.

Sourcing & Harvesting

Where Dan Shen is sourced, when it's harvested or collected, and how to assess quality

Harvesting season

Spring and autumn. Roots are dug after the aerial parts begin to wither, typically from November through the following March, with early November considered optimal for highest active compound content.

Primary growing regions

Dan Shen is widely distributed across China. As a traditional dao di yao cai (terroir herb), it is classified under Sichuan (川药) regional herbs. Major production areas include Sichuan (especially Zhongjiang County, which holds Geographic Indication status for its high-quality Dan Shen with characteristically thick, short roots and high salvianolic acid B content), Shandong (Laiwu and Mengshan areas, known for large yields), Anhui, Shanxi, Hebei, and Jiangsu. Historically, the Shen Nong Ben Cao Jing and related texts recorded it growing in Tongbai Mountain and Mount Tai. Both wild and cultivated sources are used, though cultivated Dan Shen now dominates the market.

Quality indicators

Good quality Dan Shen roots are long, cylindrical, and slightly curved, 10-20 cm in length and 0.3-1 cm in diameter. The outer surface should be reddish-brown to dark brownish-red with visible longitudinal wrinkles. The cross-section should show a purplish-red colour with a small or absent woody core (the smaller the woody centre, the better the quality). The texture should be firm yet slightly brittle, snapping cleanly when broken rather than bending. It should have a mild aromatic smell and a slightly bitter taste. Zhongjiang (Sichuan) Dan Shen is particularly prized for being thick, short, and fleshy with high active compound content. Avoid roots that are overly woody, dark black on the cross-section (indicating improper drying with water washing), hollow, or excessively thin and fibrous.

Classical Texts

Key passages from the classical Chinese medical texts that describe Dan Shen and its therapeutic uses

Shen Nong Ben Cao Jing (《神农本草经》, Divine Farmer's Classic of Materia Medica)

Original: 味苦，微寒。主心腹邪气，肠鸣幽幽如走水，寒热积聚，破癥除瘕，止烦满，益气。一名却蝉草。生川谷。

Translation: Bitter in flavour, slightly cold. It treats pathogenic Qi in the Heart and abdomen, intestinal rumbling that sounds like flowing water, alternating cold and Heat with accumulations, breaks up fixed masses and removes mobile masses, relieves agitation and fullness, and supplements Qi. Also called Que Chan Cao ("cicada-repelling herb"). Grows in river valleys.

Ming Yi Bie Lu (《名医别录》, Supplementary Records of Famous Physicians)

Original: 养血，去心腹痼疾结气，腰脊强，脚痹，除风邪留热。久服利人。

Translation: Nourishes Blood, removes chronic Heart and abdominal illness with bound Qi, stiffness of the lumbar spine, leg impediment, and clears lingering Heat from Wind pathogen. Long-term use benefits people.

Ben Cao Gang Mu (《本草纲目》, Compendium of Materia Medica, Li Shizhen)

Original: 活血，通心包络，治疝痛。

Translation: Invigorates Blood, opens the Pericardium channel, treats hernia pain.

Classical saying widely attributed to the medical tradition

Original: 一味丹参散，功同四物汤。

Translation: "A single-ingredient Dan Shen powder has the same effect as Si Wu Tang (Four Substance Decoction)." This famous saying reflects the traditional high regard for Dan Shen's comprehensive ability to both invigorate and nourish the Blood, though many classical physicians noted that this is an overstatement and that Dan Shen and Si Wu Tang each have their own distinct clinical uses.

Historical Context

The history and evolution of Dan Shen's use in Chinese medicine over the centuries

Dan Shen has over 2,000 years of documented medical use. It was first recorded in the Shen Nong Ben Cao Jing, where it was classified as a "top-grade" (上品) herb, meaning it was considered non-toxic and suitable for long-term use. The name "Dan Shen" (丹参) literally means "red/cinnabar ginseng," reflecting the distinctive red colour of its roots. It was also known by alternative names including Chi Shen (赤参, "red ginseng"), Mu Yang Ru (木羊乳), and Que Chan Cao (却蝉草, "cicada-repelling herb").

In its earliest recorded use, Dan Shen was primarily indicated for abdominal complaints, intestinal rumbling, and accumulations. Over the centuries, its clinical applications expanded significantly. By the time of the Ming Yi Bie Lu (compiled around 500 CE), its Blood-nourishing and pain-relieving properties were formally documented. The Da Ming materia medica later added indications for regulating menstruation, calming the spirit, and treating skin conditions. Li Shizhen in the Ben Cao Gang Mu (1578) further emphasized its Blood-invigorating and Pericardium-opening properties. The famous aphorism "one ingredient Dan Shen has the same effect as Si Wu Tang" became widely known, though physicians like the author of the Yi Lin Zuan Yao cautioned that Dan Shen and Si Wu Tang each have distinct uses and should not be simply equated.

In modern times, Dan Shen became one of the most extensively researched Chinese herbs for cardiovascular disease. Compound Danshen Dripping Pills (复方丹参滴丸) became one of the first Chinese patent medicines to enter FDA clinical trials for investigation as a treatment for angina pectoris, representing a milestone in the international recognition of traditional Chinese medicinal herbs.

Modern Research

4 published studies investigating the pharmacological effects or clinical outcomes of Dan Shen

1

Review: Interaction between Warfarin and Danshen (Salvia miltiorrhiza) (2001)

Chan TYK. Interaction between warfarin and danshen (Salvia miltiorrhiza). Ann Pharmacother. 2001;35(4):501-504.

This review evaluated the potential for adverse interactions between Dan Shen and warfarin. It found that Dan Shen affects blood clotting through multiple mechanisms: inhibiting platelet aggregation, interfering with extrinsic coagulation, showing antithrombin III-like activity, and promoting clot breakdown. Animal studies showed Dan Shen increased warfarin blood levels and prolonged its effects. Three clinical case reports documented dangerous over-anticoagulation and bleeding when patients on warfarin also took Dan Shen. The review concluded Dan Shen should be avoided in patients taking warfarin.

PubMed
2

Case Report: Warfarin-Danshen Interaction Causing Profound Anticoagulation (1998)

Izzat MB, Yim AP, El-Zufari MH. A taste of Chinese medicine! Ann Thorac Surg. 1998;66(3):941-942.

A 62-year-old man with a mechanical heart valve replacement on stable warfarin therapy developed dangerous over-anticoagulation (INR rising from 3.0 to over 8.4) after taking Dan Shen. He developed massive bleeding requiring 6 units of fresh frozen plasma and 7 units of blood. After stopping Dan Shen and re-stabilising warfarin alone, the same 5mg dose maintained normal INR levels, confirming the interaction.

3

Review: Pharmacological Effects of Salvia miltiorrhiza (Danshen) on Cerebral Infarction (2010)

Zhou L, Zuo Z, Chow MSS. Danshen: an overview of its chemistry, pharmacology, pharmacokinetics, and clinical use. J Clin Pharmacol. 2005;45(12):1345-1359.

This review examined Dan Shen's effects on stroke prevention and treatment. The herb was found to work through multiple pathways relevant to cerebral infarction: reducing atherosclerosis progression, lowering blood pressure, inhibiting platelet aggregation, reducing inflammation, and scavenging free radicals. Its active compounds include lipid-soluble tanshinones (tanshinone I, tanshinone IIA, cryptotanshinone) and water-soluble salvianolic acids (danshensu, salvianolic acid B).

4

Review: Salvia miltiorrhiza: A Potential Red Light to the Development of Cardiovascular Diseases (2017)

Wang L, Ma R, Liu C, et al. Salvia miltiorrhiza: A Potential Red Light to the Development of Cardiovascular Diseases. Curr Pharm Des. 2017;23(7):1077-1097.

This comprehensive review summarised the evidence for Dan Shen's cardiovascular protective effects. Active compounds including lithospermic acid B, tanshinone IIA, and danshensu showed therapeutic promise for hypertension through regulating calcium channels, endothelial nitric oxide, matrix metalloproteinases, and ACE pathways. The review also discussed the herb's anti-atherosclerotic mechanisms and its use in multiple clinical formulations including Compound Danshen Dripping Pills and Danhong Injection.

PubMed

Research on individual TCM herbs is growing but still limited by Western clinical trial standards. These studies provide emerging evidence and should be considered alongside practitioner expertise.