Herb Fruit (果 guǒ / 果实 guǒ shí)

Lian Qiao

Forsythia fruit · 连翘

Forsythia suspensa (Thunb.) Vahl · Fructus Forsythiae

Also known as: Forsythiae Fructus, Weeping forsythia fruit, Golden bells,

Lian Qiao (Forsythia fruit) plant

Images shown are for educational purposes only

Forsythia fruit is one of the most commonly used herbs for fighting infections and fevers in Chinese medicine. It is especially valued for treating sore throats, swollen glands, and the early stages of colds and flu caused by heat. Classical doctors called it the "holy medicine for sores" due to its powerful ability to reduce swelling and clear infections.

Category Heat-clearing herbs Herbs that clear Heat and resolve Toxicity (清热解毒药)
Therapeutic focus Immune Support Sore Throat Relief Skin Health Lymphatic Health

TCM Properties

Temperature

Slightly Cool

Taste

Bitter (苦 kǔ)

Channels entered

Lungs, Heart, Small Intestine

Parts used

Fruit (果 guǒ / 果实 guǒ shí)

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What This Herb Does

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

Therapeutic focus

In practical terms, Lian Qiao is primarily used to support these areas of health:

Immune Support Sore Throat Relief Skin Health Lymphatic Health

TCM Actions

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

Clears Heat and Resolves Toxicity Disperses Swelling and Dissipates Nodules Disperses Wind-Heat Clears Heart Fire Promotes Urination

How these actions work

'Clears Heat and resolves toxins' means Lián Qiào has a cooling nature that helps the body fight off infections driven by heat and inflammation. In Chinese medicine, infectious fevers, inflamed sore throats, and skin infections are understood as 'Heat toxins.' Lián Qiào's bitter, slightly cold properties directly counter these. This is why it appears in so many formulas for the early stages of colds, flu, and febrile diseases.

'Disperses swelling and dissipates nodules' refers to its ability to reduce inflammatory lumps and swollen glands. Classical texts call it the 'holy medicine for sores' (疮家圣药 chuāng jiā shèng yào) because it is so effective at resolving abscesses, boils, and swollen lymph nodes (known as scrofula or luǒ lì in TCM). The bitter taste helps it break through areas of stagnation where Heat and toxins have accumulated.

'Disperses Wind-Heat' means it helps the body release fever and surface symptoms caused by Wind-Heat pathogens, the TCM way of understanding acute febrile illness. Lián Qiào is light in nature and tends to float upward, making it particularly effective at addressing symptoms in the upper body: headache, sore throat, fever, and thirst at the onset of illness.

'Clears Heart Fire' refers to its specific affinity for the Heart channel. When high fever leads to agitation, restlessness, or even delirium, this reflects Heat invading the Heart in TCM terms. The seed of the fruit (Lián Qiào Xīn) is considered especially strong for this action. This is why it appears in formulas like Qīng Gōng Tāng for treating high fever with mental disturbance.

Patterns Addressed

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

Why Lian Qiao addresses this pattern

Lián Qiào is bitter and slightly cold, entering the Lung channel. Wind-Heat invades the body through the nose and mouth, first affecting the Lungs and the body's exterior defence. Lián Qiào's light, upward-floating nature allows it to reach the upper body and exterior, where it disperses Wind-Heat and clears toxic Heat from the Lung system. Its aromatic quality also helps it vent pathogenic factors outward through the skin. This makes it one of the primary herbs for the earliest stage of Wind-Heat invasion.

A practitioner would look for one or more of these signs

Fever

Fever with mild aversion to wind and cold

Sore Throat

Red, swollen, painful throat

Headaches

Headache from external Heat

Thirst

Thirst with desire to drink

Hypochondrial Pain That Is Worse On Coughing And Breathing

Cough from Lung Heat

Commonly Used For

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

Arises from: Wind-Heat

TCM Interpretation

In TCM, the common cold caused by Wind-Heat is understood as an invasion of warm pathogenic factors through the nose and mouth, first affecting the Lungs and the body's surface defences. Unlike a Wind-Cold type cold (which starts with strong chills and no sweating), a Wind-Heat cold presents with more prominent fever, sore throat, thirst, and yellow nasal discharge. The Lung's function of circulating defensive Qi on the body's surface is disrupted, and Heat begins to accumulate in the upper body.

Why Lian Qiao Helps

Lián Qiào is slightly cold and bitter, directly counteracting the Heat component of a Wind-Heat cold. Its light, upward-floating nature means it naturally reaches the upper body where cold symptoms concentrate (throat, head, nose). It disperses Wind-Heat from the Lung's exterior, clears toxic Heat that causes sore throat, and vents the pathogen outward. In Yín Qiào Sǎn, it serves as co-King alongside Jīn Yín Huā, and together they form the backbone of the most widely used formula for this type of cold.

Also commonly used for

Influenza

Early-stage febrile illness with Heat signs

Pharyngitis

Acute sore throat from Heat

Lumps

Epidemic parotitis with facial swelling

Skin Abscess

Boils, carbuncles, and abscesses before rupture

Mastitis

Acute breast inflammation

Erysipelas

Red, hot skin inflammation

Urinary Tract Infection

Heat-type urinary difficulty with burning pain

Viral Conjunctivitis

Acute red, inflamed eyes from Wind-Heat

Acne

Inflammatory acne from Heat toxins

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

Lungs Heart Small Intestine

Parts Used

Fruit (果 guǒ / 果实 guǒ shí)

Dosage & Preparation

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

Standard dosage

6-15g

Maximum dosage

Up to 30g in acute febrile conditions or severe toxic Heat, under practitioner supervision.

Dosage notes

Use lower doses (6-9g) for mild wind-Heat exterior patterns or as a supporting herb. Use standard doses (9-15g) for Heat-toxin conditions such as sores, abscesses, and febrile illness. Higher doses (15-30g) may be used for severe toxic Heat or acute infections. When the specific goal is to clear Heart Heat, the seeds (Lian Qiao Xin) may be used separately at 3-6g. Qing Qiao (unripe fruit) is generally preferred for its stronger clearing action and higher active compound content. Zhang Xichun noted that at a full liang (approximately 30g), Lian Qiao produces a gentle, sustained diaphoretic effect.

Preparation

No special decoction handling required. Lian Qiao is added with the main group of herbs and decocted normally. The fruit shells are typically crushed or broken open before decocting to improve extraction. When using Lian Qiao Xin (seeds) specifically for clearing Heart Heat, the seeds may be wrapped in cloth (包煎) to prevent them from dispersing in the decoction.

Processing Methods

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

Processing method

The seeds are separated from the fruit capsule, typically by steaming the unripe green fruit (Qīng Qiào) and then sieving out the seeds.

How it changes properties

The seed retains the bitter, slightly cold nature but has a more focused affinity for the Heart channel. Its ability to clear Heart Fire and calm the spirit is considered stronger than the fruit capsule, while the fruit shell's surface-dispersing action is reduced.

When to use this form

When high fever has led to Heat entering the Heart envelope (Pericardium), causing agitation, restlessness, or delirium. Commonly used in formulas like Qīng Gōng Tāng. Also preferred when the goal is specifically to drain Heart Fire rather than disperse surface Wind-Heat.

Common Herb Pairs

These ingredients are traditionally combined with Lian Qiao for enhanced therapeutic effect

Jin Yin Hua
Jin Yin Hua 1:1 (equal doses, typically 9-15g each)

The most famous herb pair in Chinese medicine for clearing Heat and resolving toxins. Jīn Yín Huā is sweet and cold, clearing Heat from both the Qi and Blood levels, while Lián Qiào is bitter and slightly cold, excelling at dispersing surface Heat and dissipating nodules. Together they reinforce each other's Heat-clearing and detoxifying power while covering a broader range: Jīn Yín Huā contributes mild outward-venting action and Blood-level cooling, while Lián Qiào adds stronger nodule-dispersing and Heart-clearing effects.

When to use: Any condition involving Heat toxins: early-stage febrile illness (Wind-Heat colds, flu), sore throat, skin infections, boils, and abscesses. This pair forms the core of Yín Qiào Sǎn.

Niu Bang Zi
Niu Bang Zi 1:1 (typically 6-10g each)

Niú Bàng Zǐ (arctium seed) is acrid, bitter, and cold, excelling at dispersing Wind-Heat and benefiting the throat by venting Heat outward and downward. Lián Qiào disperses Wind-Heat upward and clears toxic Heat. Together, they provide powerful relief for the throat and upper respiratory tract, combining Niú Bàng Zǐ's throat-soothing descending action with Lián Qiào's upward-dispersing detoxifying action.

When to use: Wind-Heat colds with prominent sore throat and swollen tonsils. Also used for early-stage measles when the rash is slow to emerge.

Xia Ku Cao
Xia Ku Cao 1:1 to 1:2 (Lián Qiào 10g : Xià Kū Cǎo 10-15g)

Xià Kū Cǎo is bitter, acrid, and cold, entering the Liver and Gallbladder channels, and is the primary herb for clearing Liver Fire and dissipating nodules. Lián Qiào clears Heart Fire and also dissipates nodules. Together, they address the Phlegm-Fire pathomechanism behind swollen lymph nodes and thyroid nodules from two angles: Xià Kū Cǎo from the Liver side, Lián Qiào from the Heart side, creating a broad-spectrum nodule-dissolving combination.

When to use: Scrofula (cervical lymphadenopathy), thyroid nodules, and other Phlegm-Fire accumulations presenting as firm lumps along the neck.

Xuan Shen
Xuan Shen 1:1 (typically 10-15g each)

Xuán Shēn is bitter, sweet, salty, and cold, nourishing Yin while clearing Heat and resolving toxins. It enters the Lung, Stomach, and Kidney channels. Lián Qiào clears Heat and disperses nodules but does not nourish Yin. Together, they clear toxic Heat while protecting Yin fluids from being damaged by the Heat, and both contribute to dissipating nodules. The salty taste of Xuán Shēn softens hardness, complementing Lián Qiào's dispersing action.

When to use: Swollen lymph nodes and scrofula, especially when there are signs of Yin depletion (dry throat, low-grade fever). Also used in febrile disease when Heat has injured fluids.

Key Formulas

These well-known formulas feature Lian Qiao in a prominent role

Yin Qiao San 銀翹散 King

The definitive formula for Wind-Heat invasion and the onset of warm febrile diseases. Lián Qiào serves as co-King alongside Jīn Yín Huā at equal doses (30g in the original), showcasing its core action of dispersing Wind-Heat and clearing toxic Heat from the upper body. This is the formula most practitioners immediately associate with Lián Qiào.

Pu Ji Xiao Du Yin 普濟消毒飲 Deputy

Li Dongyuan's formula for 'great head plague' (epidemic parotitis), where Wind-Heat toxic pathogens cause severe facial swelling. Lián Qiào serves as Deputy, working alongside Niú Bàng Zǐ, Bò He, and Jiāng Cán to disperse Wind-Heat from the head and face, supporting the Kings (Huáng Qín and Huáng Lián) which directly clear the toxic Heat.

Qing Ying Tang 清營湯 Assistant

Wú Jū Tōng's formula for Heat that has penetrated into the nutritive (yíng) level. Lián Qiào plays the crucial Assistant role of 'penetrating Heat and redirecting it outward to the Qi level' (透热转气). This formula showcases a unique aspect of Lián Qiào: even though it is primarily a surface-level and upper-body herb, its light dispersing quality can reach into the nutritive level and push trapped Heat back outward.

Comparable Ingredients

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

Jin Yin Hua
Lian Qiao vs Jin Yin Hua

Both Lián Qiào and Jīn Yín Huā clear Heat and resolve toxins and are frequently used together. The key difference: Jīn Yín Huā is sweet, can cool the Blood level, and also treats bloody dysentery. Lián Qiào is more bitter, has stronger ability to dissipate nodules and clear Heart Fire, and is better at dispersing surface Wind-Heat. For sores with prominent swelling and lumps, Lián Qiào is preferred; for Heat toxins with bleeding or Blood-level Heat, Jīn Yín Huā is more appropriate.

Pu Gong Ying
Lian Qiao vs Pu Gong Ying

Both clear Heat and resolve toxins for sores and abscesses. Pú Gōng Yīng (dandelion) is bitter, sweet, and cold, entering the Liver and Stomach channels, and is especially strong for breast abscesses (mastitis) and Liver-Stomach Heat. Lián Qiào enters the Heart and Lung channels, excels at clearing upper body Heat and dispersing nodules, and has the additional ability to disperse Wind-Heat at the body's surface. For breast abscess, Pú Gōng Yīng is the primary choice; for febrile illness with surface symptoms, Lián Qiào is preferred.

Ban Lan Gen
Lian Qiao vs Ban Lan Gen

Both clear Heat and resolve toxins and are used in epidemic febrile diseases. Bǎn Lán Gēn (isatis root) is bitter and cold, entering the Heart and Stomach channels, and is especially strong at cooling the Blood and treating throat conditions (sore throat, mumps). Lián Qiào has broader surface-releasing action and better nodule-dispersing ability. For epidemic diseases focused on the throat and Blood-level Heat, Bǎn Lán Gēn may be preferred; for febrile illness with prominent exterior symptoms and swellings, Lián Qiào is more suitable.

Common Substitutes & Adulterants

Related species and common adulterations to be aware of when sourcing Lian Qiao

The most important historical confusion involves Lian Qiao from different botanical sources. Before the Song dynasty, a Hypericum species (possibly Hypericum ascyron or related plants, sometimes called 'small Lian Qiao') was also used under the same name. Today, the official pharmacopoeial source is strictly Forsythia suspensa (Thunb.) Vahl. Potential adulterants include fruits of other Forsythia species such as Forsythia viridissima, which have different phytochemical profiles (particularly lower forsythiaside A content). Qing Qiao and Lao Qiao should not be interchanged carelessly, as Qing Qiao contains higher levels of forsythiaside A, forsythoside C, cornoside, and rutin, while Lao Qiao has different proportions of active compounds.

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

Toxicity Classification

Classical Chinese pharmacopoeia toxicity rating for Lian Qiao

Non-toxic

Lian Qiao is classified as non-toxic in both the classical literature and the Chinese Pharmacopoeia. The Ming Yi Bie Lu explicitly states it is 'non-toxic' (无毒). Modern pharmacological reviews have found no significant toxicity reports for the whole fruit at standard dosages. Among its isolated compounds, forsythiaside A has shown only slight cytotoxicity and pseudoallergic reactions at excessively high experimental doses, which are not clinically relevant at therapeutic use levels. No special processing is required to render the herb safe.

Contraindications

Situations where Lian Qiao should not be used or requires extra caution

Caution

Spleen and Stomach deficiency-cold (脾胃虚寒). Lian Qiao is bitter and cool in nature, which can further damage a weak, cold digestive system, potentially worsening loose stools, poor appetite, or abdominal discomfort.

Caution

Qi deficiency with sores that produce thin, watery pus (气虚疮疡脓清). Lian Qiao's cold, clearing nature is inappropriate when the body lacks the Qi needed to properly resolve sores. This situation calls for tonifying herbs instead.

Caution

Yin deficiency with Heat signs. The classical text Ben Cao Jing Shu warns that when high fever arises from underlying deficiency rather than excess, Lian Qiao should not be used, as it clears Heat without nourishing the depleted Yin.

Caution

Prolonged or excessive use in the absence of Heat patterns. The Ben Cao Tong Xuan cautions that long-term use may produce internal cold (寒中), as the herb's cooling nature can gradually chill the middle burner.

Caution

Abscess or sores that have already ruptured and are draining well. The Ben Cao Jing Shu states that once an abscess has ulcerated, Lian Qiao should not be used, as its clearing and dispersing action is no longer appropriate.

Special Populations

Important considerations for pregnancy, breastfeeding, and pediatric use

Pregnancy

Generally considered safe at standard doses during pregnancy, as Lian Qiao is not traditionally classified among herbs that are contraindicated or cautioned in pregnancy. It does not have known uterine-stimulating or Blood-moving properties. However, because it is bitter and cool in nature, prolonged or high-dose use could theoretically weaken Spleen Qi, so use during pregnancy should be limited to genuine Heat conditions and kept to standard dosages under practitioner guidance.

Breastfeeding

No specific contraindication for breastfeeding has been documented in classical or modern sources. Lian Qiao is traditionally used to treat breast abscess (乳痈), suggesting it has a long history of use in lactating women for that indication. However, as a bitter, cool herb, extended use may affect digestion or reduce appetite, and the infant may be sensitive to changes in breast milk composition. Use should be limited to indicated Heat conditions and standard dosages.

Children

Lian Qiao has a long history of use in paediatric formulas, including the classical Lian Qiao Yin from the Lei Zheng Huo Ren Shu for treating childhood fevers. Dosage should be reduced proportionally based on the child's age and weight, typically one-third to one-half of the adult dose for children under 6, and two-thirds for children aged 6-12. The herb is bitter in taste, so compliance may be improved by combining with palatable herbs or sweetening slightly with honey (in children over 1 year).

Drug Interactions

If you are taking pharmaceutical medications, be aware of these potential interactions with Lian Qiao

No well-documented serious drug interactions have been established for Lian Qiao in clinical studies. Based on its known pharmacological properties:

  • Cardiac glycosides (digoxin): The fruit peel contains oleanolic acid, which has mild cardiotonic and diuretic effects. Theoretically, concurrent use with cardiac glycosides should be monitored, though the clinical significance at standard herbal doses is uncertain.
  • Antihypertensive medications: Forsythia suspensa water extract has demonstrated mild blood-pressure-lowering effects in pharmacological studies. Patients on antihypertensive drugs should be monitored for additive hypotensive effects.
  • Anticoagulant/antiplatelet agents: Some in vitro studies suggest mild effects on blood circulation. Clinical significance is unclear, but caution is reasonable for patients on warfarin or similar agents.

Overall, the interaction risk is low at standard therapeutic doses. Patients on multiple medications should inform their healthcare provider.

Dietary Advice

Foods and dietary considerations when taking Lian Qiao

While taking Lian Qiao for Heat conditions, avoid greasy, fried, spicy, and strongly warming foods (such as lamb, chilli, and alcohol), as these may counteract the herb's Heat-clearing effect. Cold, raw foods are acceptable when there is genuine Heat. If the herb is being used for exterior Wind-Heat, light, easily digestible meals are recommended to support recovery.

Botanical Description

Physical characteristics and morphology of the Lian Qiao source plant

Forsythia suspensa (Thunb.) Vahl is a deciduous shrub in the olive family (Oleaceae), commonly called weeping forsythia. It typically grows 2 to 3 metres tall, with slender, arching or pendulous branches that are brownish or pale yellowish-brown in colour and often hollow between nodes. The leaves are usually simple (occasionally three-lobed), ovate to elliptic in shape, with serrated margins, deep green above and paler beneath.

In early spring (March to April), before or just as the leaves emerge, clusters of bright golden-yellow, four-petalled, bell-shaped flowers appear in the leaf axils, creating a striking display. The fruit is an ovoid to elliptic capsule, 1.5 to 2.5 cm long, that matures between July and September. Each capsule is composed of two valves that split open when ripe, revealing winged seeds inside. The plant thrives on sunny hillsides, in thickets, and along forest margins across central and northern China, tolerating poor soils, drought, and considerable cold.

Sourcing & Harvesting

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

Harvesting season

Early autumn (September) for Qing Qiao (unripe green fruit, steamed then sun-dried); mid-autumn (October) for Lao Qiao (fully ripe yellow fruit, sun-dried directly).

Primary growing regions

The classical terroir (道地药材) region for Lian Qiao is southeastern Shanxi Province, particularly the area historically known as Zezhou (泽州, modern-day Jincheng). The Taihang, Taiyue, and Zhongtiao mountain ranges of Shanxi are considered to produce the highest quality herb. Major production also comes from Henan (notably Lushi County, which holds Geographic Indication Protection for its Lian Qiao), Shaanxi, Shandong, and Hubei. Shanxi province is recognized as a 'Top 10 Shanxi Herb' (十大晋药) for Lian Qiao.

Quality indicators

Two commercial grades exist: Qing Qiao (青翘, unripe) and Lao Qiao (老翘, ripe). Good quality Qing Qiao is greenish in colour, intact (not split open), without excessive stems or debris. Good quality Lao Qiao is yellow, with thick shell walls, large valves, and minimal seeds remaining inside. Both should be clean, free of mould, and have a faintly aromatic smell. The taste should be distinctly bitter. Cross-section of the fruit wall should be firm, not papery or hollow. Seeds (Lian Qiao Xin, 连翘心) should be fragrant when crushed. Avoid batches that are dark, damp, heavily fragmented, or mixed with excessive branch material.

Classical Texts

Key passages from the classical Chinese medical texts that describe Lian Qiao and its therapeutic uses

Shen Nong Ben Cao Jing (《神农本草经》)

Original: 连翘，味苦，平。主寒热，鼠瘘，瘰疬，痈肿，恶疮，瘿瘤，结热，蛊毒。一名异翘，一名兰华，一名轵，一名三廉。生山谷。

Translation: Lian Qiao is bitter in flavour and neutral in nature. It treats alternating cold and Heat, scrofula, lymphatic nodules, abscesses and swellings, malignant sores, goitre, knotted Heat, and gu-toxin. Also named Yi Qiao, Lan Hua, Zhi, and San Lian. It grows in mountain valleys.

Ben Cao Gang Mu (《本草纲目》, Li Shizhen)

Original: 连翘状如人心，两片合成，其中有仁甚香，乃少阴心经、厥阴包络气分主药也。诸痛痒疮疡皆心火，故为十二经疮家圣药。

Translation: Lian Qiao is shaped like a human heart, formed of two halves joined together, with a very fragrant kernel inside. It is the principal herb for the Qi aspect of the Heart (Shao Yin) and Pericardium (Jue Yin) channels. Since all painful, itchy sores and ulcers arise from Heart Fire, it is the 'Holy Medicine for Sores' of all twelve channels.

Zhen Zhu Nang (《珍珠囊》)

Original: 连翘之用有三：泻心经客热，一也；去上焦诸热，二也；为疮疡须用，三也。

Translation: Lian Qiao has three uses: first, it drains visiting Heat from the Heart channel; second, it clears all Heat from the upper burner; third, it is essential for treating sores and ulcers.

Ming Yi Bie Lu (《名医别录》)

Original: 无毒。去白虫。生太山。八月采，阴干。

Translation: Non-toxic. It expels white worms. It grows on Mount Tai. Harvested in the eighth month and dried in the shade.

Historical Context

The history and evolution of Lian Qiao's use in Chinese medicine over the centuries

Lian Qiao was first recorded in the Shen Nong Ben Cao Jing (ca. Han dynasty), where it was classified as a 'lower-grade' herb. The name "连翘" first appears in the Er Ya, China's oldest dictionary, as "连，异翘" (Lian, Yi Qiao). Its many aliases, including Yi Qiao, Lan Hua, Zhe Gen, Zhi, and San Lian, reflect its widespread use across different regions of ancient China.

Importantly, the early herb identified as Lian Qiao was likely a different plant from the modern source. Before the Song dynasty, Lian Qiao was used as a whole above-ground herb (stems, flowers, and fruit) and may have been a Hypericum species. The Tang dynasty Xin Xiu Ben Cao first distinguished between 'large Lian Qiao' (大翘) and 'small Lian Qiao' (小翘). By the Song dynasty, the Oleaceae species Forsythia suspensa became dominant, particularly from the Zezhou region. Li Shizhen's Ben Cao Gang Mu (Ming dynasty) cemented this identification, describing the fruit as "shaped like a human heart, two halves joined together, with a very fragrant kernel." He also famously designated it the "Holy Medicine for Sores" (疮家圣药), a title it retains today.

The herb gained particular prominence during the Wen Bing (Warm Disease) school of the Qing dynasty. Wu Jutong included it as a key ingredient in Yin Qiao San, one of the most widely used formulas for early-stage febrile illness. Zhang Xichun, in his Yi Xue Zhong Zhong Can Xi Lu (early 20th century), praised Lian Qiao as having a gentle diaphoretic action, recounting how a single large dose (one liang) cured a young patient's wind-warmth overnight with mild, sustained sweating.

Modern Research

4 published studies investigating the pharmacological effects or clinical outcomes of Lian Qiao

1

Comprehensive review: Phytochemistry, pharmacology, quality control and future research of Forsythia suspensa (2018)

Wang Z, Xia Q, Liu X, Liu W, Huang W, Mei X, Luo J, Shan M, Lin R, Zou D, Ma Z. Journal of Ethnopharmacology, 2018, 210: 318-339.

This review systematically summarized over 230 compounds isolated from Forsythia suspensa and its pharmacological activities. The review found that lignans and phenylethanoid glycosides (such as forsythiaside A and phillyrin) are the characteristic active constituents. Pharmacological effects included anti-inflammatory, antioxidant, antibacterial, antiviral, anticancer, and anti-allergy activities. No significant toxicity was reported for the whole fruit.

PubMed
2

Review: Pharmacological and pharmacokinetic properties of Forsythiaside A (2021)

Gong L, Wang C, Zhou H, Ma C, Zhang Y, Peng C, Li Y. Pharmacological Research, 2021, 169: 105690.

This review summarized evidence that forsythiaside A, the principal active compound in Lian Qiao, demonstrates significant anti-inflammatory, antiviral, neuroprotective, antioxidant, hepatoprotective, and antibacterial activities through regulation of multiple signaling pathways including NF-kB and Nrf2/HO-1.

PubMed
3

Review: Forsythiasides - A review of the pharmacological effects (2022)

Zhou L, Tong Y, Wang L, et al. Frontiers in Cardiovascular Medicine, 2022, 9: 971491.

This review described the pharmacological profiles of forsythiasides A through K, the phenylethanol glycosides in Forsythia suspensa. Key findings included cardiovascular protection, anti-inflammatory, antioxidant, and neuroprotective effects. The mechanistic pathways primarily involve TLR4/MyD88/NF-kB and Nrf2/HO-1 signaling.

PubMed
4

Meta-analysis: Efficacy of Forsythia suspensa on mouse and rat models of inflammation-related diseases (2024)

Zhou Y, Tong Y, et al. Frontiers in Pharmacology, 2024, 15: 1288584.

This meta-analysis of 11 animal studies (2000-2023) evaluated the anti-inflammatory efficacy of Forsythia suspensa fruit extracts. The results showed that the herb significantly reduced serum levels of pro-inflammatory cytokines (TNF-alpha, IL-6, IL-1beta), liver enzymes (ALT, AST), and reactive oxygen species, while improving antioxidant enzyme levels in inflammation models.

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.