Long Dan Xie Gan Tang: A Classical Chinese Liver Fire Formula
Long dan cao (Chinese gentian) gives this classical formula its name and its clearing action.
Long dan xie gan tang liver fire formula is one of classical Chinese medicine’s most direct prescriptions for excess heat. It is a concentrated, ten-herb prescription designed for when the Liver and Gallbladder are running too hot.
Wang Ang codified it as “Gentian Decoction to Drain the Liver” in Yi Fang Ji Jie (Analytic Collection of Medical Formulas, 1682), though its roots reach back through earlier classical texts. Today it ranks among the most widely used formulas in the Chinese herbal tradition, stocked by practitioners worldwide.
The name comes directly from its chief herb — long dan cao (Gentiana scabra or Gentiana manshurica), known in English as Chinese gentian. This intensely bitter, cold root is one of the strongest draining agents in the materia medica. It has a direct affinity for the Liver and Gallbladder channels. Xie gan translates literally as “draining the liver” — a name that leaves no ambiguity about what this formula is designed to do.
Long Dan Xie Gan Tang and the Liver in Spring
In the framework of Traditional Chinese Medicine, the Liver governs the smooth flow of qi throughout the body and is associated with the Wood element. Spring is Wood’s season — the time when Liver energy naturally rises. Here’s why that matters: TCM has long observed that Liver patterns intensify in spring, when the Liver’s natural expansive drive meets stagnation or accumulated heat. Excess Liver fire and damp-heat don’t arise randomly — they tend to surface under stress, from prolonged emotional tension, from alcohol or rich food, or from constitutional heat that has built over time.
Long dan xie gan tang addresses this directly. It doesn’t just suppress symptoms — its ten-herb composition reflects a sophisticated clinical logic. The formula clears fire from above and eliminates damp-heat from below, while also protecting the Liver yin and blood that the purging herbs might otherwise deplete. That internal compensation is what distinguishes a classical formula from a simple collection of cooling herbs.
The formula targets two distinct but overlapping TCM patterns: Liver fire rising — with symptoms moving upward toward the head and eyes, and damp-heat collecting in the lower reaches of the Liver and Gallbladder channels, particularly through the genital and urinary system. Both patterns share the same root: excess heat in the Liver and Gallbladder. For a gentler Liver formula that works on constraint rather than fire, see our guide to Jia Wei Xiao Yao San.
Long Dan Xie Gan Tang Liver Fire: Ingredients, Actions, and Indications
Long dan xie gan tang is a ten-herb formula structured around a hierarchy of chief, deputy, assistant, and envoy herbs.
The long dan xie gan tang liver fire formula works through a layered ten-herb structure in which each ingredient plays a specific, assigned role. Understanding the formula’s architecture makes it easier to understand why it works and when to use it.
Chief and Deputy Herbs
Long dan cao (Chinese gentian, Gentiana scabra) is the chief. It is bitter and cold, with a direct affinity for the Liver and Gallbladder channels. Its primary action is draining fire from the Liver and clearing damp-heat from the lower burner. Modern research has identified iridoid glycosides — particularly gentiopicroside — as key active constituents, with demonstrated anti-inflammatory and hepatoprotective activity in preclinical studies. The chief herb gives the formula its name and sets its direction.
Two deputies reinforce the chief. Huang qin (Baikal skullcap, Scutellaria baicalensis) clears heat and dries dampness with particular strength in the upper and middle burners; its flavonoid baicalin is well studied for its anti-inflammatory mechanisms. Zhi zi (gardenia fruit, Gardenia jasminoides) clears heat from the Triple Burner and channels damp-heat downward and out through urination.
The Elimination Pathway
The formula directs damp-heat out of the body via the urine.: Three diuretic herbs — ze xie (water plantain, Alisma orientalis), che qian zi (plantain seed, Plantago asiatica), and mu tong (clematis) — direct damp-heat out of the body via the urine. This lower exit route is what makes long dan xie gan tang specifically suited to damp-heat patterns with urinary involvement.
Chai hu (bupleurum root) plays a subtler but essential role. Chai hu guides the formula into the Liver and Gallbladder channels and relieves Liver qi constraint. Critically, it prevents the cold, heavy draining herbs from suppressing free qi movement. Without it, the formula would clear heat but risk creating stagnation in the process.
Two assistant herbs perform a protective function. Sheng di huang (fresh rehmannia root) nourishes Liver yin and cools the blood, moderating the formula’s cold and draining character. Dang gui (dong quai root) nourishes blood and protects the Liver’s underlying substance. A formula this aggressive in clearing excess must also preserve what it could deplete. Gan cao (licorice root) harmonizes the whole prescription and eases the stomach.
Traditional and Modern Indications
Traditionally, long dan xie gan tang is indicated for:
- Headache with a pressing, hot quality; dizziness and tinnitus with a rushing or fullness sensation
- Red, burning, or irritated eyes; hypersensitivity to light
- Hypochondriac pain or fullness along the flanks
- Bitter or sour taste in the mouth; dry throat
- Irritability, frustration, anger with a heat quality
- Short, dark, or burning urination
- Genital swelling, heat, itching, or discharge with a damp-heat quality
In contemporary TCM practice, practitioners have applied this formula to support conditions presenting with the appropriate pattern, including urinary tract infections with heat signs, acute herpes zoster (shingles), conjunctivitis and otitis media with Liver fire characteristics, acute hepatitis and cholecystitis presentations, and conditions involving skin heat or inflammation (for a simpler liver herb overview, see our dandelion root guide), and hypertension with a clear Liver fire pattern. The key word is pattern — long dan xie gan tang is not indicated for the same symptom arising from a cold or deficiency root.
How to Use Long Dan Xie Gan Tang Liver Fire Tincture
Each herb in the formula is individually extracted, then combined in the proportions of the original classical prescription.
Long dan xie gan tang liver fire formula is available as a liquid tincture — the most practical format for a multi-herb classical prescription. Herbal Clinic prepares each formula using the classic tincturing method. Herbs are individually extracted in pharmaceutical-grade alcohol at precisely controlled percentages, then combined in the proportions of the original formula.
The tincture contains all ten classical herbs: long dan cao, huang qin, zhi zi, chai hu, clematis root (substituted for traditional akebia due to aristolochic acid concerns in modern practice), che qian zi, ze xie, sheng di huang, dang gui, and gan cao. This is a complete, balanced preparation — the formula’s internal compensation between clearing and nourishing is preserved.
How Long to Use Long Dan Xie Gan Tang
In TCM clinical tradition, long dan xie gan tang practitioners use in short, targeted courses rather than as a long-term daily supplement. It is a purging formula — its cold, bitter character suits acute or subacute excess conditions, not to ongoing maintenance or support for deficiency patterns. Using it beyond the appropriate timeframe, or applying it to the wrong pattern, can weaken the Spleen and deplete qi and yang.
The key takeaway: this formula is for heat and excess. Someone who runs cold, fatigues easily, or has a weak digestion is not a candidate for this formula. A warming or toning prescription would be more appropriate. The right pattern is unmistakable when present: heat, irritability, redness or burning in the body, and a red tongue with a yellow coating.
In addition, long dan xie gan tang is traditionally contraindicated during pregnancy. Working with a qualified TCM practitioner or herbalist to confirm the pattern before starting is the appropriate approach — particularly for anything beyond short-term acute use.
However, for those familiar with TCM pattern assessment, this formula is a well-established, well-understood tool. Its clinical record spans centuries and its ingredient composition is transparent. Herbal Clinic’s version is produced in Toronto from verified-source herbs, with each batch assessed for quality and consistency before bottling. The tincture is available in 100mL, 250mL, 500mL, and 1000mL sizes.
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