What Gui Zhi Tang is for
Gui Zhi Tang is for skin that sweats when it should be closed and still feels cold. It is clammy or moist, sensitive to wind, and breaks out in hives with sweating rather than from heat. The surface is out of step rather than under attack, and the formula's work is to restore the relationship between the defensive and nutritive levels so the skin can regulate itself again.
The skin is moist and cool, sometimes clammy, and it reacts to a draught. Hives come with sweating and wind sensitivity, and the lesions are pale or lightly pink rather than deep red. The surface looks open when it should be closed: sweat appears without heat, and the skin feels exposed even in a warm room. Between outbreaks it may simply feel damp and unsettled. This is the picture of a surface that has lost its timing rather than one that is inflamed.
Gui Zhi warms and releases the surface and regulates the Wei Qi. Bai Shao nourishes the Ying and astringes, and the two are given in equal measure: one releases, one holds, and the balance between them is the treatment. Sheng Jiang, Da Zao and Gan Cao harmonise the middle, because it is the middle that generates the Qi regulating the skin. The formula does not force a sweat; it restores the regulation that lets the surface close and open at the right times.
It suits clammy or moist skin with wind sensitivity, and chronic urticaria that arrives with sweating. It is not for exterior excess without sweating, where a stronger releasing formula is used, and not for Wind-Heat with a sore throat or for Damp-Heat. Taken warm and followed by rice porridge, as the classical instructions describe, the aim is a light even warmth rather than a strong sweat.
Actions
- Releases the exterior gently
- Harmonises the Ying and Wei levels
- Warms and regulates the surface
- Supports the middle
Properties
- Taste and temperature: Predominantly pungent and sweet. Pungent releases and warms the surface, sweet nourishes and harmonises the middle.
- Organs: Lungs, Spleen, Heart
- Channels: Lung, Spleen, Heart
The pattern behind it
The pattern is a surface that is out of balance: the Wei and Ying levels are no longer working together, so the surface is open when it should be closed and the person sweats while still feeling cold and wind-sensitive. The formula restores that relationship rather than simply warming or cooling.
Composition
The herbs in Gui Zhi Tang, with their role and dose.
| Role | Herb | Dose | Properties | Why it is there |
|---|---|---|---|---|
| Deputy | Gui Zhi | 9 g | Warm, Pungent, sweet | Warms and releases the surface, regulating the Wei Qi and restoring the flow. |
| Bai Shao | 9 g | Slightly cold, Bitter, sour | Nourishes Ying and astringes, balancing Gui Zhi's releasing action. | |
| Sheng Jiang | 9 g | Slightly warm, Pungent | Warms the middle and helps release the surface, working with Gui Zhi. | |
| Envoy | Da Zao | 4 to 6 dates | Warm, Sweet | Nourishes the middle and supports the Ying level. |
| Assistant | Gan Cao | 6 g | Neutral, Sweet | Harmonises the formula and supports the middle, which is essential to the Ying-Wei balance. |
Patterns it treats
Wind-Cold
Clammy or moist skin that reacts to wind and breaks out in pale hives with sweating, rather than in deep red lesions with heat. The surface is open when it should be closed. The formula restores the Ying and Wei relationship so the skin regulates itself.
How the formula is built
The formula is a balance of opposites: Gui Zhi releases and warms, Bai Shao astringes and nourishes, and the two are given in equal measure. Sheng Jiang, Da Zao and Gan Cao harmonise the middle, because the middle is what generates the Qi that regulates the surface. It is a formula for restoring regulation rather than for forcing a change.
Skin conditions it is used for
Where this formula appears in the skin conditions of the library.
Preparation and use
Decocted in water and taken warm, followed by a little warm rice porridge, as the classical instructions describe.
Modifications
- If the neck stiffness dominates, a formula with more surface release is used.
- If the sweating is marked, the astringing side is adjusted.
- If Heat appears, cooling herbs are added.
- If the person is depleted, the tonic side is increased.
Timing
Taken warm, followed by warm rice porridge, and covered to encourage a light sweat, as the classical instructions describe.
Duration
Acute use: one to three days for exterior Wind-Cold, with reassessment after each dose and stopping once symptoms resolve.
Diet while taking it
Warm light food and warm fluids; avoid cold and greasy food during the acute stage.
Safety
Contraindications
Avoid in exterior pattern without sweating and a tight pulse, where a stronger releasing formula is needed. Avoid in Wind-Heat with a sore throat and yellow tongue coat. Use care in Damp-Heat and in Yin deficiency with Heat.
Interactions
Gui Zhi may add to anticoagulant effects. Gan Cao can interact with diuretics, digoxin and corticosteroids.
Pregnancy
Generally considered compatible with pregnancy when appropriately prescribed, with a long classical precedent, though professional guidance is appropriate.
Breastfeeding
Considered acceptable under professional guidance.
Children
Frequently used in children with reduced dose for early colds with sweating.
Before you use it
Recorded from the classical record and rewritten in this project's own words. Educational only: not a prescription, and a febrile illness with a rash needs medical assessment.
General safety references
General references for herbal hepatotoxicity and herb-drug interactions; they are not specific to this formula.
- Review article: Herbal hepatotoxicity - an update on traditional Chinese medicine preparations. Alimentary Pharmacology & Therapeutics, 2014. PMID: 24844799.
- Interactions between herbal medicines and prescribed drugs: an updated systematic review. Drugs, 2009. PMID: 19719333.
- Warfarin and food, herbal or dietary supplement interactions: a systematic review. British Journal of Clinical Pharmacology, 2021. PMID: 32478963.
Origin and history
Shang Han Lun (伤寒论, Treatise on Cold Damage) by Zhang Zhongjing, Eastern Han dynasty, around 220 CE.
Gui Zhi Tang is the first formula of the Treatise on Cold Damage, and it has probably generated more commentary than any other in the tradition. Its method of harmonising the Ying and Wei levels rather than attacking the pathogen became a model for a whole family of formulas, from the surface-regulating to the middle-harmonising.
Classical record
The Treatise on Cold Damage opens with the formula for Wind-Cold with aversion to wind, sweating and a floating moderate pulse, to be taken warm followed by rice porridge to support a gentle sweat.
Shang Han Lun (伤寒论, Treatise on Cold Damage), Zhang Zhongjing, Eastern Han dynasty.
Evidence note
No controlled trial of this treatment in skin conditions was identified for this entry. What is described here rests on the classical and later materia medica record and on traditional clinical use, not on controlled trial evidence, and it is not a prediction of benefit. Where skin-specific research does exist it is linked above.
Common questions
Why is it used when there is already sweating?
Because the problem is that the surface is open and out of step, not closed. The formula restores regulation rather than forcing a sweat.
How is it different from Ma Huang Tang?
Ma Huang Tang is for Wind-Cold without sweating and a tight pulse. Gui Zhi Tang is for the pattern with sweating and a moderate pulse.
Can it help chronic hives?
Where the hives come with sweating and wind sensitivity rather than heat. Other patterns need other formulas.
Why rice porridge afterwards?
The classical instruction is to take warm rice porridge to support the middle and encourage a light, gentle sweat rather than a strong one.