Shí Gāo (Gypsum)
💎- Primary Action Clears heat at the Qì level and drains Stomach fire.
- Secondary Action Clears Lung heat to stop wheezing and eases thirst.
- Character Sweet, Acrid, Extremely Cold. Acts on LU & ST.
Zhī Mǔ (Anemarrhena)
🌿- Primary Action Clears heat, drains fire, and nourishes Yīn.
- Secondary Action Moistens dryness and generates body fluids.
- Character Bitter, Sweet, Cold. Acts on LU, ST, KI.
Quenching the "Four Bigs"
In the Qì level stage of disease, heat is rampant but has not yet entered the blood. This pair is the gold standard for **Big Fever**, **Big Thirst**, **Big Sweat**, and a **Big (Flooding) Pulse**.
Dynamic Synergy: Shí Gāo provides the raw cooling power to extinguish fire, while Zhī Mǔ ensures that the cold energy doesn't dry out the body, simultaneously nourishing the Yīn that the fire has consumed.
Clear
Fire Extraction
Nourish
Fluid Retention
Clinical Intensity Comparison
Evaluating power vs. preservation.
Pharmacological & Kinetic Profile
Modern biomedical insights into the Qì-Level clearing mechanisms.
| Parameter | Shí Gāo (Gypsum) | Zhī Mǔ (Anemarrhena) |
|---|---|---|
| Key Components | Calcium Sulfate (CaSO4.2H2O) | Steroidal Saponins (Timosaponin), Flavonoids |
| Antipyretic Mechanism | Inhibits central thermoregulatory neurons; rapid temperature reduction. | Inhibits $Na^+/K^+-ATPase$ activity; prolonged heat-clearing effect. |
| Metabolism (PK) | Low oral solubility; requires long boiling. Excreted via kidneys. | Saponins hydrolyzed by gut microbiota to active sapogenins (Sarsasapogenin). |
| Biological Half-Life | Short acting; requires frequent dosing in acute "Big Fever" states. | Moderate; provides sustained cooling and fluid preservation. |
| Other Effects | Reduces vascular permeability; sedative effect on CNS. | Hypoglycemic, antibacterial, and anti-inflammatory properties. |
Formula Architecture
Classic applications of this cooling duo.
| Formula Name | Pair's Function | Main Use |
|---|---|---|
| Bái Hǔ Tāng (White Tiger Decoction) | Sovereign / Ministerial | The primary formula for Qì-Level heat and the "Four Bigs." |
| Yù Nǚ Jiàn | Clear Heat / Protect Yīn | Stomach fire with Yīn deficiency (toothaches, thirst). |
| Zhú Yè Shí Gāo Tāng | Clear Residual Heat | Lingering heat after a febrile illness with fluid damage. |