1. Origin & Development
Qing Jin Hua Tan Tang (清金化痰汤), or Clear Metal and Transform Phlegm Decoction, is a classical formula recorded in Tong Zhi Fang and later cited in Za Bing Guang Yao. It belongs to the category of formulas that clear Lung Heat, transform Phlegm, and moisten dryness.
This formula addresses Phlegm-Heat congesting the Lungs (the Metal organ) with some injury to Lung fluids. Typical signs include cough with thick yellow phlegm that is difficult to expectorate and may be foul or streaked with blood, a dry painful throat, a flushed face, a sensation of heat in the nose, a yellow greasy tongue coating, and a soggy or slippery rapid pulse.
Combining Huang Qin and Zhi Zi to clear Lung Fire, Zhi Mu, Mai Men Dong, and Gua Lou Ren to nourish Yin, moisten dryness, and loosen Phlegm, Bei Mu, Ju Hong, and Jie Geng to transform Phlegm and disseminate Lung Qi, Sang Bai Pi to drain Heat and descend Lung Qi, Fu Ling to leach Dampness, and Gan Cao to harmonize and soothe the throat, Qing Jin Hua Tan Tang clears Heat from Metal, transforms sticky Phlegm, and protects Lung Yin more than purely drying Phlegm-Heat formulas.
2. Respiratory Diseases
Clinically, Qing Jin Hua Tan Tang is a highly popular choice for respiratory issues driven by "lung heat."
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Acute Bronchitis: For patients suffering from severe coughing, thick yellow mucus, fever, and heavy thirst, this formula quickly clears the heat and quiets the cough.
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Early-Stage Pneumonia: When a patient presents with a fever, hacking cough, and trapped phlegm, practitioners often use this formula as a base to control the condition and speed up the healing process.
3. Pulmonary Infections
When the lungs are fighting off bacterial or viral infections and showing clear signs of lung heat, this formula can be incredibly supportive. For instance, in cases of viral pneumonia where the patient has a cough, fever, and yellow phlegm, a TCM practitioner might diagnose it as a lung heat pattern. In these cases, Qing Jin Hua Tan Tang helps balance the body's internal environment, boosts natural resistance, and works alongside standard anti-infection treatments to help the patient bounce back faster.

4. Other Related Conditions
Because the lungs and throat are connected, this formula is also great for upper respiratory discomforts. If lung heat travels upward, it can cause a sore, red, swollen throat or a hoarse voice. By flushing the heat out of the lungs, Qing Jin Hua Tan Tang naturally cools and soothes the vocal cords and throat.