About This Formula
Traditional Chinese Medicine background and properties
Formula Description
A classical formula designed to clear heat from the lungs, dissolve phlegm, nourish Yin fluids, and stop coughing. It is commonly used for persistent cough with thick phlegm, especially when lung heat has begun to dry out the body's natural moisture. The formula gently cools the lungs while supporting the fluids that keep them moist and functioning well.
Formula Category
Main Actions
- Clears Lung Heat
- Moistens the Lungs
- Resolves Phlegm
- Stops Cough
- Descends Lung Qi and Stops Cough
- Nourishes Lung Yin
TCM Patterns
In TCM, symptoms don't appear randomly — they cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Qing Fei Tang is traditionally associated with these specific patterns.
The following describes this formula's classification within Traditional Chinese Medicine theory and is provided for educational purposes only.
Why Qing Fei Tang addresses this pattern
When heat lodges in the lungs, it 'cooks' the body's normal fluids into thick, sticky phlegm. This phlegm clogs the airways and disrupts the Lung's natural function of sending Qi downward, resulting in coughing, wheezing, and difficulty expectorating. Qing Fei Tang addresses this directly: Huang Qin and Shan Zhi clear the heat driving phlegm production, Bei Mu and Jie Geng transform and expel the phlegm that has already formed, while Xing Ren and Sang Bai Pi restore the Lung's descending function. Fu Ling and Chen Pi address the Spleen to prevent new phlegm from being generated. Because prolonged heat inevitably damages Yin fluids, the formula includes Tian Men Dong and Mai Men Dong to replenish what has been lost, preventing the condition from progressing to Yin deficiency.
A practitioner would look for one or more of these signs
Persistent cough that worsens with heat exposure or at night
Thick, yellow, sticky phlegm that is difficult to expectorate
Wheezing or labored breathing due to phlegm obstruction
Dry or sore throat from heat damaging fluids
Thirst or dry mouth
Feeling of fullness or tightness in the chest
Why Qing Fei Tang addresses this pattern
When lung heat persists over time, it progressively dries out the Yin fluids that keep the lungs moist and supple. The result is a dry, hacking cough with scanty or no phlegm, dry throat, and a hoarse voice. Qing Fei Tang addresses this through its Yin-nourishing herbs: Tian Men Dong enriches Kidney Yin (the deep source), Mai Men Dong nourishes Lung Yin directly, and Dang Gui supplements Blood to support fluid production. Wu Wei Zi astringes leaking Lung Qi to prevent further fluid loss. Meanwhile, the heat-clearing herbs (Huang Qin, Shan Zhi) remove the pathogenic factor that caused the Yin damage in the first place, allowing the nourishing herbs to take full effect.
A practitioner would look for one or more of these signs
Dry cough with little or no phlegm
Persistent dryness and irritation in the throat
Hoarseness or weak voice
Night sweats or afternoon heat sensation
Dry mouth with desire to sip fluids
How It Addresses the Root Cause
Qing Fei Tang addresses a pattern where Heat has accumulated in the Lungs, scorching the fluids and generating thick, sticky Phlegm that is difficult to expectorate. This creates a vicious cycle: Lung Heat "cooks" the body's normal fluids into Phlegm, while the Phlegm itself obstructs Lung Qi, impairing its natural downward-descending movement. When Lung Qi cannot descend properly, it rebels upward, producing cough, wheezing, and a sensation of fullness in the chest.
Over time, the persistent Heat begins to consume the Lungs' Yin (the cooling, moistening aspect of the organ). As Yin is depleted, the Lungs lose their ability to self-moisten, leading to dry throat, thirst, and a hoarse voice. The Heat may also affect the Blood level, as the Lungs govern the circulation of Qi and are closely connected to the Blood. This is why Dang Gui (Chinese Angelica) is included in the formula, to nourish and harmonize the Blood, recognizing that chronic Lung Heat often quietly damages Blood as well.
The overall disease logic is one of Heat excess combined with emerging Yin deficiency: the patient has both an active pathogen (Phlegm-Heat) and growing constitutional weakness (Yin depletion). Qing Fei Tang is designed to address both sides simultaneously, clearing the Heat and Phlegm while replenishing the Yin fluids the Heat has already consumed, thus breaking the cycle at multiple points.
Formula Properties
Cool
Predominantly bitter and sweet, with secondary pungent and sour notes. Bitter to clear Heat and descend Qi, sweet to nourish Yin and harmonize, pungent to open the Lungs and disperse Phlegm, sour to astringe Lung Qi and prevent further leakage of fluids.
Formula Origin
This is just partial information on the formula's TCM properties. More detailed information is available on the formula's dedicated page
