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The first paragraph: content summary and structure

Dingchuan Decoction is a classic prescription of traditional Chinese medicine, mainly used to clear the lungs and relieve asthma, clear away heat and resolve phlegm. This article will start from four aspects: composition, efficacy, applicable symptoms, and modern applications. The core content focuses on prescription analysis (ephedra and almond are the main drugs) and clinical verification (the effective rate for asthma is about 78%), while the secondary content involves historical origins ("Health Prescriptions" was first published in the Ming Dynasty) and precautions (people with yin deficiency should use with caution). Through layered narrative, it helps readers systematically understand the scientific value of this traditional prescription.

Paragraph 2: Prescription composition and core functions

The basic formula of Dingchuan Decoction contains 9 medicinal materials:

Medicinal materials	Dosage	function
Ephedra	9g	Xuanfei and asthma
Almonds	9g	Lower Qi and relieve cough
skullcap	6g	Clear heat and dry dampness
Mulberry white bark	9g	Relieving lungs and relieving asthma

Modern pharmacological research shows that this prescription can improve airway hyperresponsiveness by inhibiting IL-4 inflammatory factors (data from "Chinese Journal of Experimental Prescriptions" 2016). Typical application scenarios include acute exacerbations of bronchial asthma, chronic bronchitis and other respiratory diseases.

Paragraph 3: Applicable symptoms and compatibility characteristics

This party applies toPhlegm-heat blocking lung typeAsthma syndrome is characterized by: coughing and shortness of breath, yellow and sticky phlegm, red tongue and yellow coating. Different from Xiaoqinglong Decoction (which treats cold asthma), Dingchuan Decoction emphasizes the compatibility idea of ​​"combination of Xuan and Qing Dynasties". Wang Ang, a famous doctor in the Qing Dynasty, specifically pointed out in the "Collection of Medical Prescriptions": "This recipe uses scutellaria baicalensis, mulberry bark and ephedra together to clear away heat without hindering hair growth." It is clinically recommended to take 3-5 doses continuously to observe the effect. After the symptoms are relieved, the medication regimen needs to be adjusted.

Paragraph 4: Modern Research and Notes

Clinical observation by Beijing University of Chinese Medicine in 2020 shows that the total effective rate of Dingchuan Decoction combined with Western medicine in treating asthma is 12.5% higher than that of the Western medicine group alone (sample size n=160). But please note:

Taboo groups	risk performance
Yin deficiency cough	May worsen dry mouth
Hypertensive patients	Ephedrine causes blood pressure fluctuations

It is recommended to avoid spicy food while taking the medicine. Modern preparations are available in granular form (included in the 2020 edition of the Chinese Pharmacopoeia), which is convenient for patients to use.

Paragraph 5: Summary and historical origins

As a representative prescription for asthma and cough due to phlegm-heat, Dingchuan Decoction embodies the treatment principle of "treating the symptoms when it is urgent" in traditional Chinese medicine. Its formulation logic has been confirmed by modern research to have anti-inflammatory and bronchodilator effects ("New Traditional Chinese Medicine and Clinical Pharmacology" 2018 paper). When Gong Tingxian of the Ming Dynasty first recorded it, he emphasized that "San'ao Decoction is the base, plus heat-clearing and phlegm-resolving drugs". This classic compatibility idea still guides clinical practice to this day. Treatment should be based on syndrome differentiation when used, and it is recommended to be applied under the guidance of a practicing Chinese medicine practitioner.

Sources of citation: 1. "Multiple Prescriptions for Preserving Health" (Ming Dynasty Gong Tingxian) 2. "Chinese Pharmacopoeia" 2020 Edition 3. Clinical Observation Report of Beijing University of Chinese Medicine (2020) 4. Wang Ang's "Collection of Medical Prescriptions" engraved edition in the 21st year of Emperor Kangxi's reign in the Qing Dynasty