I. Prescription Source & History

1. Recorded in Classic Works

Ban Xia Hou Pu Tang, also called Pinelliae Rhizoma Praeparatum Decoction is from 'Treatise on Miscellaneous Diseases of Women' in 'Synopsis of the Golden Chamber' written by Zhang Zhongjing, a famous medical scientist in the late Eastern Han Dynasty. The original text is: 'For women with a feeling of a lump in the throat like roasted meat, treat with Pinelliae Rhizoma Praeparatum Decoction.' The symptom of a feeling of a lump in the throat like roasted meat described here vividly metaphorizes the foreign body sensation in the throat as if there is a roasted meat lump, and Pinelliae Rhizoma Praeparatum Decoction is an effective prescription for this disease.

2. Historical Inheritance & Development

Since it was recorded in 'Synopsis of the Golden Chamber', Pinelliae Rhizoma Praeparatum Decoction has gone through the practice and inheritance of doctors in multiple dynasties. In the process of later doctors using this prescription, its application scope and theoretical interpretation have been continuously enriched. For example, doctors in the Jin and Yuan dynasties further explored it and put forward some new opinions on the compatibility and dosage adjustment of drugs according to the clinical experience and medical theory at that time, making this prescription more perfect in treating diseases related to qi stagnation and phlegm coagulation. In the Ming and Qing dynasties, there were records and application cases of Pinelliae Rhizoma Praeparatum Decoction in many medical works, and its application in various clinical departments was also more extensive, gradually becoming one of the classic prescriptions for treating qi stagnation and phlegm coagulation syndrome in traditional Chinese medicine.

II. Introduction to Ingredients (Monarch, Minister, Assistant, Courier)

1. Monarch Herb - Pinellia

Pinelliae Rhizoma Praeparatum is pungent in flavor and warm in nature, and belongs to the spleen, stomach, and lung meridians. Its main effects are drying dampness and resolving phlegm, lowering adverse qi and stopping vomiting, dissipating masses and resolving stagnation. In Pinelliae Rhizoma Praeparatum Decoction, Pinelliae Rhizoma Praeparatum targets the pathogenesis, dries dampness and resolves phlegm, and is the key drug for treating the obstruction of phlegm and qi in the throat. The pungent and dispersing property of Pinelliae Rhizoma Praeparatum can open knots and resolve phlegm, and eliminate the coagulation of phlegm and qi stagnation in the throat. For example, when the transportation and transformation function of the spleen and stomach in the human body is abnormal, water and dampness accumulate to form phlegm, and the phlegm and qi reverse upward and stagnate in the throat, Pinelliae Rhizoma Praeparatum can relieve the foreign body sensation in the throat by its effects of drying dampness and resolving phlegm and lowering adverse qi, so that the phlegm is eliminated, the qi is smooth.

2. Minister Herb - Magnolia

Magnoliae Officinalis Cortex is bitter, pungent, and warm in nature, and belongs to the spleen, stomach, lung, and large intestine meridians. It has the effects of drying dampness and eliminating phlegm, lowering qi and relieving fullness. Magnoliae Officinalis Cortex assists Pinelliae Rhizoma Praeparatum in the prescription, enhancing the effects of drying dampness and resolving phlegm, lowering qi and relieving stuffiness. It can promote qi movement and relieve stagnation, so that when qi moves, phlegm will be eliminated. When qi stagnation and phlegm coagulation cause chest and epigastric stuffiness and discomfort in the throat, Magnoliae Officinalis Cortex can eliminate qi stagnation through its effect of lowering qi and relieving fullness, cooperate with Pinelliae Rhizoma Praeparatum, and strengthen the power of resolving phlegm and dissipating masses, thus improving the discomfort symptoms in the throat and chest and epigastrium.

3. Assistant Herb - Poria

Poria is sweet and light in flavor, neutral in nature, and belongs to the heart, lung, spleen, and kidney meridians. Its effects are promoting diuresis and percolating dampness, strengthening the spleen, and calming the heart. Poria acts as an assistant drug in Pinelliae Rhizoma Praeparatum Decoction, playing the role of strengthening the spleen and percolating dampness. Because the formation of phlegm is closely related to the transportation and transformation function of the spleen and stomach, Poria strengthening the spleen and percolating dampness can cut off the source of phlegm production and contribute to the elimination of phlegm-dampness. At the same time, Poria can also calm the heart and soothe the mind, and has a certain conditioning effect on symptoms such as emotional discomfort and restlessness caused by the obstruction of phlegm and qi, enabling the patient's mental state to be adjusted while the physical symptoms are improved.

4. Assistant Herb - Ginger

Zingiberis Rhizoma Recens is pungent in flavor, slightly warm in nature, and belongs to the lung, spleen, and stomach meridians. It has the effects of inducing sweating to dispel cold, warming the middle-jiao to stop vomiting, resolving phlegm and relieving cough, and detoxifying fish and crabs. Zingiberis Rhizoma Recens is also an assistant drug in the prescription. It can disperse and dissipate stagnation, and harmonize the stomach and stop vomiting. On the one hand, the pungent and dispersing effect of Zingiberis Rhizoma Recens helps to disperse the stagnated qi, cooperate with drugs such as Pinelliae Rhizoma Praeparatum and Magnoliae Officinalis Cortex, and enhance the effect of promoting qi movement and resolving phlegm; on the other hand, its effect of harmonizing the stomach and stopping vomiting can relieve symptoms such as nausea and vomiting caused by the reverse upward of phlegm and qi, and at the same time can harmonize all the drugs, making the medicinal properties of the whole prescription more mild.

5. Assistant Drug - Perilla Leaf

Perillae Folium is pungent in flavor, slightly warm in nature, and belongs to the lung and spleen meridians. It has the effects of inducing sweating to dispel cold, promoting qi movement and regulating the stomach. As a guiding drug, Perillae Folium can lead all the drugs upward to the throat, disperse exogenous pathogenic factors, regulate qi and relieve fullness. It can enhance the effect of the prescription in dispersing wind pathogens, regulating qi and resolving phlegm, enabling the drugs to better act on the throat area, relieve the discomfort symptoms in the throat, and at the same time can regulate qi movement, so that qi moves and phlegm is eliminated, and the normal function of the throat is restored.

III. Pathogenesis, Effects and Treatments

1. Pathogenesis Analysis

The pathogenesis targeted by Pinelliae Rhizoma Praeparatum Decoction is the obstruction of phlegm and qi. It is mostly due to emotional discomfort, stagnation of liver qi, qi stagnation leading to failure of fluid distribution, accumulation of fluid into phlegm, and the mutual binding of phlegm and qi in the throat, resulting in a foreign body obstruction sensation in the throat, that is, the so-called 'a feeling of a lump in the throat like roasted meat'. At the same time, qi stagnation and phlegm coagulation can also affect the transportation and transformation function of the spleen and stomach, presenting symptoms such as chest and epigastric stuffiness, nausea and vomiting.

2. Effects

This prescription has the effects of promoting qi circulation, dissipating stagnation, descending adverse qi and resolving phlegm. Through drugs such as Pinellia ternata and Magnolia officinalis, it dries dampness and resolves phlegm, reduces qi stagnation and relieves fullness. Poria cocos strengthens the spleen and promotes diuresis to cut off the source of phlegm production. Ginger harmonizes the stomach and stops vomiting, and disperses stagnation with its pungency. Perilla frutescens disperses exogenous pathogenic factors, regulates qi and soothes the middle jiao. With their combined effects, qi circulation is promoted, phlegm is eliminated, and stagnation is dissipated, thus achieving the purpose of treating diseases.

3. Treatable Diseases

Pinellia and Magnolia Decoction is mainly used to treat globus hystericus. The symptoms include a sensation of a lump in the throat, which cannot be expectorated or swallowed, fullness and oppression in the chest and diaphragm, accompanied by coughing or vomiting. The tongue coating is white and moist or white and slippery, and the pulse is string-like and slow or string-like and slippery. Clinically, in addition to the typical globus hystericus, if there are other similar symptoms caused by qi stagnation and phlegm coagulation, such as chronic pharyngitis, a foreign body sensation in the throat, gastrointestinal neurosis, etc., as long as the pathogenesis conforms to the obstruction of phlegm and qi, Pinellia and Magnolia Decoction can be used for treatment.

IV. Analysis of Formula Principles

1. Resolving Phlegm and Regulating Qi, Treating Both Symptoms and Root Causes

In this prescription, Pinellia ternata dries dampness and resolves phlegm, and Magnolia officinalis reduces qi stagnation and relieves fullness. The combination of the two regulates qi and resolves phlegm, targeting the main pathogenesis of the obstruction of phlegm and qi, which is a method for treating the symptoms. Poria cocos strengthens the spleen and promotes diuresis to cut off the source of phlegm production, which is a strategy for treating the root cause. Treating both the symptoms and the root cause can eliminate phlegm, promote qi circulation, and relieve the condition.

2. Drug Synergy, Enhancing Effects

The combination of Pinellia ternata and Magnolia officinalis enhances the power of drying dampness and resolving phlegm, and reducing qi stagnation and dissipating nodules. The combination of ginger and Perilla frutescens can not only disperse stagnant qi with its pungency, but also harmonize the stomach and stop vomiting. Acting synergistically with Pinellia ternata and Magnolia officinalis, it makes the promotion of qi circulation and elimination of phlegm smoother. The function of Poria cocos in strengthening the spleen and promoting diuresis cooperates with other drugs to jointly regulate the metabolism of qi, blood, body fluids in the human body, enhancing the overall therapeutic effect of the prescription.

3. Guiding Meridian, Reaching Sickness Site

As the guiding drug, Perilla frutescens can lead all the drugs to act on the throat, enabling the drugs to better act on the diseased site and exert their therapeutic effects. It can not only disperse exogenous pathogenic factors, but also regulate qi and soothe the middle jiao, which plays an important role in improving the qi stagnation and foreign body sensation in the throat, guiding the medicinal power of the whole prescription to concentrate on the throat to achieve the best therapeutic effect.

V. Comparison with Other Similar Formulas

1. Comparison with Chaihu Shugan Powder

Bupleurum Liver-Dispersing Powder Its main efficacy is to soothe the liver and regulate qi, and it mainly treats the syndrome of liver qi stagnation. Its drug composition mainly includes drugs for soothing the liver and regulating qi such as Bupleurum chinense, Fructus Aurantii, and Paeonia lactiflora. Compared with Pinellia and Magnolia Decoction, Bupleurum Liver-Dispersing Powder focuses on soothing the liver qi, with symptoms such as emotional depression and distending pain in the hypochondrium as the main manifestations; while Pinellia and Magnolia Decoction It focuses on promoting qi and resolving phlegm, characterized by symptoms such as a feeling of a foreign body in the throat and stuffiness and discomfort in the chest and epigastrium due to the obstruction of phlegm and qi. Although both are related to qi stagnation, their pathogenesis and main treated diseases are different.

2. Comparison with Erchen Decoction

Erchen Decoction It has the effects of drying dampness and resolving phlegm, regulating qi and harmonizing the middle-jiao, and is the basic formula for treating damp-phlegm syndrome. Its drug composition mainly includes Pinelliae Rhizoma, Citri Reticulatae Exocarpium, Poria, Glycyrrhizae Radix et Rhizoma, etc. Compared with Banxia Houpu Decoction Erchen Decoction mainly focuses on drying dampness and resolving phlegm, and is more focused on treating the syndrome of internal obstruction of phlegm-dampness in the spleen and stomach. Common symptoms include coughing with profuse phlegm, white and easy expectoration, and stuffiness in the chest diaphragm. On this basis, Banxia Houpu Decoction further emphasizes the pathogenesis of the mutual binding of qi stagnation and phlegm coagulation, highlighting the symptoms in the throat and stuffiness and discomfort in the chest and epigastrium, and has the effect of promoting qi and dissipating nodules.

VI. Clinical Application and Indications

1. Plum-Pit Qi

Plum-Pit Qi is the classic indication of Banxia Houpu Decoction. Patients feel as if there is something obstructing in the throat, which cannot be swallowed and cannot be spat out, often accompanied by emotional discomfort, fullness and distension in the chest and hypochondrium. By using Banxia Houpu Decoction to promote qi and dissipate nodules, and descending adverse qi and resolving phlegm, it can effectively relieve the foreign body sensation in the throat and improve the discomfort symptoms of patients.

2. Chronic Pharyngitis

Patients with chronic pharyngitis often have symptoms such as a foreign body sensation in the pharynx, dryness of the pharynx, and itching of the pharynx. Traditional Chinese medicine syndrome differentiation is mostly related to qi stagnation and phlegm coagulation. Banxia Houpu Decoction can regulate the qi mechanism of patients, resolve phlegm and dissipate nodules, relieve the discomfort in the pharynx, and has a certain therapeutic effect on the treatment of chronic pharyngitis.

3. Gastrointestinal Neurosis

Patients with gastrointestinal neurosis often present symptoms such as fullness, pain, nausea, and vomiting in the epigastrium, and at the same time may be accompanied by mental symptoms such as mood swings, anxiety, and depression. From the perspective of traditional Chinese medicine, it is mostly caused by emotional discomfort, qi stagnation and phlegm coagulation, blocking the qi mechanism of the gastrointestinal tract. Banxia Houpu Decoction can promote qi and resolve phlegm, regulate gastrointestinal function, relieve the symptoms of patients, and also has a certain improvement effect on the mental state.

VII. Additive and Subtractive Changes

1. Those with severe qi stagnation

Rhizoma Cyperi and Radix Curcumae can be added to enhance the power of promoting qi and relieving depression. Rhizoma Cyperi is pungent, slightly bitter, slightly sweet, with a neutral nature, and belongs to the liver, spleen, and triple energizer meridians. It has the effects of soothing the liver and relieving depression, regulating qi and relieving distension, and regulating menstruation and relieving pain. Radix Curcumae is pungent, bitter, and cold in nature, and belongs to the liver, heart, and lung meridians. It can promote blood circulation to relieve pain, promote qi and relieve depression, clear the heart and cool the blood, and promote bile secretion and remove jaundice. When the two are added to the prescription, qi stagnation can be dredged more effectively, and the effect of promoting qi and dissipating nodules of the prescription can be enhanced.

Those with more phlegm stagnation

Fructus Trichosanthis and Bulbus Fritillaria can be added to resolve phlegm and soften hardness. Fructus Trichosanthis is sweet, slightly bitter, and cold in nature, and belongs to the lung, stomach, and large intestine meridians. It can clear heat and resolve phlegm, widen the chest and dissipate nodules, moisten dryness and lubricate the intestines. Bulbus Fritillaria is sweet, bitter, and slightly cold in nature, and belongs to the lung and heart meridians. It has the effects of clearing heat and resolving phlegm, moistening the lung and relieving cough, and dissipating nodules and swelling. The addition of these drugs can further enhance the effect of resolving phlegm in the prescription and disperse phlegm coagulation.

3. Those with spleen deficiency

Rhizoma Atractylodis Macrocephalae and Radix Codonopsis can be added to strengthen the spleen and boost qi. Rhizoma Atractylodis Macrocephalae is sweet, bitter, and warm in nature, and belongs to the spleen and stomach meridians. It can strengthen the spleen and boost qi, dry dampness and promote diuresis, stop sweating, and prevent miscarriage. Radix Codonopsis is sweet and neutral in nature, and belongs to the spleen and lung meridians. It has the effects of strengthening the spleen and tonifying the lung, nourishing blood and promoting fluid production. Strengthening the spleen and stomach function helps to eliminate the source of phlegm production and better exert the therapeutic effect of the prescription.

VIII. Dosage (Traditional and Modern)

1. Traditional Methods

The traditional usage of Banxia Houpu Decoction is as follows: Pinelliae Rhizoma recens, one sheng; Magnoliae Officinalis Cortex, three liang; Poria, four liang; Zingiberis Rhizoma Recens, five liang; Perillae Folium, two liang. The above five flavors are decocted with seven sheng of water until four sheng is obtained, and taken warm in four doses, three doses during the day and one dose at night. In modern clinical applications, the dosage is generally adjusted according to the actual situation. Usually, Pinelliae Rhizoma recens, 12 g; Magnoliae Officinalis Cortex, 9 g; Poria, 12 g; Zingiberis Rhizoma Recens, 15 g; Perillae Folium, 6 g. Soak the drugs for about 30 minutes, then decoct with water for 20 - 30 minutes, and take the decoction.

2. Modern Concentrated Granules

Modern concentrated granules are granules made from traditional Chinese medicine through processes such as extraction and concentration, which are convenient to take. When using, just take them according to the dosage specified in the instructions. For example, for the concentrated granules of Banxia Houpu Decoction, generally take the granules equivalent to the dosage of the original medicinal materials each time, and take them with boiling water, 2 - 3 times a day. Its curative effect is basically the same as that of the traditional decoction, but it is more convenient for patients to take and carry.

IX. Precautions and Taboos

1. Dietary Taboos

During the period of taking Banxia Houpu Decoction, it is necessary to avoid eating stimulating foods such as raw and cold, greasy, and spicy foods. Raw and cold foods are likely to damage the yang qi of the spleen and stomach, affect the transportation and transformation function of the spleen and stomach, and are not conducive to the elimination of phlegm turbidity. Greasy foods are not easy to digest, which can increase the burden on the spleen and stomach and lead to the endogenous production of phlegm-dampness. Spicy foods are likely to help generate fire and produce phlegm, aggravating the condition.

2. Emotional Regulation

Since the diseases treated by this prescription are mostly related to emotional factors, patients should keep a happy mood during the medication period and avoid excessive emotional fluctuations, such as anxiety, depression, anger, etc. A good emotional state helps the smooth flow of qi and improves the therapeutic effect.

3. Special Populations

Pregnant women should use Banxia Houpu Decoction with caution. Because drugs such as Pinelliae Rhizoma recens in the prescription may have a certain impact on the fetus. In addition, those with weak constitutions should use it under the guidance of a doctor, and adjust the dosage and medication time according to individual conditions to avoid excessive medication from damaging healthy qi.

X. Modern Research Progress

1. Pharmacological Research

Banxia Houpu Decoction is a representative formula for treating plum pit qi and the mutual binding of phlegm and qi. It has the functions of resolving phlegm and dissipating nodules, descending adverse qi and resolving phlegm, promoting qi circulation and dissipating nodules, using pungent herbs to disperse nodules, and bitter herbs to descend adverse qi. It is applicable to the condition of a sensation of obstruction in the throat as if something is stuck, unable to swallow or spit out, accompanied by coughing or vomiting, fullness and oppression in the chest and hypochondrium, white and moist tongue coating, and taut and slippery pulse due to depression of the seven emotions and stagnation of liver qi. In the formula, Banxia, Houpu, Poria cocos strengthen the spleen and promote dampness percolation, and Shengjiang (fresh ginger) and others have the function of descending adverse qi and resolving phlegm. Clinically, it is used for chronic pharyngitis, chronic bronchitis, gastric neurosis, esophageal spasm, neurosis, etc. It is decocted in water for oral administration and has good curative effects on the syndrome of disorder of lung and stomach qi ascending and descending, dredging stagnant qi, and qi stagnation with phlegm obstruction.

Modern pharmacological studies have shown that Banxia in Banxia Houpu Decoction has effects such as relieving cough, resolving phlegm, and stopping vomiting; Houpu has effects such as antibacterial, anti-inflammatory, and antispasmodic; Poria cocos can enhance the body's immune function, promote diuresis, etc.; Shengjiang can promote the secretion of digestive juices, stop vomiting, etc.; Suye has antibacterial, anti-allergic and other effects. These herbs are combined with each other to jointly play the role of regulating the body's physiological functions and treating diseases.

2. Clinical Research

Multiple clinical studies have confirmed the effectiveness of Banxia Houpu Decoction in treating plum pit qi, chronic pharyngitis and other diseases. Through the observation of patients' symptoms, signs and related indicators, it is found that this formula can significantly improve the symptoms such as a foreign body sensation in the throat and stuffiness and discomfort in the chest and epigastrium of patients, and improve the quality of life of patients. At the same time, certain clinical curative effects have also been achieved in the treatment of gastrointestinal neurosis and other diseases, showing the important value of Banxia Houpu Decoction in modern clinical applications.

3. Dosage Form Improvement Research

With the development of modern pharmaceutical technology, the research on the dosage form improvement of Banxia Houpu Decoction is also continuously carried out. In addition to the modern concentrated granules mentioned above, there are also studies on making it into capsule dosage forms, tablet dosage forms, etc. While maintaining the curative effects of the formula, these new dosage forms further improve the stability and convenience of taking the medicine, providing more choices for clinical applications.