Dachaihu Decoction: a classic prescription for relieving Shaoyang, clearing the bowels and purging heat.

Dabuihu Decoction is one of the classic prescriptions of traditional Chinese medicine. It consists of Bupleurum, Scutellaria baicalensis, Pinellia ternata, ginger, jujube, Citrus aurantium, rhubarb and white peony root. It has the following functions:Reconciling Shaoyang and diarrhea heat knotsIt has dual functions and is mainly used to treat Shaoyang Yangming syndrome. This article will start from the prescription composition, efficacy mechanism, clinical application and precautions, and systematically analyze the key points of syndrome differentiation and practical value. The core content is as follows:Fang Yuan and compatibility characteristics(The monarch drug Bupleurum and the minister drug Rhubarb work synergistically),Indications analysis(Frequent cold and heat combined with constipation and abdominal pain),Modern application expansion(Cholecystitis, pancreatitis and other emergencies), and finally emphasizes syndrome differentiation taboos and flexibility of compatibility.

Essentials of prescription composition and compatibility

Dachaihu Decoction was born out of "Treatise on Febrile Diseases".Xiaochaihu TangOn the basis, Citrus aurantium, rhubarb, and white peony root are added to form a "Shaoyang Yangming double solution" pattern. Bupleurum (12g) is a monarch medicine, relieving stagnation and heat in Shaoyang; Scutellaria baicalensis (9g) clears fire in the liver and gallbladder, forming a medicinal pair with Bupleurum; rhubarb (6g) purges Yangming and fu-organ excess, and together with Citrus aurantium (9g) breaks Qi and eliminates accumulation, it is a ministerial medicine. Pinellia ternata and ginger harmonize the stomach and relieve vomiting, white peony relieves pain and relieves pain, and jujube harmonizes various medicines. All prescriptions are used together with cold and warm, and are used as both attack and supplement, embodying Zhang Zhongjing’s “The disease is in both Shaoyang and Yangming.” dialectical thinking.

Key points of syndrome differentiation and classic indications

Typical symptoms include:Fullness of pain in chest and flanks(Shaoyang syndrome),Vomiting doesn't stop(stomach qi ascending and reversing),Constipation or diarrhea(Yangming Fu Shi). "Jingui Synopsis" records that it can treat "fullness and pain in the heart", and is mostly used in modern times for acute abdominal diseases, such as acute cholecystitis with colic in the right hypochondrium, cholelithiasis with jaundice, pancreatitis with abdominal distension and refusal to press, etc. Research shows (see table below) that its improvement rate in cholestasis reaches 83%, and its combined use with Western medicine can shorten the course of the disease. Need to pay attentionDisabled for those who have experienced pyrexia, Pregnant women and those with physical weakness should use rhubarb with caution.

Modern applications and flexible tailoring

Contemporary doctors expand its application scope: ①metabolic diseases: For obese people with constipation, add pinellia and hawthorn; ②Emotional illness: To transform depression syndrome into fire, add gardenia and pachyrhizus; ③after surgery: For intestinal adhesions, remove rhubarb and add peach kernels. Deng Tietao, a master of traditional Chinese medicine, once used this prescription to combineYinchenhao SoupTreatment of severe cholangitis, emphasizing "Used to clear the fu organs"Principle. Japanese Kampo medicine adjusts the dosage to 1/3 of the original recipe for the treatment of chronic gastritis reflux symptoms, reflecting the "Fang Zheng corresponding"Flexible thinking.

Summary and usage warnings

Dachaihu Tang isShaoyang Yangming Double SolutionThe representative party, its value lies in "Solving the outside and clearing the inside” compound mechanism of action. Clinical application needs to be strictly controlled"Fluctuation of cold and heat + blockage of qi in the fu organs"The core of syndrome differentiation is to avoid misuse of pure deficiency syndrome or sun syndrome." Modern pharmacology has confirmed that it has multiple effects of anti-inflammatory, choleretic, and regulating gastrointestinal motility (see data table), but the dosage of rhubarb needs to be adjusted individually. As Hu Xishu said: "If there is evidence, then use the method”, the soul of prescription lies in precise diagnosis rather than mechanical application.

Quote sources:

1. Zhang Zhongjing's "Treatise on Febrile Diseases: Differentiation of Taiyang Disease Pulse Syndrome and Treatment"
2. Deng Tietao's "Traditional Chinese Medicine Clinicians Series"
3. "Chinese Journal of Traditional Chinese Medicine" 2021 Meta analysis data of Dabuihu Decoction