The proprietary Chinese medicine for Da Chaihu Tang is called Da Chaihu Granules. Da Chaihu Granules is composed of Chaihu, Scutellaria baicalensis, Paeonia lactiflora, Pinellia ternata, Citrus aurantium, Rhubarb, Ginger and Jujubes, which has the effect of detoxifying the Shao-Yang (treating externally-induced heat illnesses in which the evil is between the half-expression and half-inside) and internally diarrhealizing the heat knot. The formula emphasizes the use of Chai Hu to relieve the evil of Shaoyang. Scutellaria baicalensis is used to clear away the heat of Shaoyang, and rhubarb and Citrus aurantium are used to remove heat from the bowels and move Qi to break the knot. Paeonia lactiflora and rhubarb can cure solid pain in the abdomen, and Citrus aurantium can remove fullness of pain under the heart; Semixia harmonizes the stomach and reduces rebelliousness (harmonizes the stomach qi and makes the upward rebellious qi to descend); and a large amount of ginger is used to increase the effect of stopping vomiting and to relieve the poison of Semixia. Da Chaihu Granules is mainly used for Shaoyang-Yangming Syndrome, which manifests as cold and heat, bitter fullness in chest and hypochondrium (feeling fullness and discomfort in front and sides of chest), vomiting, depression and slight annoyance, hardness of plumpness under the heart (mainly referring to the distension of the stomach and discomfort), or urgent pain under the heart, and unresolved stools, etc. The adverse reactions and contraindications of this drug are still unknown. The adverse effects and contraindications of this drug are not clear. It is recommended to use it under the guidance of a professional physician, not blindly self-medication.