Abstract:Suzi Jiangqitang is one of the classical formulas in the Catalogue of Ancient Classical Formulas (the second batch)—Han Medicine. The research method of philology was employed to systematically review the ancient documents and modern medical reports of Suzi Jiangqitang. The key information of this formula, including origin, composition, compatibility, original plants, processing method, dosage, preparation method, usage, and indications, was summarized to provide literature and data support for the development and clinical application of this formula. Suzi Jiangqitang is originally known as Zusuzi Tang, which is derived from Important Prescriptions Worth a Thousand Gold for Emergency. This formula is composed of Perillae Fructus, Pinelliae Rhizoma, Peucedani Radix, Magnoliae Officinalis Cortex, Glycyrrhizae Radix et Rhizoma, Angelicae Sinensis Radix, Citri Reticulatae Pericarpium, Perillae Folium, Jujubae Fructus, Zingiberis Rhizoma Recens, and Cinnamomi Cortex. The original plants of other herbal medicines except Peucedani Radix follow those in the 2020 edition of Pharmacopoeia of the People's Republic of China. Raw materials of Angelicae Sinensis Radix, Peucedani Radix, Cinnamomi Cortex, Citri Reticulatae Pericarpium, Perillae Folium, and Jujubae Fructus are used in this formula. Perillae Fructus, Pinelliae Rhizoma, Glycyrrhizae Radix et Rhizoma, and Magnoliae Officinalis Cortex in this formula are stir-fried, processed with alumen, stir-fried, and processed with ginger, respectively, and the fresh material of Zingiberis Rhizoma Recens is used in this formula. The recommended formula is composed of 15 g Perillae Fructus, 15 g Pinelliae Rhizoma, 6 g Angelicae Sinensis Radix, 6 g Glycyrrhizae Radix et Rhizoma, 6 g Peucedani Radix, 6 g Magnoliae Officinalis Cortex, 9 g Cinnamomi Cortex, and 9 g Citri Reticulatae Pericarpium. On the basis of the recommended dosage, other herbal medicines are crushed and mixed with five pieces of Perillae Folium, one jujube, and two ginger pieces. The mixture should be decocted in 450 mL water to reach a volume of 240 mL. After removal of the residue, the decoction should be taken warm with no time limitation. In ancient times, Suzi Jiangqitang was most commonly used to treat dermatophytosis, dyspnea with cough, red eyes, blood syndrome, globus hysteriocus, and headache. In modern times, it is commonly used for treating respiratory diseases, especially chronic obstructive pulmonary disease and dyspnea with cough. In addition, this formula is used to treat circulatory and digestive diseases, such as pulmonary heart disease, constipation, and vomiting. It is also used to treat globus hysteriocus and blood syndrome. Although the range of indications is wide, the diseases treated by Suzi Jiangqitang are generally caused by excess in the upper, deficiency in the lower, and failure of Qi to ascend or descend.