泻白散源于宋代医家钱乙所著的《小儿药证直决》，方由桑白皮、他骨皮、生甘草、粳米组成。其中以桑白皮为君，取其甘寒，能泻肺清热、止咳平喘；地骨皮为臣，取其质轻而性寒，轻以去实，寒以股热；以甘草、粳米为佐使。取名“泻白”，泻者清泻肺中伏热，白者肺之色，“泻白” Xiebaisan originated from the “Pediatric Drug Evidence Directive” written by Song Yi’s physician Qian B, and was composed of Sang Baipi, his bone skin, raw licorice and glutinous rice. Among them, Sangbaipi is taken as the king, which is taken from the cold, can evade the heat, cough and relieve asthma; the bone is the minister; it is light and cold, light to the real, cold to the heat; licorice, glutinous rice As to make. Named “Sweet White”, diarrhea clears the lungs and lungs, the color of the white lungs, “whiteness”