Shao Yao Gan Cao Tang
Within this formula, Bai Shao (Radix Alba Paeoniae) nourishes the blood and enriches yin, emolliates the liver and stops pain. Mixfried Gan Cao (Radix Glycyrrhizae) supplements the qi. Together, these two medicinals harmonize the liver and spleen and nourish the sinews. This formula is typically added to other formulas when there is spasm of the sinews and/or abdominal pain. This formula comes from Zhang Zhong-jings late Han dynasty Shan Han Lun (Treatise on Damage [Due to] Cold).