There is neither Szechuan hyssop nor Huai hyssop in Gui Zhi Tang, which consists of Gui Zhi, Paeoniae Alba, Radix et Rhizoma Glycyrrhizae Praeparata, Ginger and Jujubes. Gui Zhi Tang has the effects of relieving the muscles and releasing the evil qi trapped on the surface of the muscles by sweating and other methods, and harmonizing the Ying and Wei (making the internal and external qi of the body smooth, each in its own way). In this formula, Gui Zhi is the kingpin, which can relieve the muscles and release Qi, warm the meridians, and help Yang to transform Qi; Paeonia lactiflora is the minister, which can benefit Yin, astringent Ying, astringent Yin and stopping sweating (astringent Yin, reducing sweating), and the dosage of Gui Zhi and Paeonia lactiflora are equal. Ginger is used as an adjuvant to help Gui Zhi disperses epidermal evils (evils on the surface of the muscles) and harmonizes the stomach to stop vomiting; jujube benefits qi and zhong (tonifying qi and harmonizing the spleen and stomach) and calms the mind. The combination of ginger and jujube has the effect of tonifying the spleen, harmonizing the stomach and regulating Ying and Wei. Roasted licorice harmonizes the herbs (harmonizes the medicinal properties of different herbs). Gui Zhi Tang can be used in the treatment of exterior wind-cold syndrome (a type of syndrome manifesting as fever, chills, sweating, weakness, etc.), which is characterized by malignant wind and fever, headache, sweating, rhinorrhea, dryness and vomiting, lack of thirst, pale red tongue, white moss, and slow or weak floating pulse. This formula is contraindicated for those who are allergic to this formula. This formula should be used under the guidance of a physician.