Dang Gui Si Reverse Pill should be Dang Gui Si Reverse Tang. This product has the effect of warming the meridians and dispersing cold (warming the meridians of the human body and removing cold from the body), nourishing the blood and opening the veins, and can be used to treat blood deficiency and cold syncope. The main ingredients of this product are Angelica sinensis, cinnamon sticks and licorice. Dang Gui Si Yi Tang is a traditional Chinese medicine formula composed of Angelica sinensis, cinnamon sticks, licorice, peony, fine herbs, Tong Cao, jujube, etc. In the formula, Angelica sinensis has the efficacy of nourishing the blood and nourishing the blood, cinnamon sticks have the efficacy of warming the menstruation and dispersing the cold and warming the blood, fine herbs have the efficacy of warming the menstruation and dispersing the cold, cinnamon sticks have the efficacy of warming and warming the blood, and jujube, licorice have the efficacy of benefitting the qi and strengthening the spleen (regulating the qi of the spleen and the stomach) and nourishing the blood. The whole formula together has the effect of warming menstruation, dispersing cold, nourishing Blood and promoting circulation. Angelica Si-Yi Tang can be used to treat the syndrome of blood deficiency and cold syncope, which is characterized by syncopal cold in the hands and feet, or pain in the waist, femur, leg, foot, shoulder and arm, no thirst in the mouth, pale tongue, white moss, and a fine or thin pulse. The adverse effects, contraindications and precautions of Angelica Sibiru Tang are not clear at present. If there is a need for medication, the drug should be used under the guidance of a Chinese medicine practitioner to identify the evidence, and should not be used blindly on its own, so as not to cause adverse effects on the body.