Chinese Taxillus Herb Classic Formulas

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Dispels wind-damp and alleviates painful obstruction - Sang Ji Sheng is a classic herb for chronic bi syndrome affecting the joints, tendons, low back, and knees, especially when pain is paired with weakness rather than robust excess.
Tonifies the Liver and Kidneys - unlike many dispersing wind-damp herbs, it nourishes the deeper deficiency that underlies chronic weakness of sinews and bones, making it especially useful for older or debilitated patients.
Strengthens sinews and bones - it is used for weak knees, low-back soreness, difficulty walking, and recovery states in which tendon-bone support is compromised.
Calms the fetus and stops restless pregnancy - classical and modern TCM use includes threatened miscarriage, fetal restlessness, and pregnancy low-back pain when deficiency rather than acute heat-toxin is the main pattern.

Du Huo Ji Sheng Tang (独活寄生汤) - the defining formula for chronic wind-cold-damp bi with Liver-Kidney deficiency, where Sang Ji Sheng helps nourish while obstruction is dispelled.
Shou Tai Wan (寿胎丸) - traditional fetus-calming formula logic in which Sang Ji Sheng is paired with Tu Si Zi, Xu Duan, and E Jiao for threatened miscarriage and restless fetus due to deficiency.
Tian Ma Gou Teng Yin (天麻钩藤饮) - later formula usage extends Sang Ji Sheng into hypertension-style patterns where Liver and Kidney deficiency coexists with rising Yang and internal wind.

TCM Wiki describes Sang Ji Sheng as bitter, sweet, and neutral, entering the Liver and Kidney channels, with actions of dispelling wind-damp, tonifying the Liver and Kidneys, strengthening sinews and bones, and calming the fetus.
American Dragon emphasizes that it is one of the gentlest and most deficiency-supportive wind-damp herbs, especially appropriate for chronic low-back and knee weakness, arthritis, and pregnancy support.
Traditional formula literature strongly anchors Sang Ji Sheng in chronic bi syndrome and fetus-calming use, which is why it appears in both Du Huo Ji Sheng Tang and Shou Tai Wan traditions.