Coastal Glehnia Root Classic Formulas … Natural Herb Library

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Nourishes Lung yin and moistens dryness ... Bei Sha Shen is classically used for dry cough, throat irritation, scanty sputum, hoarseness, and lingering dryness after warm disease.
Nourishes Stomach yin and generates fluids ... it is chosen for thirst, dry mouth, hunger without appetite, and fluid depletion after febrile disease or chronic heat damage.
Clears residual heat from the Lung and Stomach without being harsh ... it is especially useful when deficiency and dryness coexist rather than full excess heat.

Sha Shen Mai Dong Tang ... classic Lung-Stomach dryness formula in which Sha Shen restores fluids and moistens the upper burner.
Yi Wei Tang ... Stomach-yin formula that often uses Sha Shen with Mai Men Dong, Sheng Di Huang, and Yu Zhu for thirst and dry mouth after heat damage.
Yi Guan Jian ... Liver-Stomach yin deficiency formula in which Sha Shen is often paired with Sheng Di Huang and Mai Men Dong to soften dryness and restore fluids.

Traditional teaching treats Bei Sha Shen as the cooler, denser Sha Shen lane and keeps it separate from Nan Sha Shen even when both nourish dryness.
Its niche is dryness with depletion ... especially when the Lung and Stomach are both affected.