Tiger's Bone Classic Formulas … Natural Herb Library

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Historically dispelled wind and alleviated pain ... Hu Gu was classically used for severe wind-damp pain, joint weakness, and chronic obstruction affecting the bones and sinews.
Historically strengthened bones and supported deep deficiency ... older records describe it for weakness of the low back, knees, and skeletal framework.
Historically relieved convulsion and contracture ... some traditional indication lists include tremor, spasm, or limb contracture.

Historical Hu Gu Jiu and related medicated-wine traditions ... used for wind-damp pain and skeletal weakness.
Old bone-and-sinew strengthening powders or pills ... a legacy lane rather than a viable modern practice.
Historical animal-medicine pain formulas ... now relevant mainly as context for substitution and conservation discussion.

Traditional herbology described Hu Gu as pungent and warm, entering the Liver and Kidney to dispel wind, stop pain, strengthen bones, and relieve convulsion.
Modern conservation law and endangered-species protection override the historical use record.