Prepared Earthworm Classic Formulas … Natural Herb Library

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Clears heat and extinguishes internal wind ... Zhi Di Long is used for spasms, convulsions, heat-driven agitation, and channel obstruction when internal wind is stirred by replete heat.
Unblocks channels and collaterals ... it remains a classic animal medicine for hemiplegia, numbness, painful obstruction, facial paralysis, and post-stroke patterns in which movement is blocked.
Clears Lung heat and calms wheezing ... traditional use extends to asthma, difficult breathing, and stubborn wheeze when heat and obstruction bind the Lung.
Promotes urination and reduces swelling ... it can be added when edema or difficult urination accompanies heat and obstruction.

Bu Yang Huan Wu Tang (补阳还五汤) ... classic post-stroke formula in which Di Long helps reopen the channels and collaterals.
Di Long with Gou Teng, Jiang Can, and Quan Xie ... internal-wind strategy for spasms, tremors, and convulsions.
Di Long with Ma Huang and Xing Ren ... traditional wheezing combination for Lung heat with difficult breathing.

Traditional herbology preserves Di Long's reputation for treating heat, spasms, and channel obstruction and links its drilling, penetrating animal nature to its collateral-opening action.
Preparation is mainly about making the animal material cleaner, drier, and easier to use internally rather than redefining the core medicinal category.
PREPARATION NOTE: Zhi Di Long is the processed medicinal form of Pheretima and should not be confused with live or food-grade earthworm material.