Clam Shell is the Shell of Meretrix meretrix Linnaeus or Cyclina sinensis Gmelin (Fma. Veneridae).

Action: To remove heat and resolve phlegm, to soften hard masses and eliminate nodulations, and to alleviate epigastric pain by inhibiting acid secretion.

Indications: Cough, chest pain and bloody sputum caused by heat in the lung,; scrofula, goitre; epigastric pain associated with acid regurgitation; external use for eczema and scalds.

Usage: To be decocted before other ingredients, and wrapped for making decoction if powdered concha is used; for external use, appropriate quantity to be ground into extremely fine powder and sprayed on the lesions or applied topically after mixing with oil .

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