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Kingdom: Plant

Origin in PRC Pharmacopoeia: chlorite schist (青礞石 qing méng shí) or mica schist (金礞石 jin méng shí) . (PRC Pharmacopoeia)

Origin in unofficial sources: chlorite schist; mica schist eng Lat

Use: Medicinal

Category: Phlegm-transforming cough-relieving panting-calming agents / Phlegm-transforming agents

Properties: Salty; balanced. (Also sweet according to some sources).

Channel entry: Lung and liver channels.

Actions and indications:

• Downbears qì and disperses phlegm: Repletion patterns of stubborn phlegm with cough and panting.
• Calms the liver and settles fright: Fright wind; epilepsy; mania and withdrawal.

Dosage and method: Oral: 6–10g in decoctions. Méng shí can be used in crude or calcined forms. It is usually supplied already calcined. It should be crushed and predecocted in cloth. Méng shí may also be used in powders and pills, at a dose of 1.5–3g.

Warnings: Méng shí is heavy and downbearing. It is contraindicated in spleen-stomach vacuity, chronic child fright wind, and in pregnancy.

Production area: 青礞石: Sìchuān, Húběi, Húnán, Jiāngsū, and Zhèjiāng. 金礞石: Héběi, Hénán.

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