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Oyster Shell Powder

牡蛎散 〔牡蠣散〕mǔ lì sǎn

Source: Hé Jì Jú Fāng 和剂局方

Ingredients:

Action: Boosts qì and secures the exterior; constrains yīn and checks sweating.

Indication: Night sweating or spontaneous sweating due to vacuity.

Category: Astringing formulas / Exterior-resolving sweat-checking formulas

Method: Originally prepared as a powder, but now prepared as a decoction.

Warnings: Do not use this formula in critical conditions where there are signs of reversal and collapse of yáng such as profuse dripping sweating and a pulse on the verge of expiration. Such cases require yáng-returning desertion-stemming formula such as shenfutangor shenfulongmutang.

Rationale: The sovereign agent is Mǔ lì which constrains yīn and subdues yáng, astringes, and checks sweating. The minister agent is Huáng qí, which boosts qì and secures the exterior. The assistants are Fú xiǎo mài and Má huáng gēn, which are used for their sweat-checking action.

Variations:

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