味咸。性平。无毒。得水中之阴气而生。可升可降。阴也。畏旋复花。
【主治】主目障翳痛青盲。久服益精。（别录） 肝肺风热。骨蒸劳热。（李 ） 通五
淋。（
【归经】入肝经。为专除风热之品。
【前论】无己曰。石决明咸寒。入血除热。又能入肾补阴。
鳌按、石决明大补肝阴。肝经不足者。断不可少。
【炮制】李 曰。凡用。磨去粗皮。面裹煨熟。捣研极细。
味咸。性寒。无毒。禀水中之阴气而生。降也。阴也。曰海者。别于江湖地泽所生也。
【主治】主热痰。湿痰。老痰。顽痰。疝气。白浊。带下。同香附末、姜汁调服。主心
痛。
散肿毒。治
【归经】入心肾二经。为软坚润下之品。
【前论】仲淳曰。诸痰皆火气上炎煎熬津液而成。得此能软坚润下。故痰消。
【禁忌】经疏曰。虽善消痰积血块。然脾胃虚寒。宜少用。
味咸。性平。无毒。禀水中阳气而生。降也。阴中阳也。
【主治】主一切血气。冷气。症癖。火 醋淬。醋丸服。（日华） 化痰积。消血块。（丹
溪）
【归经】入肝经。兼入肺脾二经。为软坚散结之品。
【前论】吴瑞曰。瓦楞消痰。其功最大。凡痰膈病用之如神。
【炮制】雷公曰。取陈久者。火 赤。米醋淬三度。出火毒。研粉。
以上泻剂介部
【石决明】
味咸。性平。无毒。禀受水中阴气而生。药势可升可降。属阴。畏旋复花。
【主治】主治目障、翳痛、青盲。长期服用可益精。（出自《名医别录》）治疗肝肺风热、骨蒸劳热。（出自李珣）通利五淋。
【归经】入肝经。是专门清除风热的药物。
【前论】李珣说：石决明咸寒，入血分清除热邪，又能入肾补阴。
鳌按（赵学敏按语）：石决明大补肝阴。肝经不足者，绝对不可缺少。
【炮制】李珣说：凡使用，需磨去粗皮，用面粉包裹煨熟，捣碎研成极细粉末。
【海蛤粉】
味咸。性寒。无毒。禀受水中阴气而生。药势主降。属阴。称“海”者，是为了区别于在江湖地泽中生长的种类。
【主治】主治热痰、湿痰、老痰、顽痰、疝气、白浊、带下。与香附末、姜汁调服，主治心痛。散除肿毒。
【归经】入心、肾二经。是软坚润下的药物。
【前论】张遂辰（仲淳）说：各种痰证都是火气上炎煎熬津液而成，得到此药能软坚润下，所以痰消。
【禁忌】缪希雍（经疏）说：虽然善于消除痰积和血块，但脾胃虚寒者，宜少用。
【瓦楞子】
味咸。性平。无毒。禀受水中阳气而生。药势主降。属于阴中之阳。
【主治】主治一切血气、冷气、症癖。用火煅红后醋淬，制成醋丸服用。（出自日华子）化痰积，消血块。（出自朱丹溪）
【归经】入肝经，兼入肺、脾二经。是软坚散结的药物。
【前论】吴瑞说：瓦楞子消痰，功效最大。凡是痰膈病用它如同神助。
【炮制】雷公说：取陈久的瓦楞子，用火煅烧至赤红，用米醋淬炼三次，去除火毒，研成粉末。
以上为泻剂介部药材
[Concha Heteroconcha] (Shi Jue Ming)
Salty in flavor. Neutral in nature. Non-toxic. Born from the yin qi of water. Its action can ascend and descend. It is Yin. It fears Inula Flower (Xuan Fu Hua).
【Indications】Mainly treats visual obstructions, painful nebulae (corneal opacities), and blindness. Long-term use benefits essence. (From *Bie Lu*) Treats wind-heat of the Liver and Lung meridians, bone-steaming consumptive fever. (From Li Xun) Unblocks the Five Stranguries (Wu Lin).
【Meridian Tropism】Enters the Liver Meridian. It is a specialized product for eliminating wind-heat.
【Previous Discussions】Li Xun said: Concha Heteroconcha is salty and cold, enters the blood level to remove heat, and can also enter the Kidney to tonify Yin.
Zhao Xuemin's Note: Concha Heteroconcha greatly tonifies Liver Yin. For those with insufficiency of the Liver Meridian, it is absolutely indispensable.
【Processing】Li Xun said: When used, grind off the rough skin, wrap in flour, bake until cooked, crush, and grind into an extremely fine powder.
[Concha Meretricis Pulverata] (Hai Ge Fen)
Salty in flavor. Cold in nature. Non-toxic. Born from the yin qi of water. Its action descends. It is Yin. The term "Sea" is used to distinguish it from those born in rivers, lakes, or marshes.
【Indications】Mainly treats Phlegm-Heat, Damp-Phlegm, Old Phlegm, Stubborn Phlegm, Hernia, White Turbidity, and Leukorrhea. Mixed with Cyperi Rhizoma Powder (Xiang Fu Mo) and Ginger Juice, it treats Heart Pain. Disperses swelling and toxicity.
【Meridian Tropism】Enters the Heart and Kidney meridians. It is a product that softens hardness and promotes downward movement.
【Previous Discussions】Zhang Suichen (Zichun) said: All phlegm is formed by fire qi flaming upward and scorching body fluids. With this herb, hardness is softened and downward movement is promoted, thus the phlegm dissipates.
【Contraindications】Miao Xiyong (Jingshu) said: Although it excels at resolving phlegm accumulations and blood masses, it should be used sparingly by those with Spleen-Stomach deficiency-cold.
[Concha Arcae] (Wa Leng Zi)
Salty in flavor. Neutral in nature. Non-toxic. Born from the yang qi of water. Its action descends. It is Yang within Yin.
【Indications】Mainly treats all types of Blood-Qi stagnation, Cold Qi, and Masses (Zheng Pi). Calcined red over fire, quenched in Vinegar, and taken as Vinegar pills. (From Ri Hua) Resolves phlegm accumulations, eliminates blood masses. (From Zhu Danxi)
【Meridian Tropism】Enters the Liver Meridian, and concurrently enters the Lung and Spleen meridians. It is a product that softens hardness and dissipates nodules.
【Previous Discussions】Wu Rui said: Concha Arcae resolves phlegm; its efficacy is greatest. For any Phlegm-Chest disease, using it is like divine assistance.
【Processing】Lei Gong said: Take aged shells, calcine them over fire until red, quench three times in Rice Vinegar, eliminate fire toxicity, and grind into powder.
The above are Bivalve Category herbs for Purging Agents.