味苦。微咸。性大寒。无毒。禀至阴之气而生。降也。阴也。茎叶同用。
【主治】主疗时气头痛。大热口疮。（别录）治温疫寒热。（甄权）治热毒风。心烦闷。
渴疾口
目）伤寒
【归经】入心胃二经。为解散热毒之品。（二经泻热主药）
【前论】李象先曰。阳毒则狂斑烦乱。以大青、升麻。可回困笃。楼全善曰。大青能通
解心
【禁忌】经疏曰。此乃阴寒之物。止用以除天行热病。不可施之虚寒脾弱之人。
味咸。性寒。无毒。此即染淀瓮上沫紫碧色者。市肆以干淀充之。便有锻石。宜水飞
淘净锻石。其淀。乃蓝与锻石作成者。气味与蓝稍有不同。而止血拔毒杀虫之功更胜于蓝。
蓝叶汁。即生蓝叶可以染青者。如一时不得。以青布浸汁亦善。
【主治】主消食积。（丹溪）主泻肝。散五脏郁火。解中下焦蕴蓄风热。吐咯痢血。小
儿
惊
止
吐衄血。金疮血闷。除烦止渴。女人产后血晕。小儿壮热热疳。（大明）〔青布〕解诸物毒。
天行热毒。小儿丹毒。并渍汁饮。烧灰敷恶疮。（医鉴）
【归经】入肝经。为除热解毒之品。（兼能凉血）
【前论】丹溪曰。蓝属水。能使败血分归经络。安常曰。诸蓝性味皆不甚远。故皆能杀
虫除
【禁忌】经疏曰。凡血症。非血分实热而由阴虚内热。阳无所附。火气因空上炎。发为
唾咯
【大青】
味苦，微咸。性大寒。无毒。禀受至阴之气而生。性质沉降，属阴。茎和叶一同使用。
【主治】主要治疗时气病引起的头痛、高热及口疮。（《名医别录》）治疗温疫引起的寒热往来。（甄权）治疗热毒风邪、心烦闷乱、口渴疾（目）、伤寒（此处原文有缺漏或错简，依文意推测为相关热病症状）。
【归经】入心、胃二经。是解散热毒的药物。（这两经泻热的要药）
【前论】李象先说：阳毒证出现狂躁、斑疹、烦乱，用大青、升麻，可以挽回危重病情。楼全善说：大青能通解心……（原文此处截断，意指通解心经热毒）。
【禁忌】缪希雍《本草经疏》说：这是阴寒性质的药物，仅用于去除天行（流行性）热病。不可施用于虚寒脾弱的人。
【青黛】
味咸。性寒。无毒。这就是染布缸上漂浮的紫碧色泡沫。市场上常用干淀来冒充它，其中含有锻石（石灰类物质），适宜用水飞法淘洗净锻石。这种淀，是由蓝草与锻石制作而成的。气味与蓝草稍有不同，但止血、拔毒、杀虫的功效比蓝草更胜一筹。
蓝叶汁，即新鲜蓝草叶可以染出青色者。如果一时得不到，用青布浸泡出的汁液也很好。
【主治】主要消除食积。（朱丹溪）主要清泻肝火，疏散五脏郁结之火，解除中下焦蕴蓄的风热，治疗吐血、咯血、痢疾便血、小儿惊风……（原文此处有缺漏）止住吐衄血（鼻出血等），治疗金疮（刀伤）血闷，除烦止渴，治疗妇女产后血晕、小儿壮热、热疳。（孟诜《食疗本草》/ 大明）〔青布〕能解各种毒物毒性、天行热毒、小儿丹毒，均浸泡汁液饮用；烧成灰敷治恶疮。（《医鉴》）
【归经】入肝经。是除热解毒的药物。（兼能凉血）
【前论】朱丹溪说：蓝草属水，能使败血分别回归经络。安常说：各种蓝草的性味都相差不远，所以都能杀虫除……（原文此处截断）。
【禁忌】缪希雍《本草经疏》说：凡是血症，如果不是血分实热，而是由阴虚内热、阳气无所依附、火气因空虚而上炎所导致的，发出唾咯……（原文此处截断，意指此类情况禁用或慎用）。
[Da Qing / Indigo Naturalis (Stem and Leaf)]
Bitter, slightly salty. Cold in nature. Non-toxic. Born from the qi of extreme yin. Descending. Yin in quality. The stems and leaves are used together.
[Maintaining Health] Primarily treats headache caused by epidemic qi, high fever, and mouth ulcers. (*Mingyi Bielu*) Treats alternating chills and fever caused by warm epidemics. (Zhen Quan) Treats wind-heat toxin, mental restlessness, thirst, and cold damage syndromes.
[Meridian Tropism] Enters the Heart and Stomach meridians. It is a substance that resolves heat and detoxifies. (The principal herb for clearing heat in these two meridians.)
[Preliminary Discussion] Li Xiangxian stated: In Yang toxicity syndromes characterized by mania, macules, and mental confusion, Da Qing and Sheng Ma can rescue critical conditions. Lou Quanshan stated: Da Qing can unblock and resolve Heart... [text cuts off].
[Contraindications] Miao Xiyong in *Bencao Jing Shu* stated: This is a yin-cold substance, used only to eliminate epidemic heat diseases. It should not be applied to individuals with deficiency-cold and weak Spleen function.
[Qing Dai / Indigo Naturalis (Processed)]
Salty. Cold in nature. Non-toxic. This refers to the purple-green foam floating on the surface of dye vats. The market often substitutes it with dried sediment, which contains lime (Duan Shi). It is advisable to purify the sediment by washing away the lime using the water-flying method. This sediment is made from Indigo plants and lime. Its flavor and nature differ slightly from raw Indigo leaves, but its efficacy in stopping bleeding, extracting toxins, and killing parasites is superior to that of Indigo.
Indigo leaf juice refers to the juice extracted from fresh Indigo leaves capable of dyeing blue. If unavailable at the moment, juice soaked from blue cloth is also effective.
[Maintaining Health] Primarily eliminates food stagnation. (Zhu Danxi) Primarily drains Liver fire, disperses pent-up fire in the five Zang organs, resolves wind-heat accumulated in the middle and lower Jiao, treats hematemesis, hemoptysis, dysentery with blood, pediatric convulsions... [text cuts off]. Stops epistaxis and other bleeding, treats traumatic injuries with blood stasis, relieves irritability and thirst, treats postpartum blood dizziness in women, and high fever or heat-type malnutrition in children. (Meng Shen) [Blue Cloth] Resolves various toxins, epidemic heat toxins, and pediatric erysipelas; drink the soaked juice. Burn to ash and apply topically to treat malignant sores. (*Yi Jian*)
[Meridian Tropism] Enters the Liver meridian. It is a substance that clears heat and detoxifies. (Also cools the Blood.)
[Preliminary Discussion] Zhu Danxi stated: Indigo belongs to Water, enabling damaged blood to return to the collaterals. An Chang stated: The flavors and natures of all types of Indigo are not far apart, thus all can kill parasites and remove... [text cuts off].
[Contraindications] Miao Xiyong in *Bencao Jing Shu* stated: For any blood disorders, if they are not due to excess heat in the Blood level, but rather due to yin deficiency with internal heat, where Yang has no anchor, and fire flares upward due to emptiness, causing spitting and coughing... [text cuts off].