（《本经》中品）
【释名】铁液（《别录》）、铁屑（《拾遗》）、铁蛾。
弘景曰∶铁落，是染皂铁浆也。
恭曰∶是锻家烧铁赤沸，砧上锻之，皮甲落者。若以浆为铁落，则钢浸之汁，复谓何等？
落是铁皮，滋液黑于余铁，故又名铁液。
时珍曰∶生铁打铸，皆有花出，如兰如蛾，故俗谓之铁蛾，今烟火家用之。铁末浸醋书
字于纸，背后涂墨，如碑字也。
【气味】辛，平，无毒。
《别录》曰∶甘。
【主治】风热恶疮，疡疽疮痂，疥气在皮肤中（《本经》）。
除胸膈中热气，食不下，止烦，去黑子，可以染皂（《别录》）。治惊邪癫痫，小儿客忤，
消食及冷气，并煎汁服之（大明）。主鬼打鬼疰邪气，水渍沫出，澄清，暖饮一二杯（藏器）。
炒热投酒中饮，疗贼风痉。又裹以熨腋下，疗狐臭，有验（苏恭）。平肝去怯，治善怒发狂
（时珍）。
【发明】时珍曰∶按《素问·病态论》云∶帝曰∶有病怒狂者，此病安生？
岐伯曰∶生于阳也。阳气者，暴折而不决，故善怒，病名阳缺。曰∶何以知之？曰∶阳
明者常动，巨阳、少阳不动而动大疾，此其候也。治之当夺其食即已。夫食入于阴，长气于
阳，故夺其食即已。以生铁落为饮。夫生铁落者，下气疾也。此《素问》本文也，愚尝释之
云∶阳气怫郁而不得疏越，少阳胆木，挟三焦少阳相火、巨阳阴火上行，故使人易怒如狂，
其巨阳、少阳之动脉，可诊之也。夺其食，不使胃火复助其邪也。饮以生铁落，金以制木也。
木平则火降，故曰下气疾速，气即火也。又李仲南《永类方》云∶肿药用铁蛾及针砂入丸子
者，一生须断盐。盖盐性濡润，肿若再作，不可为矣。制法∶用上等醋煮半日，去铁蛾，取
醋和蒸饼为丸。每姜汤服三、四十丸，以效为度，亦只借铁气尔，故《日华子》云煎汁服之。
不留滞于脏腑，借铁虎之气以制肝木，使不能克脾土，土不受邪，则水自消矣。铁精、铁粉、
铁华粉、针砂、铁浆入药，皆同此意。
【附方】新一。
小儿丹毒∶ 铁屎研末，猪脂和敷之。（《千金方》）
（收录于《神农本草经》中品）
【释名】铁液（出自《名医别录》）、铁屑（出自《新修本草·拾遗》）、铁蛾。
陶弘景说：铁落，就是染黑丝织品时用的铁浆。
苏恭说：这是铁匠烧红铁块，在砧板上锻打时，剥落的皮甲。如果用铁浆作为铁落，那么钢铁浸泡后的汁液，又该称为什么呢？
铁落是铁皮的碎片，其滋生的液体比其它铁更黑，所以又名铁液。
李时珍说：生铁铸造时，表面都会析出花纹，像兰花也像飞蛾，所以俗称铁蛾，现在烟火匠人使用它。将铁末浸泡在醋中，用来在纸上写字，背面涂上墨，就像碑文一样。
【气味】辛味，性平，无毒。
《名医别录》记载：味甘。
【主治】治疗风热引起的恶疮、痈疽疮疡结痂、皮肤中的疥癣之气（出自《神农本草经》）。
清除胸膈中的热气，解决饮食不下，止住烦躁，去除黑痣，可以用来染黑丝织品（出自《名医别录》）。治疗惊邪癫痫、小儿客忤（小儿因惊吓或异气引起的病症），消食及驱散冷气，都煎汁服用（出自《唐本草》）。主治鬼击、鬼疰等邪气，用水浸泡后滤去泡沫，澄清后，温热饮用一两杯（出自《本草拾遗》）。炒热后投入酒中饮用，治疗贼风引起的痉挛。又用布包裹熨烫腋下，治疗狐臭，效果显著（出自苏恭）。平抑肝气，消除胆怯，治疗易怒发狂（出自李时珍）。
【发明】李时珍说：查阅《素问·病态论》记载：黄帝问：有人患怒狂病，这病是怎么产生的？
岐伯说：生于阳分。阳气者，突然受挫而不能决断，所以容易发怒，病名叫阳厥。黄帝问：怎么知道呢？岐伯说：阳明经脉常跳动，太阳、少阳经脉不跳动却跳动得很快大疾，这就是征候。治疗应当剥夺其饮食即可痊愈。食物进入阴分，助长阳分之气，所以剥夺饮食即可痊愈。用生铁落煎水饮用。生铁落，是下气很快的药物。这是《素问》的原文，我曾经解释它说：阳气郁结而不能疏泄通达，少阳胆木，挟带三焦少阳相火、太阳阴火上炎，所以使人易怒如狂，其太阳、少阳的动脉，可以诊察到。剥夺饮食，不让胃火再次助长邪气。饮用生铁落，是用金来克制木。木气平和则火势下降，所以说下气疾速，气即是火。另外李仲南《永类方》记载：治疗水肿的药丸中加入铁蛾和针砂的，一生必须断盐。因为盐性濡润，如果水肿再发作，就无法治愈了。制法：用上等醋煮半天，取出铁蛾，取醋调和蒸饼做成丸药。每次用姜汤送服三四十丸，以见效为限度，也只是借助铁的气机罢了，所以《日华子本草》说煎汁服用。铁气不留滞于脏腑，借铁虎之气来克制肝木，使肝木不能克制脾土，脾土不受邪侵，则水湿自然消退。铁精、铁粉、铁华粉、针砂、铁浆入药，都是这个意思。
(Recorded in the Middle Category of *Shennong Bencao Jing*)
[Names] Tieye (Iron Liquid, from *Mingyi Bie Lu*), Tiexie (Iron Filings, from *Xinxiu Bencao · Shiyi*), Tie'e (Iron Moths).
Tao Hongjing stated: "Tieluo" is the iron slurry used for dyeing silk black.
Su Gong stated: "It is the scale that falls off when blacksmiths heat iron until red-hot and forge it on an anvil. If one were to use iron slurry as 'Tieluo', then what would one call the juice obtained by soaking steel?"
"Tieluo" refers to flakes of iron skin; its infused liquid is darker than other irons, hence also named "Tieye".
Li Shizhen stated: "When cast iron is forged, patterns emerge on the surface, resembling orchids or moths, hence commonly called 'Tie'e' (Iron Moths), which are now used by pyrotechnicians. Iron filings soaked in vinegar can be used to write characters on paper; ink is applied to the back, resembling inscriptions on stone steles."
[Properties and Flavor] Pungent, Neutral, Non-toxic.
*Mingyi Bie Lu* records: Sweet.
[Indications] Treats severe sores caused by Wind-Heat, carbuncles, ulcers with crusts, and scabies qi within the skin (*Shennong Bencao Jing*).
Clears hot qi in the chest and diaphragm, aids digestion when food intake is difficult, relieves irritability, removes dark spots, and can be used to dye silk black (*Mingyi Bie Lu*). Treats fright evil and epilepsy, pediatric Ke Wu (a condition in children caused by fright or alien influences), promotes digestion, and dispels cold qi; all should be taken as a decoction (*Tang Bencao*). Mainly treats Gui Da (ghost strike) and Gui Zhu (ghost consumption) evil qi; soak in water, remove foam, clarify, and drink one or two cups warm (*Bencao Shiyi*). Heat-fried and thrown into wine for drinking treats Ze Feng (treacherous wind) causing spasms. Also wrapped in cloth and applied as a hot compress to the armpits to treat axillary osmidrosis (fox odor), with verified efficacy (Su Gong). Calms the Liver, removes timidity, and treats excessive anger and mania (Li Shizhen).
[Elucidation] Li Shizhen stated: According to *Suwen · Bingtai Lun*: The Yellow Emperor asked, "There is a person suffering from anger and mania; how does this disease arise?"
Qibo answered, "It arises from Yang. When Yang Qi suffers sudden frustration and fails to resolve, the person becomes prone to anger; the disease is named Yang Jue (Yang Reversal)." The Yellow Emperor asked, "How do you know this?" Qibo said, "The Yangming channel usually pulsates, while the Taiyang and Shaoyang channels do not; if they pulsate rapidly and vigorously, this is the sign. Treatment involves depriving the patient of food, which will cure it. Food enters the Yin and generates Qi in the Yang; thus, depriving food cures it. One should drink Shengtie Luo (Raw Iron Drops). Shengtie Luo is a substance that descends Qi rapidly." This is the original text of *Suwen*. I have interpreted it as follows: When Yang Qi is stagnant and cannot vent freely, the Wood of the Shaoyang Gallbladder, carrying the Ministerial Fire of the Sanjiao and Shaoyang, and the Yin Fire of the Taiyang, ascends, causing people to become easily angered and manic. The pulses of the Taiyang and Shaoyang channels can be diagnosed here. Depriving food prevents Stomach Fire from further assisting the pathogen. Drinking Shengtie Luo uses Metal to control Wood. When Wood is balanced, Fire descends; hence it is said to descend Qi rapidly, where Qi is Fire. Furthermore, Li Zhongnan's *Yonglei Fang* states: For pills treating edema containing Tie'e and Zhen Sha, salt must be strictly avoided for life. Because salt has a moistening nature, if edema recurs, it will be incurable. Preparation method: Boil superior grade vinegar for half a day, remove the Tie'e, take the vinegar, mix with steamed dough balls to make pills. Take 30–40 pills each time with Ginger Decoction, adjusting until effective. This merely borrows the Qi of iron; hence *Rihua Zi Bencao* states it should be taken as a decoction. The Qi of iron does not stagnate in the Zang-Fu organs; it borrows the Qi of the Iron Tiger to control Liver Wood, preventing Liver Wood from overacting on Spleen Earth. Since Spleen Earth is not attacked by pathogens, Water naturally dissipates. Tie Jing (Iron Essence), Tie Fen (Iron Powder), Tie Hua Fen (Iron Flower Powder), Zhen Sha (Needle Sand), and Tie Jiang (Iron Slurry) used in medicine all follow this principle.
[Attached Prescriptions] New Prescription 1.
Pediatric Dan Du (Erysipelas): Grind Tieshi (Iron Excrement/Slag) into powder, mix with Pig Fat, and apply externally (*Qianjin Fang*).