（河间。一名天水散）
治伤寒、中暑，表里俱热，烦躁口渴，小便不通；泻痢，热疟，霍乱吐泻。下乳，滑胎
，解酒食毒，偏主石淋（暑热皆阳邪，在表则发热，在里则泻痢、霍乱、发疟，在上则烦渴，
在下
滑石（六两） 甘草（一两）。为末。冷水或灯心汤调下（丹溪曰∶泄泻及呕吐，生姜
汤下）。
此足太阳、手太阴药也。滑石气轻能解肌，质重能清降，寒能泻热，滑能通窍，淡能行
水，使肺气降而下通膀胱（火退则肺气下降，故能生水而利小便），故能祛暑住泻，止烦渴
而行小便也（小便利则大便实，而泻自止）；加甘草者，和其中气，又以缓滑石之寒滑也；
加辰砂者，以镇心神，而泻丙丁之邪热也（小肠为丙火，心为丁火）。其数六一者，取天一
生水、地六成之之义也（故又名天水散。刘河间曰∶统治上下表里诸病。盖取其能通除上下
三焦湿热也。然惟体盛湿多之人宜服之，以解暑利水，使湿热从小便出；若无湿热之人而多
服此，则反耗其津液
本方加辰砂少许（清心），名益元散；加薄荷少许（清肺），名鸡苏散；加青黛少许（清
肝），名碧玉散∶治同。本方加红曲五钱，名清六丸∶治赤痢（赤属热伤血分，红曲能调六
腑之血）。加干姜五钱，名温六丸∶治白痢（白属热伤气分，干姜能散湿热之气）。本方加生
柏叶、生车前、生藕节，名三生益元散∶治血痢。本方加牛黄，治虚烦不得眠。本方除甘草，
加吴茱萸一两，名茱萸六一散∶治湿热吞酸。本方除滑石，加黄 六两，大枣煎，热服，名
黄六一散∶治诸虚不
（刘河间创制，又名天水散）
主治伤寒、中暑，表里俱热，烦躁口渴，小便不通；以及泻痢、热疟、霍乱吐泻。具有下乳、滑胎、解酒食毒的功效，偏主石淋。
【组成】滑石（六两）、甘草（一两）。研为细末。用冷水或灯心草汤调服（朱丹溪说：治疗泄泻及呕吐，用生姜汤送下）。
【方解】本方是足太阳膀胱经和手太阴肺经的药物。滑石气轻能解除肌表之邪，质重能清降火热，性寒能泻除热邪，质地滑利能通利窍道，味淡能行水湿，使肺气肃降而下行通利膀胱（火邪退去则肺气下降，故能滋生津液而通利小便），所以能祛除暑邪、止住腹泻，消除烦躁口渴并通利小便（小便通利则大便结实，腹泻自然停止）；加入甘草，是为了调和其中焦之气，并且缓和滑石的寒凉滑利之性；加入辰砂，是为了镇安心神，并泻除丙丁之火邪热（小肠属丙火，心脏属丁火）。其比例为一比六，取“天一之水生成于地六”的含义（所以又名天水散。刘河间说：统管上下表里各种疾病。大概是取其能通除上中下三焦湿热的作用。然而只有体质壮实、湿气多的人适宜服用，以解暑利水，使湿热从小便排出；如果没有湿热之人却多服此药，反而会耗伤津液）。
本方加入少许辰砂（清心），名为益元散；加入少许薄荷（清肺），名为鸡苏散；加入少许青黛（清肝），名为碧玉散：主治相同。本方加入红曲五钱，名为清六丸：主治赤痢（红色属于热邪损伤血分，红曲能调理六腑之血）。加入干姜五钱，名为温六丸：主治白痢（白色属于热邪损伤气分，干姜能散除湿热之气）。本方加入生柏叶、生车前草、生藕节，名为三生益元散：主治血痢。本方加入牛黄，主治虚烦不得眠。本方去除甘草，加入吴茱萸一两，名为茱萸六一散：主治湿热吞酸。本方去除滑石，加入黄芩六两，大枣煎煮，热服，名为黄芩六一散：主治各种虚证……（原文此处截断）
(Originated by Liu Hejian, also known as Tiansan San)
Indications: Typhoid fever (Shanghan), heatstroke, heat in both exterior and interior, irritability with thirst, and dysuria; also diarrhea and dysentery, febrile malaria, cholera with vomiting and diarrhea. It promotes lactation, facilitates fetal expulsion, resolves alcohol and food toxicity, and specifically treats lithiasis (stone strangury).
[Composition] Huashi (Talcum, 6 liang) and Gancao (Licorice Root, 1 liang). Grind into fine powder. Take with cold water or a decoction of Jiaxincao (Centella asiatica / Pennywort stem). (Zhu Danxi stated: For diarrhea and vomiting, take with Shengjiang Tang [Ginger Decoction].)
[Fangjie (Formula Analysis)] This formula acts on the Foot-Taiyang Bladder Meridian and Hand-Taiyin Lung Meridian. Huashi (Talcum) has a light qi that can resolve muscle-layer pathogens, a heavy substance that can clear and descend fire, a cold nature that can purge heat, a slippery texture that can unblock orifices, and a bland taste that can promote water metabolism. It causes Lung Qi to descend and flow downward to unblock the Bladder (when Fire pathogen retreats, Lung Qi descends, thus generating fluids and promoting urination). Therefore, it can dispel summerheat, stop diarrhea, relieve irritability and thirst, and promote urination (when urine flows freely, stool becomes solid, and diarrhea stops naturally); Gancao (Licorice Root) is added to harmonize Middle Qi and to moderate the cold and slippery nature of Huashi (Talcum); Chen Sha (Cinnabar) is added to calm the Spirit and purge the pathogenic heat of Bing-Ding Fire (Small Intestine belongs to Bing Fire, Heart belongs to Ding Fire). The ratio of one to six takes its meaning from "Heaven One generates Water, Earth Six completes it" (hence also named Tiansan San). Liu Hejian said: "It governs various diseases in the upper, lower, exterior, and interior." This is because it can clear damp-heat from the Upper, Middle, and Lower Jiao. However, it is suitable only for those with robust constitution and excessive dampness, to resolve summerheat and promote diuresis, allowing damp-heat to exit via urine; if taken excessively by those without damp-heat, it will instead consume body fluids.
Adding a small amount of Chen Sha (Cinnabar) [to clear Heart Heat], it is named Yiyuan San; adding a small amount of Bohe (Mint Leaf) [to clear Lung Heat], it is named Jisu San; adding a small amount of Qingdai (Indigo Naturalis) [to clear Liver Heat], it is named Biyu San: all treat the same conditions. Adding Hongqu (Red Yeast Rice) 5 qian, it is named Qingliu Wan: treats red dysentery (red indicates heat damaging the Blood level; Hongqu regulates the blood of the Six Fu Organs). Adding Ganjiang (Dried Ginger) 5 qian, it is named Wenliu Wan: treats white dysentery (white indicates heat damaging the Qi level; Ganjiang disperses damp-heat Qi). Adding Sheng Baiye (Fresh Cupressus Leaf), Sheng Cheqiancao (Fresh Plantago Seed/Herb), and Sheng Oujie (Fresh Lotus Rhizome Node), it is named Sansheng Yiyuan San: treats bloody dysentery. Adding Niuhuang (Calculus Bovis), it treats deficiency irritability with insomnia. Removing Gancao (Licorice Root) and adding Wuzhuyu (Evodia Fruit) 1 liang, it named Zhuyu Liuyi San: treats acid regurgitation due to damp-heat. Removing Huashi (Talcum) and adding Huangqin (Scutellaria Root) 6 liang, decocted with Dazao (Jujube Fruit), taken hot, it is named Huangqin Liuyi San: treats various deficiency syndromes... (Text truncated here)