开关格通隔绝，治中焦实热闭塞，上下不通，不吐不下，腹满膨膨喘急方
川大黄（切，以水一升浸） 黄芩 泽泻 升麻 芒硝（各三两） 羚羊角 栀子（各
四两）
元参（八两） 地黄汁（一升）
上九味 咀，以水七升，煮取二升三合，下大黄更煮两沸，去滓，下硝，分三服。
治中焦热下痢水谷方。
蓝青汁（三升） 川连（八两） 黄柏（四两） 乌梅肉 地肤子 地榆 白术（各二
两） 阿
胶（
上八味为末，以蓝青汁和微火煎，丸如杏仁大，饮服三丸，日二。以七月七日合大良，
当并手丸之。
治中焦寒洞泄下痢，或因霍乱后泻黄白无度，腹中虚痛方。
黄连 酸石榴皮 地榆 阿胶（各四两） 黄柏 当归 浓朴 干姜（各三两）
上八味 咀，以水九升，煮取三升，去滓，下阿胶更煎取烊，分三服。
治四肢不可举动，多汗洞痢方∶
灸大横随年壮，穴在挟脐两边各二寸五分。
论曰∶下焦如渎（渎者如沟，水决泄也），其气起胃下脘，别回肠，注于膀胱而渗入焉。
故水谷者，常并居于胃中成糟粕，而俱下于大肠，主足太阳，灌渗津液，合膀胱，主出不主
入，别于清浊，主肝肾之病候也。若实则大小便不通利，气逆不续，呕吐不禁，故曰走哺。
若虚则大小便不止，津液气绝。人饮酒入胃，谷未熟而小便独先下者何？盖酒者，熟谷之液
也。其气悍以滑，故后谷入而先谷出也，所以热则泻于肝，寒则补于肾也。
【方名】开关格通隔绝，治疗中焦实热闭塞、上下不通、不吐不下、腹部胀满膨隆且呼吸急促的方剂。
川大黄（切片，用一升水浸泡） 黄芩 泽泻 升麻 芒硝（各三两） 羚羊角 栀子（各四两）
玄参（八两） 地黄汁（一升）
以上九味药，切碎，用七升水煎煮，取二升三合药液，放入大黄再煮沸两次，滤去药渣，加入芒硝，分三次服用。
【方名】治疗中焦热邪导致的下痢、排泄物中含有未消化食物残渣的方剂。
蓝青汁（三升） 川黄连（八两） 黄柏（四两） 乌梅肉 地肤子 地榆 白术（各二两） 阿胶（适量）
以上八味药研成细末，用蓝青汁调和，在微火上煎煮，制成如杏仁大小的丸剂，每次服用三丸，用水送服，每日两次。七月七日制作效果最佳，制作时需双手和药。
【方名】治疗中焦寒邪导致的洞泄下痢，或因霍乱之后腹泻黄白色无度、腹部虚痛的方剂。
黄连 酸石榴皮 地榆 阿胶（各四两） 黄柏 当归 厚朴 干姜（各三两）
以上八味药，切碎，用九升水煎煮，取三升药液，滤去药渣，加入阿胶继续煎煮至完全溶化，分三次服用。
【治法】治疗四肢无法活动、多汗且严重腹泻的方剂：
艾灸大横穴，灸壮数根据患者年龄而定，穴位位于肚脐两侧各二寸五分处。
【论述】下焦的功能如同沟渠（渎即沟渠，指水流决口排泄），其气机起始于胃的下脘部，分出回肠，注入膀胱并渗入其中。
因此，水谷通常共同存在于胃中形成糟粕，然后一同下行进入大肠。大肠主足太阳经，灌注并渗泌津液，与膀胱相合，主要功能是排出废物而非摄入，分别清浊之气，主管肝肾相关的病候。如果实证，则大小便不通利，气机上逆而断续，呕吐不止，这被称为“走哺”。如果虚证，则大小便失禁，津液和气机断绝。人饮酒后酒入胃中，谷物尚未消化小便却先排出，这是为什么呢？因为酒是熟谷的液体。其气性剽悍滑利，所以虽然后于谷物进入胃中，却先于谷物排出。因此，热证时泻肝火，寒证时补肾阳。
[Formula Name] Kai Guan Ge Tong Ge Jue (Opening the Obstruction and Unblocking the Blockage), a formula for treating severe heat accumulation in the Middle Jiao causing blockage, obstruction of ascent and descent, absence of both vomiting and defecation, abdominal distension with fullness, and rapid breathing.
Rhubarb Radix et Rhizoma (sliced, soaked in one sheng of water) Scutellariae Radix (Huangqin) Alisma Rhizoma (Zexie) Cimicifugae Rhizoma (Shengma) Mirabilite (Mangxiao) [each 3 liang] Antelope Horn (Lingyangjiao) Gardeniae Fructus (Zhizi) [each 4 liang]
Scrophulariae Radix (Yuanshen) Juice of Rehmanniae Radix Preparata (Dihuang Zhi) [1 sheng]
The above nine ingredients are coarsely crushed, decocted in seven sheng of water to obtain two sheng and three he of liquid. Add Rhubarb Radix et Rhizoma and boil for two more boils. Strain the dregs, add Mirabilite, and divide into three doses.
[Formula Name] A formula for treating dysentery with undigested food residues caused by heat in the Middle Jiao.
Indigo Naturalis Juice (Lanqing Zhi) [3 sheng] Coptidis Rhizoma (Chuanlian) [8 liang] Phellodendri Cortex (Huangbai) [4 liang] Mesgae Fructus Pruni Mume (Wumei Rou) Kochiae Fructus (Difuzi) Sanguisorbae Radix (Diyu) Atractylodis Macrocephalae Rhizoma (Baizhu) [each 2 liang] Colla Corii Asini (Ejiao) [appropriate amount]
The above eight ingredients are ground into powder, mixed with Indigo Naturalis Juice, and decocted over low heat. Form pills the size of apricot kernels. Take three pills per dose with warm water, twice daily. Prepared on the seventh day of the seventh lunar month is most effective; knead with both hands during preparation.
[Formula Name] A formula for treating profuse watery diarrhea and dysentery caused by cold in the Middle Jiao, or yellowish-white uncontrolled diarrhea following cholera-like syndrome, accompanied by empty pain in the abdomen.
Coptidis Rhizoma (Huanglian) Pericarpium Granati Acidi (Suan Shiliu Pi) Sanguisorbae Radix (Diyu) Colla Corii Asini (Ejiao) [each 4 liang] Phellodendri Cortex (Huangbai) Angelicae Sinensis Radix (Danggui) Magnoliae Officinalis Cortex (Noupu) Zingiberis Rhizoma Recens (Ganjiang) [each 3 liang]
The above eight ingredients are coarsely crushed, decocted in nine sheng of water to obtain three sheng of liquid. Strain the dregs, add Colla Corii Asini, and continue decocting until fully dissolved. Divide into three doses.
[Therapeutic Method] For treating inability to move the limbs, excessive sweating, and profuse diarrhea:
Moxibustion at Dahuang (ST25), number of moxa cones based on the patient's age. The point is located 2.5 cun lateral to either side of the umbilicus.
[Discussion] The Lower Jiao functions like a ditch (du refers to a ditch, indicating the discharge of water). Its qi originates from the lower epigastrium of the Stomach, diverges into the ileum, and pours into the Bladder where it seeps in.
Therefore, food and drink usually reside together in the Stomach to form waste, which then descends together into the Large Intestine. The Large Intestine governs the Foot-Taiyang channel, infuses and渗 (seeps) fluids, combines with the Bladder, and primarily governs excretion rather than intake, separating clear from turbid, and governing pathological manifestations related to the Liver and Kidney. In excess conditions, there is difficulty in urination and defecation, rebellious qi that fails to descend, and uncontrollable vomiting, known as "Zou Bu" (running feeding/overflowing). In deficiency conditions, there is incontinence of urine and feces, and exhaustion of fluids and qi. When a person drinks alcohol, it enters the Stomach, yet urine is excreted before the grain is digested. Why? Because alcohol is the fluid of cooked grain. Its qi is fierce and slippery, so although it enters the stomach after the grain, it exits before the grain. Thus, in heat conditions, the Liver is purged; in cold conditions, the Kidney is tonified.