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Treats Yangming disease presenting with a floating pulse, fever, thirst with desire to drink water, and dysuria; also treats Shaoyin disease with diarrhea persisting for six or seven days, accompanied by cough, vomiting, thirst, irritability, and insomnia.

Zhu Ling Tang (Polyporus Decoction): Zhu Ling (Poria Cocos Sclerotium, peeled), Fu Ling (Poria Cocos Sclerotium), Ze Xie (Alisma Rhizome), Hua Shi (Talcum Powder, ground), E Jiao (Donkey-hide Gelatin) — each 1 liang. Use 4 sheng of water. First decoct the first four ingredients until reduced to 2 sheng, strain off the dregs, then add E Jiao and melt it. Take 7 ge warm, three times daily.

Zhu Ling Tang contains both types of Poria (Zhu Ling and Fu Ling), along with Ze Xie, E Jiao, and Hua Shi ground into powder. It promotes diuresis, nourishes Yin, and clears heat. (This is essentially Wu Ling San [Five-Ingredient Poria Decoction] without Gui Zhi [Cinnamon Twig] and Bai Zhu [Atractylodes Macrocephala Rhizome], but with added E Jiao to nourish Yin. Although both formulas promote diuresis, their thermal natures are distinctly different; only those with clear discernment understand this.) It cures urinary retention, irritability, vomiting, and thirst. (Irritability indicates Heat; dysuria indicates Dampness. When Damp-Heat stagnates and steams, it leads to vomiting and thirst.) If excessive sweating has caused dryness in the Stomach, this formula is contraindicated, as it may further deplete Body Fluids and lead to hard stools. (The *Shanghan Lun · Yangming Chapter* states: "Excessive sweating causes Stomach dryness...")

Treats Taiyang disease where, after sweating, the patient presents with cold extremities and palpitations below the heart, without thirst.

Fu Ling Gan Cao Tang (Poria and Licorice Decoction): Fu Ling (Poria Cocos Sclerotium), Gui Zhi (Cinnamomi Ramulus) — each 2 liang; Gan Cao (Glycyrrhizae Radix et Rhizoma, honey-fried) — 1 liang; Sheng Jiang (Zingiberis Rhizoma Recens) — 3 liang. Use 4 sheng of water, decoct to obtain 2 sheng, and take warm in divided doses.

Fu Ling Gan Cao Tang consists of Fu Ling, Gui Zhi, and Sheng Jiang. It drains Water-Fluid (via Fu Ling and Sheng Jiang) and supports Yang Qi (via Gui Zhi and Gan Cao). It is commonly used for palpitations and cold extremities caused by Water-Fluid stagnating below the Heart. (When Water-Fluid stagnates below the Heart, palpitations occur; when Yang Qi fails to circulate, cold extremities result. Cold extremities due to sweating are not treated by this formula. Various schools of thought differ on this, regarding it as a condition of Yang deficiency, hence the use of Fu Ling Gan Cao Tang.)

Treats post-Taiyang disease sweating, where the patient experiences palpitations below the umbilicus and a sensation that Ben Tun (Rushing Pig) syndrome is about to manifest.

Ling Gui Gan Cao Da Zao Tang (Poria, Cinnamon Twig, Licorice, and Jujube Decoction): Fu Ling (Poria Cocos Sclerotium) — 8 liang; Gui Zhi (Cinnamomi Ramulus) — 4 liang; Gan Cao (Glycyrrhizae Radix et Rhizoma, honey-fried) — 2 liang; Da Zao (Jujubae Fructus) — 12 pieces. Use 1 dou of Gan Lan Shui (Gentle Boiling Water). First decoct Fu Ling until the volume reduces by 2 sheng, then add the remaining herbs.

In Ling Gui Gan Cao Da Zao Tang, Gan Cao and Da Zao strengthen the Spleen and Stomach (Earth element); Fu Ling controls Water-Fluid; Gui Zhi protects Heart Yang. Fu Ling is used in a heavy dose and must be decocted first. (Herbs used in heavy doses within a formula generally require prior decoction to fully extract their efficacy or moderate their properties.) Palpitations below the umbilicus are caused by Water-Qi rushing up to harass the Heart. Gui Zhi can calm the rebellious Qi and descend the surge, making it suitable for treating palpitations.