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[Hutong Lei (Poplar Tears)]
Indications: Clears heat, eliminates parasites, and softens hardness. Treats severe heat-toxic wind, wind-lao disease, toothache (specifically referring to pain resembling clam-shell shape or severe dental pain), gingival bleeding, sore throat and swelling, vexation and oppression in the chest and abdomen, scrofula and tubercles, osteomyelitis of the jaw (Gucao Feng), and dental caries. Resolves fire toxin, facial toxin, and toxins from metals and stones. For cattle and horses suffering from acute yellowing with black sweat (grind into powder, take 2-3 liang, and administer orally).

Hutong Lei San (Poplar Tears Powder): Hutong Lei, Xixin (Asarum Root), Chuanxiong (Szechwan Lovage Rhizome), Baizhi (Angelica Dahurica Root) each 1.5 qian; Hanshuishi (Calcitum) 2 qian; Shengdi Huang (Rehmannia Root) 1 qian; Qingyan (Halite) 0.2 qian. Grind all ingredients into fine powder. Apply dry powder directly to the affected area, rinse mouth after a short while to remove residue, and reapply. Used for treating foul-smelling rotting gums with intermittent discharge of white pus.

[Huangbai (Phellodendron Bark)]
Indications: Nourishes yin, descends fire, clears heat, eliminates parasites, strengthens bone marrow, benefits the lower jiao, drains ministerial fire of the bladder, and tonifies insufficiency of kidney water. Treats red-hot skin, rebellious qi, surging pulse, jaundice, bone-steaming tidal fever, epidemic red eyes, blurred vision, tinnitus, epistaxis, throat swelling, bi-syndrome of the throat, heart heat, heart pain, heat accumulation in the five zang organs, intestinal wind, hemorrhoidal bleeding, bloody dysentery, hematochezia, impotence, xiao-ke (wasting-thirst syndrome), polyuria, urinary retention. For women during pregnancy suffering from dysentery, genital erosion, fontanelle swelling in infants, umbilical ulcers, various painful sores, carbuncles and furuncles, breast abscesses, frostbite, fire-toxic sores, hot blister sores, scalp sores, insect-infested sores, oral ulcers, penile sores.

Huangbai Wan (Phellodendron Pill): Huangbai 5 qian, Chishao (Red Peony Root) 4 qian. Grind into powder, mix with rice paste to form pills the size of hemp seeds. Take 10-20 pills per dose before meals, washed down with rice water. Used for treating pediatric heat-dysentery with blood in stool.

Another prescription: Huangbai (lightly stir-fried and crushed), Danggui (Angelica Sinensis Root) (lightly stir-fried and crushed) each 1 liang. Grind into powder, mix with roasted garlic to form pills the size of mung beans. Take 7 pills per dose, 3-4 times daily. Used for treating chronic pediatric white dysentery accompanied by abdominal distension and pain.

Huangbai San (Phellodendron Powder): Huangbai 1 liang, Wubeizi (Galla Chinensis) 2 qian, Miduoseng (Litharge), Gancao (Licorice Root) each 1 qian. Except for Huangbai, grind the remaining ingredients into powder. Mix with clear water and apply onto slices of Huangbai. Roast over fire 3-5 times. Cut the treated Huangbai into thin slices and apply to the lesion before sleep; recovery is expected by dawn. Used for treating callous lips (Jianchun).

Another prescription: Huangbai (coated with honey and roasted until dry), Baijiangcan (Bombyx Batryticatus) each equal parts. Grind into powder and sprinkle on the affected area. Used for treating damp sores.

Another prescription: Huangbai, Dahuang (Rhubarb Root), Puxiao (Mirabilite), Jiziqiao (Eggshell), Hanshuishi each equal parts. Grind into powder, mix with water, and apply topically. Used for treating burns and scalds.

Another prescription: Huangbai, Huanglian (Coptis Rhizome), Fangfeng (Saposhnikovia Root) each 4 qian; Hujiao (Black Pepper) 5 qian; Dafengrou (Semecarpus Anacardium Nut), Kufan (Alum) each 2 qian; Da Huixiang (Fennel Fruit), Huajiao (Zanthoxylum Pericarpium) each 3 qian; Xionghuang (Realgar), Liuhuang (Sulfur) each 0.5 qian; Binglang (Areca Seed) 2 pieces; Banmao (Mylabris) 10 pieces; Chaonao (Borneol) 1.5 qian. Grind into powder, mix with lard, and apply topically. Can also be rubbed on numb areas. Rub on broken skin if itching leads to scratching wounds. Used for treating dry and cracked skin on hands and feet, which may break open like water blisters, or itching resembling scabies. Also treats Yanlaifeng (a type of dermatological condition).

Huangbai Tang (Phellodendron Decoction): Huangbai, Huanglian, Baitouweng (Pulsatilla Root), Shengma (Cimicifuga Rhizome), Danggui, Muli (Oyster Shell), Shiliupi (Pomegranate Rind), Huangqin (Scutellaria Root), Jisheng (Taxillus Chinese), Zhigancao (Prepared Licorice Root) each 0.2 fen; Xijiao (Rhinoceros Horn), Aiye (Mugwort Leaf) each 0.1 fen. Coarsely crush the herbs, decoct in water, and drink. Used for treating pediatric dysentery with passage of red and white mucoid stools resembling fish brains, accompanied by headache and fever, or mental restlessness with high fever, and in warm diseases with excessive heat, where bloody stools resemble fish brains.