酒浸蒸熟用。忌葱菜。
辛，苦，微寒，有毒。专截诸疟，最吐老痰。
生益州川谷及汉中。二八月采根。今汴西、湖南、淮、浙亦有之。而海州出者，叶似楸
叶，
八月有花红白色。又茎圆有节，高者三四尺。叶似茗而狭长，两两相当。二月生白花，青萼
。五月结实青圆。
常山苗也，八九月采之。
辛，苦，微温，有毒。治与常山略同。生用大剂则吐，熟用小剂则否，得大黄则泻。
温疟热多，常山、小麦、竹叶，水煎，五更服。（验方第一。）
牝疟寒多，蜀漆、云母、龙骨为末。发日平旦一服，发前一服。（第二。）
肾疟，四肢冷，腰脊痛，大便难，凄凄而寒，常山、香豉、竹叶、乌梅、葱白，水煎，
发前分服。（第三。）
肺疟，胸多痰，心寒，寒甚乃热，热间时惊。常山三钱，甘草五分，秫米三十五粒，水
煎，发前分服。（第四。）
肝疟，少腹满，喘息如死，或小便如脓，寒多热少，常山一两，醋浸一宿，瓦器焙干。
每二钱，水煎，五更服。（第
五。）
妊娠疟疾，常山、石膏、乌梅、甘草，酒浸一宿，平旦温服。（第六。）
积年久疟，常山、黄连每一两，酒浸一宿，发日早服，发前再服。热当吐，冷当利。（第
七。）
截诸疟汤，常山三两，水渍一宿，发前服，辄吐。（第八。）
截诸疟酒，常山一两，酒渍三日，平旦一服，发时一服。（第九。）
间日疟，常山、大黄、炙草，水煎，五更服，发时又服。（第十。）
久疟不止，常山、槟榔、丁香、乌梅，酒浸一宿，五更服之。（十一。）
胸中痰饮，常山、甘草，每一两，蜜水煎，辄吐，不吐再服。（十二。）
截疟常山丸 常山（二两）
鸡子百合丸豆大，煮熟晒干收之，每二十丸，竹叶汤下。五更一服，天明一服，发时一
服。
截疟黄丹丸 常山（二两） 黄丹（半两） 乌梅（一两）
糯米汤丸豆大，每三十丸，凉酒下。隔夜一服，平旦一服，午后方食。（第二。）
不二饮 常山（二钱） 槟榔（要一雄一雌大者） 贝母（二钱） 知母（二钱）
酒（一盅）
十分酒煎至剩八分，不可过熬，过则不效，露一宿。临发日五更温服。勿令妇人煎药。
治一
切新久疟疾，一剂截住，神效。（第三。）
Use after soaking in wine and steaming. Avoid consuming scallions and vegetables.
Pungent, bitter, slightly cold, toxic. Specifically used to arrest various types of malaria; most effective at inducing vomiting of old phlegm.
Grows in the valleys of Yizhou and Hanzhong. Roots are harvested in the second and eighth lunar months. Currently, it is also found in western Bianjing, Hunan, Huai River, and Zhejiang regions. Those from Haizhou have leaves resembling Catalpa leaves, with red and white flowers blooming in the eighth month. The stems are round with nodes, reaching three or four chi in height. The leaves resemble tea leaves but are narrower and longer, growing opposite each other. White flowers appear in the second lunar month with green calyxes. Green, round fruits mature in the fifth lunar month.
This is the sprout of Changshan (Dichroa Root), harvested in the eighth and ninth lunar months.
Pungent, bitter, slightly warm, toxic. Its therapeutic effects are similar to Changshan. When used raw in large doses, it induces vomiting; when processed and used in small doses, it does not; combined with Dahuang (Rhubarb Root), it causes purgation.
For Warm Malaria (Wen Nue) characterized by predominant heat, use Changshan (Dichroa Root), Xiaomai (Triticum Semen), and Zhuye (Bamboo Leaf). Decoct in water and take at Wugeng (3-5 AM). (Verified Formula No. 1.)
For Yin Malaria (Pin Nue) characterized by predominant cold, powder Shuqi (Dichroa Sprout), Yunmu (Cloud Mother), and Longgu (Fossilized Bones). Take one dose at dawn on the day of onset, and another dose before the onset. (No. 2.)
For Kidney Malaria, with cold limbs, lower back and spine pain, difficulty in defecation, and shivering chills, use Changshan (Dichroa Root), Xiangchi (Prepared Soybean), Zhuye (Bamboo Leaf), Wumei (Mume Fruit), and Congbai (Scallion White). Decoct in water and divide into doses taken before the onset. (No. 3.)
For Lung Malaria, with excessive phlegm in the chest, a sensation of cold in the heart, severe cold preceding heat, and palpitations during fever intervals, use Changshan (Dichroa Root) 3 qian, Gancao (Licorice Root) 5 fen, and Shumi (Sorghum Grain) 35 grains. Decoct in water and divide into doses taken before the onset. (No. 4.)
For Liver Malaria, with fullness in the lower abdomen, gasping as if dying, or urine resembling pus, predominant cold with slight heat, use Changshan (Dichroa Root) 1 liang. Soak in vinegar overnight, dry in a clay vessel. Take 2 qian per dose, decoct in water, and take at Wugeng (3-5 AM). (No. 5.)
For Malaria during pregnancy, use Changshan (Dichroa Root), Shigao (Gypsum Fibrosum), Wumei (Mume Fruit), and Gancao (Licorice Root). Soak in wine overnight and take warm at dawn. (No. 6.)
For chronic malaria lasting years, use Changshan (Dichroa Root) and Huanglian (Coptis Rhizome), 1 liang each. Soak in wine overnight. Take early on the day of onset, and again before the onset. For heat patterns, induce vomiting; for cold patterns, promote purgation. (No. 7.)
Decoction for Arresting All Malarial Fevers: Changshan (Dichroa Root) 3 liang. Soak in water overnight and take before the onset; it will likely induce vomiting. (No. 8.)
Wine for Arresting All Malarial Fevers: Changshan (Dichroa Root) 1 liang. Soak in wine for three days. Take one dose at dawn and one dose at the time of onset. (No. 9.)
For Every-Other-Day Malaria, use Changshan (Dichroa Root), Dahuang (Rhubarb Root), and Zhi Cao (Honey-fried Licorice Root). Decoct in water, take at Wugeng (3-5 AM), and take again at the time of onset. (No. 10.)
For persistent chronic malaria, use Changshan (Dichroa Root), Binglang (Areca Seed), Dingxiang (Caryophylli Flos), and Wumei (Mume Fruit). Soak in wine overnight and take at Wugeng (3-5 AM). (No. 11.)
For Phlegm-fluid retention in the chest, use Changshan (Dichroa Root) and Gancao (Licorice Root), 1 liang each. Decoct in honey-water; it usually induces vomiting. If no vomiting occurs, take again. (No. 12.)
Jie Nue Changshan Wan (Malaria-Arresting Changshan Pill): Changshan (Dichroa Root) 2 liang.
Form pills the size of chicken egg yolks. Boil until cooked, dry in the sun, and store. Take 20 pills per dose with Zhu Ye Tang (Bamboo Leaf Decoction). Take one dose at Wugeng (3-5 AM), one at dawn, and one at the time of onset.
Jie Nue Huangdan Wan (Malaria-Arresting Yellow Lead Pill): Changshan (Dichroa Root) 2 liang, Huangdan (Lithargyrum) 0.5 liang, Wumei (Mume Fruit) 1 liang.
Form pills the size of beans using Nuomi Tang (Glutinous Rice Decoction). Take 30 pills per dose with cool wine. Take one dose the night before, one at dawn, and eat only after noon. (No. 2.)
Bu Er Yin (Non-Two Drink): Changshan (Dichroa Root) 2 qian, Binglang (Areca Seed) (select one male and one female large ones), Beimu (Fritillaria Bulb) 2 qian, Zhimu (Anemarrhenae Rhizoma) 2 qian. Wine (1 zhong).
Decoct the wine until only 8/10 remains. Do not over-boil, as efficacy will be lost. Leave exposed overnight. Take warm at Wugeng (3-5 AM) on the day of onset. Do not let women prepare the medicine.
Treats all new and chronic malarial fevers; one dose arrests the disease with miraculous effect. (No. 3.)