天门冬曝干，捣下筛，食后服方寸匕，日三，可至十服。小儿服尤良，蜜丸服之益善，
唯多弥佳。
又方 天门冬捣取汁，微火煎，取五斗，下白蜜一斗，胡麻炒为末二升，合煎，搅勿
息手，可丸即止火，下大豆黄末，和为饼，径三寸，浓半寸，一服一枚，日三，百日以上得
益，此方最上、妙包众方。一法酿酒服，始伤多无苦，多即吐去病也。（方见第十六卷小肠
腑门。）蒯道人年近二百，而少常告皇甫隆云∶但取天门冬，去心皮，切，干之，酒服方寸
匕，日三，令人不老，补中益气，愈百病也。久服令人长生，气力百倍，治虚劳绝伤，年老
衰损羸瘦，偏枯不遂，风湿不仁，冷痹心腹积聚，恶疮痈疽肿癞疾，重者周身脓坏，鼻柱败
烂，服之皮脱虫出，颜色肥白。此无所不治，亦治阴痿、耳聋、目暗。久服白发黑，齿落生，
延年益命，入水不濡。服二百日后，恬泰疾损拘急者缓，羸劣者强，三百日身轻，三年走及
奔马，又三年心腹痼疾皆去。
生地五十斤捣，绞取汁，澄去滓，微火上煎，减过半，纳白蜜五升，枣脂一升，搅令
相得可丸乃止。每服如鸡子一枚，日三，令人肥白。
又方 地黄十斤细切，以醇酒二斗渍三宿出，曝干，反复纳渍，取酒尽止，加甘草、巴
戟
强力无病延年。
作熟干地黄法∶
采地黄，去须、叶及细根，捣绞取汁以渍肥者，着甑中，蒸之一时出，曝燥，更纳汁中
又蒸，至汁尽止，曝干之。亦可直切蒸之半日，数以酒洒之，使周匝至夕出，曝干，可捣蜜
丸服之。
种地黄法∶
先择好地黄赤色虚软者，深耕之，腊月逆耕冻地弥好。择肥大好地黄根切，长四五分至
一二寸许，一斛可种一亩。二三月种之，作畦畔相去一尺，生后随锄壅，数耘之，至九月十
月，视其叶小衰乃掘取，一亩得二十许斛。择取大根水净洗，其细根乃剪头尾辈，亦洗取之，
日曝令极燥，乃以竹刀切长寸余许蒸之，从旦至暮，当黑不尽黑者，明日又择取蒸之，先时
已捣其细碎者取汁，铜器煎之如薄饴，遂以地黄纳汁中，周匝出，曝干又纳，汁尽止，率百
斤，生者令得一二十斤。取初八月九月中掘者，其根勿令太老，强蒸则不消尽，有筋脉。初
以地黄纳甑中时，先用铜器承其下，以好酒淋地黄上，令匝汁后下入器中，取以并和煎汁佳。
将天门冬晒干，捣碎后过筛，饭后服用一方寸匕大小的药量，每天三次，最多可服至十次。小儿服用效果尤其好，用蜂蜜制成丸剂服用更佳，剂量稍大些也无妨。
另一个方子：将天门冬捣烂取汁，用微火煎煮，浓缩至五斗，加入白蜜一斗、炒熟磨成末的胡麻二升，混合在一起继续煎煮，手中要不断搅拌，直到能搓成丸子时即可停止加热，再加入大豆黄卷的粉末，调和做成饼状，直径三寸，厚度半寸，每次服用一枚，每天三次，服用一百天以上可见功效，此方最为上乘，妙处涵盖众多方剂。另一种方法是酿酒服用，刚开始如果剂量稍多也不会感到痛苦，多了就会呕吐，这是排出病邪的表现。（此方见第十六卷小肠腑门。）蒯道人年龄接近两百岁，他常告诉皇甫隆说：只要取天门冬，去掉心部和外皮，切片，晒干，用酒送服一方寸匕，每天三次，能让人不衰老，补益中气，治愈各种疾病。长期服用能使人长生不老，力气增加百倍，治疗虚劳和严重外伤，年老体衰消瘦，半身不遂，风湿导致的肌肤麻木，冷痹以及心腹部的积聚症，恶疮、痈疽、肿毒、癞疾等重症导致全身化脓溃烂，鼻梁塌陷腐烂，服用后皮肤脱落，虫体排出，面色变得丰润洁白。此方能治疗多种疾病，也能治疗阳痿、耳聋、视力模糊。长期服用能使白发变黑，落齿重生，延年益寿，甚至入水不湿。服用二百天后，原本安逸舒适但患有疾病拘挛急迫的人会缓解，瘦弱的人会变得强壮；三百天后身体轻盈；三年后奔跑速度如奔马；再经过三年，心腹部的顽固疾病都会消除。
生地黄五十斤，捣碎，绞取汁液，澄清去除渣滓，用微火煎煮，减少一半以上，加入白蜜五升、枣脂一升，搅拌使其融合，能搓成丸子即可停止。每次服用如鸡蛋大小的一枚，每天三次，能让人肌肉丰满、面色白皙。
另一个方子：地黄十斤，细细切碎，用两斗优质酒浸泡三个晚上后取出，晒干，反复浸泡直至酒被吸尽为止，加入甘草、巴戟天，具有增强体力、无病延年之效。
制作熟干地黄的方法：
采集地黄，去掉须根、叶片及细根，捣碎绞取汁液用来浸泡肥大的地黄块茎，放入甑中蒸一个时辰后取出，晒干，再次放入汁液中蒸煮，直到汁液耗尽为止，最后晒干。也可以直接切片蒸半天，多次洒上酒，使其均匀湿润，到傍晚取出，晒干，可以捣碎后用蜂蜜制成丸剂服用。
种植地黄的方法：
先挑选颜色赤红、质地虚软的好地黄，深耕土地，腊月里翻耕冻土更好。选取肥大好的地黄根切成段，长度约四五分至一二寸左右，一斛种子可种植一亩地。在二月或三月种植，做畦垄排列，株距保持一尺，生长后随时锄草培土，多次耘田除草，到九月十月，看到叶子稍微枯萎时就挖掘收获，一亩地可得二十多斛。挑选大的根茎用清水洗净，细小的根茎剪去头尾部分，也清洗收集起来，日晒至极度干燥，然后用竹刀切成一寸多长的段进行蒸制，从早晨到傍晚，应当蒸得发黑但不完全焦黑，第二天再挑选出来蒸制。之前已经捣碎的细根取其汁液，用铜器煎煮如稀薄的饴糖状，然后将地黄放入汁液中，反复浸渍取出，晒干后再放入，直到汁液耗尽为止，通常一百斤鲜地黄能得到二十到三十斤成品。选择农历八月或九月挖掘的地黄，根部不要过于老硬，过度蒸制则无法完全消解，会有筋脉残留。最初将地黄放入甑中时，先在下面放置铜器承接，用好酒淋在地黄上，让汁液流下进入容器中，取这些汁液与煎好的汁液混合使用效果更好。
Dry *Asparagi Radix* (Tianmendong, 天门冬) in the sun, pound it into powder, and sieve it. Take one *cunbi* (a square-inch measure of medicine) after meals, three times a day; up to ten doses may be taken. It is particularly beneficial for children; taking it as honey-pills is even better, and a slightly larger dose is preferable.
Another prescription: Pound fresh *Asparagi Radix* to extract the juice, simmer gently over low fire until reduced to five *dou*, then add one *dou* of white honey and two *sheng* of finely ground, stir-fried *Sesami Fructus* (Huma, 胡麻). Continue simmering while stirring constantly without stopping hands. When the mixture can be formed into pills, remove from heat. Add powdered *Sojae Semen Praeparatum* (Dadouhuang, 大豆黄卷), mix well, and form into cakes with a diameter of three *cun* and thickness of half a *cun*. Take one cake per dose, three times a day. Benefits will be evident after more than one hundred days. This prescription is superior, its excellence encompassing many others. Another method involves brewing it into wine for consumption. Initially, taking a slightly large dose causes no discomfort; excessive intake leads to vomiting, which expels disease. (See Volume XVI, Section on Small Intestine Fu Organ.) Ku Dao-ren, aged nearly two hundred, often told Huangfu Long: "Simply take *Asparagi Radix*, remove the heart and skin, slice, dry, and take one *cunbi* with wine, three times a day. It prevents aging, tonifies the Middle Jiao and Qi, and cures myriad diseases." Long-term use promotes longevity, increases strength a hundredfold, treats deficiency consumptive disorders and severe injuries, frailty and emaciation due to old age, hemiplegia and immobility, numbness due to wind-dampness, cold bi-patterns, and accumulations in the heart and abdomen. For malignant sores, carbuncles, swellings, and leprosy where severe cases involve whole-body pus and decay or collapse of the nasal bridge, taking this herb causes shedding of dead skin and expulsion of parasites, resulting in a plump and fair complexion. It treats almost all conditions, including impotence, deafness, and dim vision. Long-term use turns white hair black, regrows fallen teeth, extends life, and renders the body impervious to water soaking. After two hundred days of use, those who were comfortable but suffered from disease-induced spasms will find relief, and the weak will become strong. After three hundred days, the body feels light. After three years, one can run as fast as a galloping horse. After another three years, chronic internal diseases are eliminated.
Pound fifty *jin* of fresh *Rehmanniae Radix* (Shengdihuang, 生地黄), squeeze out the juice, clarify it by removing dregs, simmer gently over low fire until reduced by more than half. Add five *sheng* of white honey and one *sheng* of jujube fat, stir until fully incorporated, then stop when it can be formed into pills. Take one pill the size of a chicken egg, three times a day. It makes the person plump and fair-skinned.
Another prescription: Cut ten *jin* of *Rehmanniae Radix* finely, soak in two *dou* of strong wine for three nights, then remove and dry. Repeat the soaking and drying process until the wine is fully absorbed. Adding *Glycyrrhizae Radix et Rhizoma* (Gancao, 甘草) and *Morinda Officinalis Radix* (Bajitian, 巴戟天) enhances physical strength, ensures freedom from disease, and promotes longevity.
Method for preparing cooked dried *Rehmanniae Radix*:
Harvest *Rehmanniae Radix*, remove rootlets, leaves, and fine roots. Pound and squeeze to extract juice. Use this juice to soak large rhizomes. Place them in a steamer (zeng) and steam for one shichen (two hours), then remove and dry. Return them to the juice and steam again until the juice is exhausted. Finally, dry thoroughly. Alternatively, slice directly and steam for half a day, sprinkling with wine repeatedly to ensure even moistening. Remove in the evening, dry, pound, and form into honey-pills for consumption.
Method for cultivating *Rehmanniae Radix*:
First, select good quality *Rehmanniae Radix* that is reddish in color and soft in texture. Plow the land deeply; plowing frozen soil in the twelfth lunar month is especially good. Select large, healthy rhizomes, cut them into segments approximately four to five fen to one or two cun long. One hu of planting material can cover one mu of land. Plant in the second or third lunar months. Form ridges with one chi spacing between plants. As they grow, weed and hill up soil frequently. By the ninth or tenth lunar months, when the leaves begin to wither, dig up the harvest. One mu yields approximately twenty hu. Select large roots, wash thoroughly with clean water. Trim the tips and tails of smaller roots and wash them as well. Sun-dry until extremely dry. Slice into segments slightly longer than one cun using a bamboo knife. Steam from morning until evening; they should turn dark but not completely charred. The next day, select and steam again. Previously, the crushed fine roots were squeezed for juice, which was boiled in a copper vessel until thick like thin malt syrup. Then, place the *Rehmanniae Radix* into the juice, remove, dry, and repeat until the juice is exhausted. Generally, one hundred jin of fresh root yields twenty to thirty jin of processed product. Harvest in the eighth or ninth lunar months; avoid overly mature roots, as excessive steaming prevents complete decomposition and leaves fibrous veins. When initially placing the *Rehmanniae Radix* in the steamer, place a copper vessel underneath to catch the liquid. Pour good wine over the radish so that the liquid flows down into the vessel. Collect this liquid and mix it with the decoction juice for best results.