补腰膝
甘温能补，微辛能润。色紫入肝经气分。润肝燥，补肝虚。子能令母实，故兼补肾。肝
充则筋健，肾充则骨强，能使筋骨相着（皮中有丝，有筋骨相着之象）。
治腰膝酸痛（经曰∶腰者肾之府，转移不能，肾将惫矣；膝者筋之府，屈伸不能，筋将
惫矣。一少年新娶，得脚软病，且痛甚，作香港脚治，不效。孙林曰∶此肾虚也。用杜仲一两
，半酒半水煎服，六日全愈。按∶腰痛不已者，属肾虚；痛有定处，属死血；往来走痛，属
痰；腰冷身重、遇寒即发，属寒湿；或痛或止，属湿热，而其原多本于肾虚，以腰者肾之府
也），阴下湿痒，小便余沥，胎漏（怀孕沥血）胎坠（惯坠胎者，受孕一、两月，用杜仲八
两，糯米煎汤浸透，炒断丝，续断二两，酒浸，山药六两，为糊丸，或枣肉为丸，米饮下。
二药大补肾气，托住胎元，则胎不坠）。
出汉中。浓润者良。去粗皮锉，或酥炙、酒炙、蜜炙，盐酒炒、姜汁炒，断丝用。恶黑
参。
平补肝肾
甘苦而平。少阴之精，隆冬不雕。益肝肾，安五脏，强腰膝，明耳目，乌髭发，补风虚
，除百病（女贞酒蒸，晒干，二十两，桑椹干十两，旱莲草十两，蜜丸，治虚损百病。如四
月即捣桑椹汁，七月即捣旱莲汁，和药，不必用蜜。时珍曰∶女贞子上品妙药，古方罕用何
哉）。
女贞、冬青，《本草》作二种，实一物也。冬至采佳。酒蒸用（近人放蜡虫于此树）。
补益腰膝
味甘性温能够补益，微带辛味能够滋润。颜色紫黑入肝经的气分。能滋润肝燥，补益肝虚。子脏（肾）能令母脏（肝）充实，所以兼有补肾的作用。肝气充足则筋脉强健，肾气充足则骨骼坚固，能使筋骨紧密相连（皮中有丝状物，呈现出筋骨相连的景象）。
治疗腰膝酸痛（《内经》说：腰部是肾脏的府邸，如果转动转移困难，说明肾脏将要衰败；膝盖是筋脉的府邸，如果屈伸不利，说明筋脉将要衰败。有一个少年刚结婚，得了脚部软弱无力的病，而且疼痛剧烈，按香港脚（痛风或下肢肿痛类疾病）治疗，没有效果。孙林说：这是肾虚。用杜仲一两，半酒半水煎服，六天完全痊愈。按语：腰痛不止的，属于肾虚；疼痛位置固定的，属于瘀血；疼痛游走不定的，属于痰湿；腰部发冷身体沉重、遇寒即发的，属于寒湿；时痛时止的，属于湿热，但其根源多本于肾虚，因为腰部是肾脏的府邸），阴部潮湿瘙痒，小便淋漓不尽，胎漏（怀孕期间阴道少量出血），胎坠（习惯性流产者，受孕一两个月时，用杜仲八两，糯米煎汤浸透，炒去丝，续断二两，酒浸，山药六两，制成糊丸，或用枣肉做丸，米饮送下。这两味药大补肾气，托住胎元，那么胎儿就不会坠落）。
产于汉中。质地浓厚润泽的为好。去掉粗皮切碎，或者用酥油炙、酒炙、蜜炙，盐酒炒、姜汁炒，需去除丝状物使用。忌与黑参同用。
平补肝肾
味甘苦而性平。是少阴肾精所化，隆冬时节也不凋零。补益肝肾，安定五脏，强壮腰膝，明亮耳目，使胡须头发变黑，补益风虚，消除百病（女贞子酒蒸，晒干，二十两，桑椹干十两，旱莲草十两，炼蜜为丸，治疗虚损引起的各种疾病。如果在四月就捣取桑椹汁，七月就捣取旱莲汁，混合药物，不必用蜜。李时珍说：女贞子是上等的妙药，古方中很少使用，为什么呢？）。
女贞和冬青，《本草》记载为两种，实际上是同一种植物。冬至日采收为佳。用酒蒸后使用（近代人在这种树上养殖蜡虫）。
Tonify the Waist and Knees
Sweet in taste and warm in nature, it can tonify; slightly pungent, it can moisten. Its purple color enters the Qi level of the Liver Meridian. It moistens Liver dryness and tonifies Liver deficiency. Since the "child" organ (Kidney) can strengthen the "mother" organ (Liver), it also has the effect of tonifying the Kidney. When the Liver is sufficient, the sinews become strong; when the Kidney is sufficient, the bones become firm, enabling the sinews and bones to adhere closely (there are silk-like fibers within the skin, presenting a phenomenon of sinew-bone adhesion).
It treats soreness and pain of the waist and knees (The *Neijing* states: The waist is the mansion of the Kidney; if movement and turning are difficult, the Kidney is about to fail. The knee is the mansion of the sinews; if flexion and extension are impaired, the sinews are about to fail. A young man who had just married suffered from weakness in his legs with severe pain. He was treated for Hong Kong Foot [a term historically referring to gout or lower limb swelling/pain conditions], but without effect. Sun Lin said: This is Kidney deficiency. Use one liang of Eucommia Bark, decocted with half wine and half water, and he recovered completely in six days. Note: Persistent low back pain belongs to Kidney deficiency; fixed-point pain belongs to dead blood [blood stasis]; wandering pain belongs to phlegm; cold waist with heavy body, triggered by cold, belongs to cold-dampness; intermittent pain belongs to damp-heat, but its root often lies in Kidney deficiency, as the waist is the mansion of the Kidney]. It treats dampness and itching in the genital area, dribbling after urination, fetal leakage [scanty vaginal bleeding during pregnancy], and habitual abortion [for those prone to miscarriage, at one or two months of conception, use eight liang of Eucommia Bark, soaked through in rice porridge decoction, stir-fried until the silk fibers break, two liang of Dipsacus Root soaked in wine, six liang of Dioscorea Rhizome, made into paste pills or date-meat pills, taken with rice drink. These two herbs greatly tonify Kidney Qi, supporting the fetal origin, so the fetus will not fall].
It originates from Hanzhong. Those that are thick and moist are superior. Remove the coarse bark and chop, or process with su [animal fat], wine, honey, salt-wine stir-fry, or ginger juice stir-fry. Must be processed to remove the silk fibers. Adverse to Black Shen [Polygonum multiflorum prepared in a specific way].
Gently Tonify the Liver and Kidney
Sweet and bitter in taste, neutral in nature. It is the essence of the Shaoyin [Kidney], remaining un-withered even in deep winter. It benefits the Liver and Kidney, calms the Five Zang Organs, strengthens the waist and knees, brightens the eyes and ears, darkens the beard and hair, tonifies wind-deficiency, and eliminates hundred diseases [Eucommia Bark steamed with wine, dried, twenty liang; Mulberry Fruit dried, ten liang; Eclipta Herba, ten liang; made into honey pills to treat various diseases caused by deficiency and damage. If mulberry juice is crushed in April and Eclipta juice in July, mix with the medicine, no need to use honey. Li Shizhen said: Eucommia Bark is a supreme miraculous drug, why is it rarely used in ancient prescriptions?].
Eucommia [Nvzhen] and Wintergreen [Dongqing], recorded as two species in the *Bencao*, are actually the same plant. Best harvested at the Winter Solstice. Processed by steaming with wine [In modern times, scale insects are raised on this tree].