论曰肾气化则二阴通，肾气虚则气不传化，虚劳之人，肾气不足，气既不化，则膀胱不
利，而水道不宣，故小便难也。
治虚劳肾热，小便难，色如栀子汁，榆白皮汤方
榆白皮（三两锉） 滑石（二两） 黄芩（去黑心） 瞿麦穗 木通（锉各一两） 石
苇（拭去
上八味，粗捣筛，每服五钱匕，用水一盏半，煎至八分，去滓不拘时候温服。
治虚劳肾经有热，膀胱不通，大黄汤方
大黄（锉炒） 黄芩（去黑心各一两） 栀子仁（十四枚） 甘草（炙锉） 芒硝（各
半两）
上五味，粗捣筛，每服三钱匕，水一盏，煎至七分，去滓不拘时候温服，快利即止。
治肾气不足，客热内乘，小便难，羚羊角饮方
羚羊角（镑屑） 赤茯苓（去黑皮各一两） 木通（锉半两） 桑根白皮（锉） 生干
地黄（切
上六味，粗捣筛，每服五钱匕，水一盏半，煎至八分，去滓温服，不拘时。
治虚劳腰痛，少腹拘急，小便不利，八味肾气丸方
熟干地黄（焙八两） 山芋 山茱萸（各四两） 泽泻 赤茯苓（去黑皮） 牡丹皮（各
三两）
上八味，捣罗为末，炼蜜和丸，如梧桐子大，每服二十丸，温熟水下，不拘时。
治虚劳，补不足，宽中止痛，益气利小便，巨胜汤方
巨胜（炒三两） 甘草（炙锉） 麦门冬（去心焙） 芍药（各半两）
上四味，粗捣筛，每服五钱匕，以水一盏半，入生姜三片，地黄汁一合，煎至一盏，去
滓温服。
治虚劳，补不足，利小便，八灵散方
赤茯苓（去黑皮） 天门冬（去心焙干） 石菖蒲 椒红 泽泻 桂（去粗皮） 冬葵
子
白芥子（等分）
上八味，捣罗为散，每服二钱匕，温汤调下，不拘时。
It is stated that when Kidney Qi (Kidney Energy) is sufficient, the two yin orifices (the anterior and posterior openings) are unobstructed; when Kidney Qi is deficient, Qi fails to transmit and transform. In cases of Xu Lao (Deficiency Consumption), Kidney Qi is insufficient. Since Qi cannot undergo transformation, the Bladder (Zang-Fu organ responsible for urine storage and excretion) becomes dysfunctional, and the water passages fail to disseminate, resulting in difficult urination.
Yu Bai Pi Tang Decoction (Elm White Bark Decoction) for treating Xu Lao with Kidney Heat, difficult urination, and urine color resembling Gardenia juice:
Ulmi Cortex Albus (Bark of Ulmus davidiana var. japonica, 3 liang, crushed) Shihui (Talcum, 2 liang) Huangqin (Scutellariae Radix, remove black heart) Qumai (Herba Dianthi) Mutong (Caulis Akebiae, crushed, each 1 liang) Shiwei (Folium Pyrrosiae, wipe clean).
The above eight ingredients are coarsely pounded and sifted. Each dose consists of 5 qianbi, decocted in 1.5 zhan of water until reduced to 0.8 zhan. Strain and take warm at any time.
Dahuang Tang Decoction (Rhubarb Decoction) for treating Xu Lao with heat in the Kidney Meridian and obstruction of the Bladder:
Dahuang (Radix et Rhizoma Rhei, crushed and stir-fried) Huangqin (Scutellariae Radix, remove black heart, each 1 liang) Zhizi Ren (Semen Gardeniae, 14 pieces) Gancao (Radix Glycyrrhizae, honey-fried and crushed) Mangxiao (Natrii Sulfas, each 0.5 liang).
The above five ingredients are coarsely pounded and sifted. Each dose consists of 3 qianbi, decocted in 1 zhan of water until reduced to 0.7 zhan. Strain and take warm at any time. Discontinue once bowel movement is facilitated.
Lingyang Jiao Yin (Antelope Horn Drink) for treating insufficient Kidney Qi, internal invasion by pathogenic heat, and difficult urination:
Lingyang Jiao (Cornu Saigae Tataricae, shaved into flakes) Chifuling (Poria Cocos with Red Skin, remove black skin, each 1 liang) Mutong (Caulis Akebiae, crushed, 0.5 liang) Sangbaipipi (Cortex Morus Radicis, crushed) Sheng Dihuang (Rhizoma Rehmanniae Recens, sliced, 0.5 liang).
The above six ingredients are coarsely pounded and sifted. Each dose consists of 5 qianbi, decocted in 1.5 zhan of water until reduced to 0.8 zhan. Strain and take warm at any time.
Ba Wei Shen Qi Wan Pill (Eight-Ingredient Kidney Qi Pill) for treating Xu Lao with lower back pain, tension in the hypogastrium, and difficult urination:
Shu Dihuang (Rhizoma Rehmanniae Praeparata, baked, 8 liang) Shanyu (Fructus Corni) Shanzhuyu (Pericarpium Corni, each 4 liang) Zexie (Rhizoma Alismatis) Chifuling (Poria Cocos with Red Skin, remove black skin) Mudanpi (Cortex Moutan, each 3 liang).
The above eight ingredients are pounded and sieved into fine powder. Mix with refined honey to form pills the size of Sophora seeds. Take 20 pills per dose with warm boiled water at any time.
Jusheng Tang Decoction (Black Sesame Decoction) for treating Xu Lao, tonifying deficiency, relaxing the middle jiao to relieve pain, benefiting Qi, and promoting diuresis:
Jusheng (Sesamum Indicum, fried, 3 liang) Gancao (Radix Glycyrrhizae, honey-fried and crushed) Maidong (Radix Ophiopogonis, remove heart and bake) Shaoyao (Radix Paeoniae Alba, each 0.5 liang).
The above four ingredients are coarsely pounded and sifted. Each dose consists of 5 qianbi, decocted with 1.5 zhan of water, adding 3 slices of fresh ginger and 1 he of Rehmannia juice, until reduced to 1 zhan. Strain and take warm.
Ba Ling San Powder (Eight-Spirit Powder) for treating Xu Lao, tonifying deficiency, and promoting diuresis:
Chifuling (Poria Cocos with Red Skin, remove black skin) Tianmendong (Radix Asparagi) Shichangpu (Rhizoma Acori Tatarinowii) Jiaohong (Pericarpium Zanthoxyli) Zexie (Rhizoma Alismatis) Gui (Cinnamomi Cortex, remove rough bark) Dongkuizi (Semen Malvae) Baijiezi (Semen Sinapis Albae, equal parts).
The above eight ingredients are pounded and sieved into powder. Take 2 qianbi per dose, mixed with warm water, at any time.