治少阴伤寒，自利不渴，呕哕不止；或吐利俱发，小便不利；或汗出过多，脉
微欲绝，腹痛胀满，手足冷；及一切虚寒厥冷。凡病伤寒，有此证候，皆由阳气虚有寒，虽
更觉头痛体疼，发热恶寒，四肢拘急，表里悉具者，未可攻表，宜先服此药以助阳救里。
甘草(炙，一分） 干姜（二钱，炮) 附子(炮去皮脐，半两)
上锉散。每服五钱匕，水一盏半，煎七分，去滓，食前服。强人，加干姜一钱；或恶寒
脉微而利，利止仍亡血者，加人参半两；或发汗，若下之，病仍不能解，烦躁者，仍加茯苓
半两；面赤者，加连须葱九茎；腹中痛者，去葱，加芍药一两；呕者，加生姜一两；咽痛者
，去芍药，加桔梗半两。
桂枝、麻黄，皆攻太阳经表药，方各见太阳经，其如阳明、太阴、少阳、厥阴，并可于
风寒二方论中，随证施治。
阴毒为病，手足冷，腰背强，头疼腹痛，或烦渴，精神恍惚，额与手背，时出冷汗，音
声郑重，爪甲面色青黑，多因脾肾虚寒伏阴，重感于寒所致。
治阴毒伤寒，唇青面黑，身重强，四肢冷；或因服冷药过度，心腹胀满，昏沉不识人。
附子(炮去皮脐，三分） 桂心（半两） 当归 白术（各半两） 半夏(汤洗去滑) 干姜（各一分，炮)
上为末。每服三钱，水二盏，生姜三片，煎六分，不以时热服，衣覆取汗。
Treat Shaoyin (Lesser Yin) cold damage, presenting with spontaneous diarrhea without thirst, and continuous vomiting or hiccups; or simultaneous vomiting and diarrhea with inadequate urination; or excessive sweating, a pulse that is faint and nearly imperceptible, abdominal pain and distension, and cold extremities; as well as all cases of deficiency-cold leading to cold reversal. In any case of cold damage, if these syndromes are present, they are caused by deficiency of Yang Qi and the presence of Cold. Even if there are concurrent headache, body ache, fever, aversion to cold, and stiffness/contraction of the four limbs, indicating both exterior and interior involvement, one should not attack the exterior prematurely. Instead, it is appropriate to first administer this formula to assist Yang Qi and rescue the interior.
Gancao (Zizhi, 1 fen) Ganjiang (2 qian, processed) Fuzi (processed, skin and umbilicus removed, 0.5 liang)
Crush into a powder. Take 5 qian bi per dose, with 1.5 zhan of water, decoct to 0.7 zhan, remove dregs, and take before meals. For robust individuals, add 1 qian of Ganjiang; if there is aversion to cold, a faint pulse, and diarrhea, and the diarrhea stops but blood loss persists, add 0.5 liang of Renshen; if after sweating or purging therapies the disease remains unresolved accompanied by irritability, still add 0.5 liang of Fuling; if the face is red, add 9 stalks of Congbai (with roots); if there is abdominal pain, remove Congbai and add 1 liang of Shaoyao; if there is vomiting, add 1 liang of Shengjiang; if there is sore throat, remove Shaoyao and add 0.5 liang of Jiegeng.
Guizhi and Mahuang are both herbs that attack the exterior of the Taiyang (Greater Yang) channel. Their formulas are detailed in the Taiyang channel sections. As for syndromes involving the Yangming (Yang Brightness), Taiyin (Lesser Yin), Shaoyang (Lesser Yang), and Jueyin (Terminal Yin) channels, treatment can be administered according to specific manifestations within the discussions on Wind-Cold formulas.
Yindu (Yin Toxin) disease presents with cold extremities, rigidity of the waist and back, headache and abdominal pain, or irritability and thirst, mental confusion, occasional cold sweat on the forehead and dorsum of hands, heavy/dull voice, cyanosis of nails and complexion. It is mostly caused by deficiency-cold of the Spleen and Kidney with latent Yin pathogenic factors, compounded by re-exposure to Cold.
Treat Yindu cold damage, presenting with cyanotic lips and blackish complexion, heavy/rigid body, and cold extremities; or due to excessive intake of cold-natured medicines causing epigastric and abdominal fullness, lethargy, and inability to recognize people.
Fuzi (processed, skin and umbilicus removed, 3 fen) Guixin (0.5 liang) Danggui Baizhu (each 0.5 liang) Banxia (washed in hot water to remove slipperiness) Ganjiang (each 1 fen, processed)
Grind into powder. Take 3 qian per dose, with 2 zhan of water and 3 slices of Shengjiang, decoct to 0.6 zhan. Take warm at any time, cover with clothing to induce sweating.