治太阳病反下之。因而腹满时痛者。
桂枝（三两） 芍药（六两） 甘草（二两） 生姜（三两） 大枣（十二枚）
上五味。以水七升。煮取三升。去滓。分温三服。
治太阳病反下之。因而大实痛者。
即前方加大黄。（二两。）
歌曰 桂枝倍芍转输脾。泄满升邪止痛宜。大实痛因反下误。黄加二两下无疑。
述 桂枝加芍药汤。倍用芍药之苦降。能令桂枝深入于至阴之分。举误陷之邪。而腹痛
自止
道。去实满。枣、草助转输。使其邪悉从外解下行。各不相背。
论云。少阴之为病。脉微细。但欲寐也。此以少阴标本水火阴阳之气。见于脉证者为提
纲也
神
或在于表。或在于里。或在于经。或归于中土。俱明神机枢转上下出入之至理。故其方亦寒
热攻补表里之不同。
治少阴病始得之。反发热。脉沉者。此方主之。
麻黄（二两） 细辛（二两） 附子（一枚 炮。）
上三味。以水一斗。先煮麻黄。减二升。去上沫。内诸药。煮取三升。去滓。温服一升。
日
歌曰 麻黄二两细辛同。附子一枚力最雄。始得少阴反发热。脉沉的证奏奇功。
蔚按。少阴病始得之。是当无热。而反发热。为太阳标阳外呈。脉沉为少阴之生气不升。
恐阴阳内外不相接。故以熟附子助太阳之表阳而内合于少阴。麻黄、细辛启少阴之水阴而外
合于太阳。须知此汤非发汗法。乃交阴阳法。
Treats Taiyang disease (Taiyang syndrome) where purgation was incorrectly applied. Consequently, abdominal fullness and intermittent pain occur.
Guizhi Tang (Cinnamon Twig Decoction) with added Shaoyao: Guizhi (Cinnamomi Ramulus, 3 liang), Shaoyao (Paeoniae Radix, 6 liang), Gancao (Glycyrrhizae Radix et Rhizoma, 2 liang), Shengjiang (Zingiberis Rhizoma Recens, 3 liang), Dazao (Jujubae Fructus, 12 pieces).
Take the above five herbs. Boil in 7 sheng of water. Reduce to 3 sheng. Remove dregs. Divide into three warm doses.
Treats Taiyang disease where purgation was incorrectly applied. Consequently, severe abdominal fullness and pain (da shi tong) occur.
Add Dahuang (Rhei Radix et Rhizoma, 2 liang) to the previous formula.
Song says: Doubling Shaoyao in Guizhi Tang aids spleen transport. It is suitable for draining fullness, raising pathogenic factors, and relieving pain. Severe pain results from erroneous purgation. Adding two liang of Dahuang for downward purging is unquestionable.
Explanation: In Guizhi Jia Shaoyao Tang (Guizhi Decoction plus Paeonia), the bitter descending nature of doubled Shaoyao allows Guizhi to penetrate deeply into the extreme yin levels. It lifts the pathogenic factor trapped by error, and abdominal pain naturally ceases.
Dao: Removing excess fullness. Dazao and Gancao assist transport, ensuring the pathogenic factor resolves completely from the exterior or descends. The actions of each herb do not contradict one another.
The Treatise states: The hallmark of Shaoyin disease (Shaoyin syndrome) is a faint and fine pulse, and only desiring sleep (dan yu mei). This serves as the outline based on the Shaoyin jing-biao fire-water yin-yang qi manifesting in pulse and symptoms.
Shen: The pathogen may be in the exterior, interior, meridians, or return to the central earth (spleen/stomach). All clarify the profound principle of Shen-jing pivot transformation and upward-downward entry-exit. Thus, its formulas vary in cold-heat, attack-tonify, and exterior-interior approaches.
Treats Shaoyin disease at its onset, where fever appears contrary to expectation, and the pulse is deep. This formula governs this condition.
Mahuang (Ephedrae Herba, 2 liang), Xixin (Asari Radix et Rhizoma, 2 liang), Fuzi (Aconiti Lateralis Radix Praeparata, 1 piece, processed).
Take the above three herbs. Boil in 1 dou of water. First boil Mahuang, reducing by 2 sheng. Remove the foam on the surface. Add other herbs. Boil to obtain 3 sheng. Remove dregs. Take 1 sheng warm.
Song says: Two liang of Mahuang with Xixin. One piece of Fuzi has the most potent force. Onset of Shaoyin disease with contrary fever. Deep pulse confirms the indication, achieving miraculous efficacy.
Wei's Commentary: At the onset of Shaoyin disease, there should be no fever. Contrary fever indicates the outward manifestation of Taiyang biao-yang. A deep pulse indicates that the vital qi of Shaoyin fails to ascend.
One must fear that yin and yang, interior and exterior, fail to connect. Therefore, prepared Fuzi assists Taiyang biao-yang to internally merge with Shaoyin. Mahuang and Xixin awaken Shaoyin shui-yin to externally merge with Taiyang. Note that this decoction is not a sweating method, but a method of harmonizing yin and yang.