紫苏 香附（二两） 橘皮（一两） 甘草（五钱）
感冒风寒，头痛发热，目病，而无六经之证可求者，此
方主之。
南方风气柔弱，伤于风寒，俗称感冒。感冒者，受邪肤浅之名也。经曰∶卑下之地，春风常存。故东南之区，
人感风证居多。所感之气，由鼻而入，实于上部，客于皮肤，故无六经形症。只紫苏、香附、橘皮之辛芬，疏邪
理气，甘草之甘平，和中辅正，前症随痊。
枳梗二陈汤加芎 、紫苏、柴胡、干葛。
六气袭人，深者为中，其次为伤，轻则为感冒。今人外有头痛，发热恶寒，内有吐痰，咳嗽，气汹情状，此
感冒微兼伤中者也。今用芎、苏、柴、葛以解表，表解则头痛、发热、恶寒愈矣。枳桔二陈以和里，里和则咳嗽、
吐痰、气汹除矣。
仍即枳桔二陈加参、苏、前胡、木香、干葛。
外感内伤，发热头痛，呕逆泄泻，痰塞咳嗽，眩晕嘈烦，此方主之。
发热头痛，外感也。余症内伤也。外感宜解表，故用葛、苏、前胡。内伤宜补中，故用参、苓、术、草。其
木香、枳、橘、枯梗、半夏，辛苦燥湿，清芬行滞，既足正乖异之气，又以破痰饮之积，是大有助于前药也。元
戎谓此方治一切发热皆效，或然。谓更入四物名茯苓补心汤，尤能治虚热及吐衄便血，言过其实。
诗曰∶参苏饮药是橘皮，甘草前胡枳桔俱，苓葛木香陈半夏，内伤外感用无虞。参前木去芎柴入，饮号芎苏
治亦如。香苏散反广橘草，六经无症暂施之。
Zi Su (Perillae Folium), Xiang Fu (Cyperi Rhizoma, 2 liang), Ju Pi (Citri Reticulatae Pericarpium, 1 liang), Gan Cao (Glycyrrhizae Radix et Rhizoma, 5 qian).
This formula is indicated for colds caused by wind-cold invasion, presenting with headache, fever, and eye diseases, where there are no specific manifestations of the Six Channels (Taiyang disease, Yangming disease, Shaoyang disease, Taiyin disease, Shaoyin disease, Jueyin disease) to guide diagnosis.
In the southern regions, the climatic qi is gentle and weak; when invaded by wind-cold, it is commonly referred to as "gan mao" (cold/flu). "Gan mao" implies that the pathogenic factor invades superficially. The Classics state: "In low-lying areas, spring wind often persists." Therefore, in the southeastern regions, people are more prone to wind-related disorders. The invading qi enters through the nose, accumulates in the upper body, and lodges in the skin and cou-li (interstices of skin and muscles); thus, typical Six Channel syndromes are absent. Only the pungent and aromatic properties of Zi Su, Xiang Fu, and Ju Pi are used to disperse pathogens and regulate qi, while the sweet and neutral nature of Gan Cao harmonizes the middle jiao and supports healthy qi, leading to the recovery from the aforementioned symptoms.
Add Xiong (Chuanxiong Rhizoma), Zi Su, Chai Hu (Bupleuri Radix), and Gan Ge (Puerariae Lobatae Radix) to Zhi Jie Er Chen Tang (Magnetoliae Bud and Citri Exocarpium Decoction combined with Two Aged Ingredients Decoction).
When the Six Qi (Wind, Cold, Summerheat, Dampness, Dryness, Fire) invade humans, deep invasion is termed "zhong" (stroke/severe attack), moderate is "shang" (injury), and mild is "gan mao". Currently, patients present externally with headache, fever, and aversion to cold, and internally with expectoration, coughing, and rapid breathing. This represents a mild gan mao complicated by shang syndrome. Now, Xiong, Zi Su, Chai Hu, and Gan Ge are used to resolve the exterior; once the exterior is resolved, headache, fever, and aversion to cold will subside. Zhi Jie Er Chen Tang is used to harmonize the interior; once the interior is harmonized, coughing, expectoration, and rapid breathing will be eliminated.
Still use Zhi Jie Er Chen Tang, adding Shen (Ren Shen, Ginseng Radix), Zi Su, Qian Hu (Peucedani Radix), Mu Xiang (Aucklandiae Radix), and Gan Ge.
This formula is indicated for conditions involving both external contraction and internal injury, presenting with fever, headache, vomiting and regurgitation, diarrhea, phlegm obstruction with coughing, dizziness, and epigastric discomfort with irritability.
Fever and headache belong to external contraction. The remaining symptoms belong to internal injury. External contraction should be treated by resolving the exterior, hence Gan Ge, Zi Su, and Qian Hu are used. Internal injury should be treated by tonifying the middle, hence Shen, Ling (Fu Ling, Poria), Zhu (Bai Zhu, Atractylodis Macrocephalae Rhizoma), and Gan Cao are used. The Mu Xiang, Zhi (Zhi Shi, Immature Bitter Orange), Ju (Ju Pi, Tangerine Peel), Jing (Jie Geng, Platycodon Root), and Ban Xia (Pinelliae Tuber) possess bitter and pungent properties to dry dampness; their clear fragrance moves stagnation. They not only correct abnormal qi within but also break up phlegm-fluid accumulation, greatly assisting the previous herbs. Yuan Rong stated that this formula is effective for all types of fever, which may be true. However, claiming that adding Si Wu Tang (Four Substances Decoction) to create Fu Ling Bu Xin Tang (Poria Tonifying Heart Decoction) makes it especially effective for deficiency heat, hematemesis, epistaxis, and hematochezia is an exaggeration.
The poem states:
Shen Su Yin contains Ju Pi, along with Gan Cao, Qian Hu, Zhi Ke, and Jie Geng;
Ling, Ge, Mu Xiang, Chen Pi, and Ban Xia ensure safety in treating internal and external injuries.
Remove Xiong and Chai Hu, add Shen, Qian Hu, and Mu Xiang;
The drink is named Xiong Su Yin, and its therapeutic effect is similar.
Xiang Su San reverses this by using Guang Ju Pi and Gan Cao,
Temporarily applied when there are no Six Channel symptoms.