槟榔（二钱） 浓朴（一钱） 草果仁（五分） 知母（一钱） 芍药（一钱） 黄芩（一钱） 甘草（五分）
上用水二盅，煎八分，午后温服。
吴又可曰∶槟榔能消能磨，除伏邪，为疏利之药，又除岭南瘴气。浓朴破戾气所结，草果辛烈气雄，除伏邪蟠踞。
三味协力直达其巢穴，使邪气溃散，速离募原，是以名为达原饮也。热伤津液，加知母以滋阴，热伤营血，加芍
药以和血，黄芩清燥热之余，甘草为和中之用，以后四味，乃调和之品，如渴与水，非拔病之药也。凡疫邪游溢诸经
当随经引用，以助升泄。如胁痛耳聋，寒热呕而口苦，此邪热溢于
少阳经也，本方加柴胡一钱，如腰背项痛，此邪热溢于太阳经也，本方加羌活一钱。如目痛眉棱骨痛，眼眶痛，鼻
干不眠，此邪热溢于阳明经也，本方加葛根一钱。但证有迟速轻重不等，药有多寡缓急之分，务在临时斟酌，所定
分两，大略而已，不可执滞。
槟榔 草果 浓朴 芍药 甘草 知母 黄芩 大黄 葛根 羌活 柴胡 生姜 大枣为引。
郑素圃曰∶按三阳加法，不必全用，各随其所见之经而加用之。
Binglang (Arecae Semen, 槟榔) (2 qian), Nongpo (Magnoliae Officinalis Cortex, 厚朴) (1 qian), Caoguoren (Tsaoko Fructus, 草果仁) (0.5 qian), Zhimu (Anemarrhenae Rhizoma, 知母) (1 qian), Shaoyao (Paeoniae Radix Alba, 白芍) (1 qian), Huangqin (Scutellariae Radix, 黄芩) (1 qian), Gancao (Glycyrrhizae Radix et Rhizoma, 甘草) (0.5 qian).
Take the above herbs, add two zhong of water, decoct until eight fen remains, and take warm in the afternoon.
Wu Youke stated: Binglang has the functions of resolving accumulation and grinding stagnation, eliminating latent pathogenic factors, and is a drug for dredging and promoting free flow; it can also eliminate miasma in Lingnan. Nongpo breaks up the clumping of perverted qi (li qi), and Caoguo, with its pungent, acrid, and vigorous aroma, eliminates latent pathogens entrenched within.
These three herbs work together to reach the nest of the pathogen directly, causing the pathogenic factor to disperse and quickly leave the Mu Yuan (Membrane Source), hence the name Da Yuan Yin (Reach the Origin Decoction). When heat injures body fluids, Zhimu is added to nourish yin; when heat injures Ying blood, Shaoyao is added to harmonize blood; Huangqin clears residual dry-heat, and Gancao serves to harmonize the Middle Jiao. The latter four ingredients are harmonizing agents, akin to giving water to one who is thirsty, rather than drugs that eradicate the disease root. Whenever epidemic pathogens overflow into various meridians, one should follow the meridian indications to assist in ascending and venting. For example, if there is hypochondriac pain, deafness, alternating chills and fever, vomiting, and bitter taste in the mouth, this indicates pathogenic heat overflowing into the Shao Yang Meridian (Shaoyang Disease); add Chaihu (Bupleuri Radix, 柴胡) 1 qian to this formula. If there is pain in the lower back, upper back, and neck, this indicates pathogenic heat overflowing into the Tai Yang Meridian (Taiyang Disease); add Qianghuo (Notopterygii Rhizoma et Radix, 羌活) 1 qian to this formula. If there is eye pain, pain in the supraorbital ridge, orbital pain, dry nose, and insomnia, this indicates pathogenic heat overflowing into the Yang Ming Meridian (Yangming Disease); add Gegen (Puerariae Lobatae Radix, 葛根) 1 qian to this formula. However, conditions vary in speed and severity, and medications differ in quantity and urgency; one must always exercise discretion at the time of treatment. The specified dosages are merely approximate and should not be applied rigidly.
Binglang, Caoguo, Nongpo, Shaoyao, Gancao, Zhimu, Huangqin, Dahuang (Rhei Radix et Rhizoma, 大黄), Gegen, Qianghuo, Chaihu, Shengjiang (Zingiberis Rhizoma Recens, 生姜), and Dazao (Jujubae Fructus, 大枣) serve as guiding herbs.
Zheng Supu stated: Regarding the additions for the Three Yang meridians, it is not necessary to use them all; each should be used according to the specific meridian affected.
Dahuang (5 qian), Nongpo (1 qian), Zhishi (Aurantii Fructus Immaturus, 枳实) (1 qian), Mangxiao (Natrii Sulfas, 芒硝).
Decoct with water and ginger and take orally. Reduce the dosage by half for frail individuals; reduce each ingredient by half again for mild pathogens.
Dahuang (5 qian), Nongpo (1 qian), Zhishi (1 qian).
Decoct with water and ginger and take orally.