温中益气。
甘微苦温。有小毒，温中益气，多食令人闷。一名狸豆。（豆作狸首文、故名。）以上菽
豆
类。
宣、解表除烦。
苦泄肺。寒胜热。（藏器曰∶豆性生平、炒熟热、煮食寒、作豉冷。）发汗解肌。调中下气。
治伤寒寒热头痛。烦躁满闷。懊 不眠。发斑呕逆。凡伤寒呕逆烦闷、宜引吐、不宜用下药
以
子豉汤、能吐虚烦。血痢温疟。疫气瘴气。（豆经蒸罨、能升能散、
吐、得酒则治风、得薤则治
痢、得蒜则止血、炒熟又能止汗、孟诜治
用代麻黄汤、通治伤寒发表、亦治酒病。
）伤寒直中三阴与传入阴经者勿用。热结胸烦闷。宜下不宜汗。亦忌之。造豉法、用黑豆。
六月间水浸一宿。淘净蒸熟、摊芦席上。微温。蒿覆五六日后。黄衣遍满为度。不可太过。
取晒簸净。水拌干湿得所。以汁出指间为准。筑实瓮中。桑叶浓盖三寸。泥封。晒七日。取
出曝一时。又水拌入瓮。如是七次。再蒸过。摊去火气。瓮收。
一名豆 。理胃消水。
甘平。除胃中积热。消水病胀满。破妇人恶血。疗湿痹筋挛膝痛。黑大豆为 牙。生五寸长
。便干之。名为黄卷。用之熬过。服食所须。一法、壬癸日以井华水浸大豆。候生芽。取皮
阴干。（小儿撮口、初生豆芽、研烂绞汁、和乳灌少许、良。）
温中益气。
味甘、微苦，性温，有小毒，能温补中焦、益气，但多食会导致胸闷。又名狸豆。（因其豆荚形状像狸猫的头，所以得名。）以上属于菽豆类药材。
宣散表邪，解除表证，消除烦闷。
味苦能泄肺气，寒性能胜热邪。（唐代本草学家藏器说：大豆生时性平，炒熟后性热，煮食性寒，制成豆豉则性冷。）能发汗解肌，调和脾胃，降逆下气。
治疗伤寒引起的寒热往来、头痛、烦躁、胸满胸闷、心中懊恼不眠、发斑、呕吐逆气。凡是伤寒引起的呕吐逆气、烦闷，适宜用催吐法，不宜使用泻下药。栀子豉汤，能吐出虚烦。治疗血痢、温疟、疫气、瘴气。（豆豉经过蒸制和覆盖发酵，具有升散的作用，遇酒可治风病，遇薤白可治痢疾，遇大蒜可止血，炒熟又能止汗，孟诜用它代替麻黄汤，通治伤寒发表，也能治疗饮酒过度之病。）伤寒直中三阴经或传入阴经者禁用。热结胸膈导致的烦闷，适宜用泻下法而不宜用发汗法，也忌用豆豉。制作豆豉的方法：用黑豆。在六月间用水浸泡一夜，淘洗干净后蒸熟，摊在芦席上。待温度微温时，用蒿草覆盖五六天，直到表面长满黄色菌衣为止，不可过度发酵。取出后晒簸干净，用水拌湿，以干湿适度、汁液从指间渗出为准。将处理好的豆子压实放入瓮中，用厚厚的桑叶覆盖三寸厚，再用泥封口。晒七天，取出暴晒一时辰，再用水拌湿放入瓮中，如此重复七次。最后再蒸一次，摊开散去火气，收存于瓮中。
又名大豆黄卷。能理胃、消水。
味甘，性平。能清除胃中积热，消除水病引起的胀满，破除妇人恶血，治疗湿痹、筋脉拘挛、膝痛。黑大豆发芽，生长到五寸长，大便干燥时采收，名为黄卷。使用时需熬过，作为服食所需。另一种方法：在壬癸日（属水的日子）用井华水浸泡大豆，等待生出芽来，取豆皮阴干。（小儿撮口风，初生的豆芽，研烂绞汁，与乳汁混合灌服少许，效果良好。）
Warms the middle and supplements qi.
Sweet, slightly bitter, warm in nature, with slight toxicity; it warms the middle jiao and supplements qi, but excessive consumption causes chest fullness. Also known as Li Dou (Cat Bean). (Named so because the pod resembles the head of a cat.) The above belong to the category of Soybeans (Shu Dou).
Disperses the exterior, resolves the exterior syndrome, and relieves irritability.
Bitter flavor drains Lung Qi; cold nature overcomes heat. (Zang Xing said: Soybeans are neutral when raw, hot when stir-fried, cold when boiled, and cold when made into fermented soybean paste [Douchi].) It induces sweating and releases the muscle layer, harmonizes the middle jiao, and directs qi downward.
Treats chills and fever, headache, irritability, chest fullness, mental restlessness with insomnia, eruption of macules, vomiting, and regurgitation caused by Cold Damage (Shanghan). For Cold Damage presenting with vomiting, regurgitation, irritability, and fullness, emesis is indicated, while purgatives should be avoided. Zhizi Chi Tang (Gardenia and Fermented Soybean Paste Decoction) can induce vomiting for empty irritability. Treats bloody dysentery, warm malaria, epidemic qi, and miasma. (Fermented soybean paste, after steaming and incubation, has ascending and dispersing properties; mixed with wine, it treats wind disorders; mixed with Allium macrostemon, it treats dysentery; mixed with garlic, it stops bleeding; when stir-fried, it stops sweating. Meng Shen used it as a substitute for Mahuang Tang to generally treat the release of the exterior in Cold Damage, and also to treat alcohol-induced illness.) It is contraindicated in Cold Damage that directly invades the Three Yin meridians or transmits into the Yin meridians. For heat binding in the chest causing irritability and fullness, purgation is indicated rather than sweating, and Douchi is also contraindicated. Method for making Douchi: Use black soybeans. In June, soak overnight in water, rinse clean, and steam until cooked. Spread on reed mats. When slightly warm, cover with mugwort herbs for five to six days until covered with yellow mold, but do not over-ferment. Take out, sun-dry, and winnow clean. Moisten with water to the correct degree of dryness and wetness, determined when juice exudes between fingers. Pack tightly into a jar. Cover thickly with mulberry leaves to a depth of three cun, seal with mud, and expose to the sun for seven days. Take out, expose to sunlight for one shichen (two hours), moisten with water again, and return to the jar. Repeat this process seven times. Finally, steam once more, spread out to dissipate heat, and store in a jar.
Also known as Da Dou Huang Juan (Yellow Sprouts of Soybeans). Regulates the stomach and eliminates water retention.
Sweet, neutral in nature. Clears accumulated heat in the stomach, reduces distension and fullness due to water diseases, breaks up evil blood in women, and treats damp bi syndrome, tendon spasms, and knee pain. Black soybeans sprouted to a length of five cun, harvested when stools are dry, are named Huang Juan. They must be roasted before use, as required for dietary therapy. Another method: On Ren-Gui days (days associated with Water element), soak soybeans in fresh well water until they sprout. Take the bean skins and dry them in the shade. (For neonatal trismus [lockjaw], grind fresh soybean sprouts into a paste, squeeze out the juice, mix with milk, and administer a small amount orally; this is effective.)