胃主生气，脾主运动。脾胃一虚，则谷气不充，脾愈无所禀。脾运四肢，既禀气有亏，则
四肢倦怠无力以动，故困乏而嗜卧也。亦有食饱过伤，以致脾难运化，每食饱后，则困倦
而瞌睡。此则食后暂有之，消化之后则不然也。若此者，当补脾胃而兼之消导可也。若是脾胃
俱虚，饮食少进，形气衰弱，常常倦怠者，当大补脾胃，以滋其化源，而克伐消导之剂则又
不可轻用轻犯也。久久滋补，脾胃一健，而精神斯足矣，何倦怠之有哉？
丹溪云∶有因脾胃受湿，沉困无力，倦怠嗜卧者，用二陈、苍白术、六君子汤之类为主，
本兼虚者，升阳除湿汤之属。
肥人倦怠，多是气虚有痰，宜四君、二陈加苍术之类及益胃汤。瘦人是热，黄芩、白术之
类。饮食太过转运不及者，宜加味保和丸及和中汤之属。
脉沉微无力者为虚倦怠。右关脉细濡者属湿。右关脉弦者有食积，脉滑大者属痰火怠惰。
（仁斋）加味保和丸 治食饱后即倦怠嗜卧。（方见脾胃门。）
六君子汤、二陈汤（俱见前。）
（东垣）益胃汤 治头闷，劳动则微痛，不喜饮食，四肢倦怠，烦躁短气，口不知味，
肠鸣大便微溏黄色，身体昏闷，口干不喜饮冷。
人参 黄 （各五分） 苍术 白术（各一钱） 陈皮 半夏 升麻 柴胡（各六分）
当归 黄芩 甘草 益智仁（各五分）
上水盏半煎八分，食前稍热服。忌生冷硬物酒面。
生姜和中汤 治食不下，口干虚渴，四肢倦怠。
人参（八分） 苍术 白术（各一钱） 陈皮 葛根 升麻 柴胡 本 羌活（各五分）
生黄芩（一钱） 酒黄（五分） 生甘草 炙甘草（各三分）
上水二盏，生姜五片、枣二枚，煎一盏，食前稍热服。
升阳除湿汤 治脾胃虚弱，不思饮食，肠鸣腹痛，泄泻无度，小便黄，四肢困倦。
陈皮 半夏 茯苓 甘草 麦芽 猪苓 泽泻（各五分） 益智仁 神曲 防风 羌活
升麻（各三分） 苍术（制，一钱）
上水二盏，姜三片、枣一枚，煎一盏，空心服。
The Stomach governs the generation of vital Qi, and the Spleen governs transportation and transformation. When the Spleen and Stomach are deficient, the Qi from grain and food fails to fill the body, leaving the Spleen further deprived of its source. The Spleen distributes Qi to the four limbs; since the received Qi is deficient, the four limbs become fatigued and weak, unable to move, thus resulting in lassitude and a desire to sleep. There are also cases where excessive eating injures the Spleen, making it difficult for the Spleen to transform and transport; after every full meal, one feels sleepy and drowsy. This condition occurs temporarily after eating and resolves after digestion. For such cases, one should tonify the Spleen and Stomach while simultaneously employing methods to promote digestion and resolve stagnation. If both the Spleen and Stomach are deficient, with reduced food intake, decline in form and Qi, and constant fatigue, one must strongly tonify the Spleen and Stomach to nourish their source of transformation; at this time, purgative or digestive agents should not be used lightly or rashly. After prolonged tonification, once the Spleen and Stomach become robust, spirit and energy will naturally suffice, and there will be no fatigue.
Danxi stated: In cases where dampness invades the Spleen and Stomach, causing heaviness, weakness, lassitude, and somnolence, formulas such as Er Chen Tang (Two-Cured Decoction), Cang Zhu (Atractylodis Rhizoma), Bai Zhu (Atractylodis Macrocephalae Rhizoma), and Liu Jun Zi Tang (Six-Gentlemen Decoction) should be used as the main prescription. If deficiency is inherent, formulas like Sheng Yang Chu Shi Tang (Raise Yang and Dispel Dampness Decoction) may be employed.
In obese individuals, lassitude is often due to Qi deficiency accompanied by phlegm; Si Jun Zi Tang (Four-Gentlemen Decoction), Er Chen Tang (Two-Cured Decoction) added with Cang Zhu (Atractylodis Rhizoma), and Yi Wei Tang (Benefit the Stomach Decoction) are suitable. In thin individuals, it is often due to heat; Huang Qin (Scutellariae Radix) and Bai Zhu (Atractylodis Macrocephalae Rhizoma) are suitable. For those whose excessive diet leads to inadequate transportation and transformation, Jia Wei Bao He Wan (Modified Preserve Harmony Pill) and Zhong He Tang (Harmonize the Middle Decoction) are appropriate.
A pulse that is deep, faint, and forceless indicates deficiency-related lassitude. A fine and soggy pulse at the Right Guan position indicates dampness. A wiry pulse at the Right Guan position indicates food retention; a slippery and large pulse indicates lethargy due to phlegm-fire.
(Ji Renzhai) Jia Wei Bao He Wan (Modified Preserve Harmony Pill): Treats lassitude and somnolence immediately after overeating. (Formula seen in the Spleen and Stomach section.)
Liu Jun Zi Tang (Six-Gentlemen Decoction), Er Chen Tang (Two-Cured Decoction) (Both seen previously.)
(Dongyuan) Yi Wei Tang (Benefit the Stomach Decoction): Treats head stuffiness, slight pain upon exertion, aversion to food, four-limb lassitude, irritability, shortness of breath, loss of taste, borborygmus, slightly loose yellow stools, bodily heaviness, dry mouth without desire for cold drinks.
Ren Shen (Ginseng Radix), Huang Qi (Astragali Radix) (each 5 fen); Cang Zhu (Atractylodis Rhizoma), Bai Zhu (Atractylodis Macrocephalae Rhizoma) (each 1 qian); Chen Pi (Citri Reticulatae Pericarpium), Ban Xia (Pinelliae Rhizoma), Sheng Ma (Cimicifugae Rhizoma), Chai Hu (Bupleuri Radix) (each 6 fen); Dang Gui (Angelicae Sinensis Radix), Huang Qin (Scutellariae Radix), Gan Cao (Glycyrrhizae Radix et Rhizoma), Yi Zhi Ren (Alpiniae Oxyphyllae Fructus) (each 5 fen).
Add one and a half cups of water, decoct to obtain eight-tenths of a cup. Take warm before meals. Avoid raw, cold, hard foods, alcohol, and wheat products.
Sheng Jiang Zhong He Tang (Fresh Ginger Harmonize the Middle Decoction): Treats inability to swallow food, dry mouth with false thirst, and four-limb lassitude.
Ren Shen (Ginseng Radix) (8 fen); Cang Zhu (Atractylodis Rhizoma), Bai Zhu (Atractylodis Macrocephalae Rhizoma) (each 1 qian); Chen Pi (Citri Reticulatae Pericarpium), Ge Gen (Puerariae Lobatae Radix), Sheng Ma (Cimicifugae Rhizoma), Chai Hu (Bupleuri Radix), Ben Cao (Ligustici Chuanxiong Rhizoma), Qiang Huo (Notopterygii Rhizoma et Radix) (each 5 fen); Sheng Huang Qin (Scutellariae Radix) (1 qian); Jiu Huang Qi (Astragali Radix prepared with wine) (5 fen); Sheng Gan Cao (Glycyrrhizae Radix et Rhizoma), Zhi Gan Cao (Glycyrrhizae Radix et Rhizoma prepared with honey) (each 3 fen).
Add two cups of water, five slices of fresh ginger, and two dates. Decoct to obtain one cup. Take warm before meals.
Sheng Yang Chu Shi Tang (Raise Yang and Dispel Dampness Decoction): Treats Spleen and Stomach weakness, lack of appetite, borborygmus and abdominal pain, unceasing diarrhea, yellow urine, and four-limb heaviness.
Chen Pi (Citri Reticulatae Pericarpium), Ban Xia (Pinelliae Rhizoma), Fu Ling (Poria), Gan Cao (Glycyrrhizae Radix et Rhizoma), Mai Ya (Hordei Fructus Germinatus), Zhu Ling (Polyporus), Ze Xie (Alismatis Rhizoma) (each 5 fen); Yi Zhi Ren (Alpiniae Oxyphyllae Fructus), Shen Qu (Massa Medicata Fermentata), Fang Feng (Saposhnikoviae Radix), Qiang Huo (Notopterygii Rhizoma et Radix), Sheng Ma (Cimicifugae Rhizoma) (each 3 fen); Cang Zhu (Atractylodis Rhizoma, processed) (1 qian).
Add two cups of water, three slices of ginger, and one date. Decoct to obtain one cup. Take on an empty stomach.