苦，温。入足太阴经气分。流气活血。治风劳心腹疼痛。配香附、乌药、陈皮、炙甘草，
等
分为末，治妊妇水肿。配片子姜黄、制半夏，治痰注臂痛。同麻黄，治伤寒发汗。同大黄，
堕胎气。
治湿气，姜汁炒。行气利水，酒拌炒。气血虚者禁用。
（水草类七种）
畏海蛤、文蛤。忌铁。
甘、淡、微咸。入足太阳、少阴经气分。走膀胱，开气化之源。通水道，降肺金之气。
去脬
垢，疗尿血，止淋沥，收阴汗，消肿胀，除泻痢。凡痘疮小便赤涩者，用此为宜。配白术，
治支饮。配薇衔、白术，治酒风。
健脾，生用或酒炒用。滋阴利水，盐水炒。多服昏目。肾虚者禁用。
怪症∶口鼻中气出。盘旋不散，凝如黑盖，过十日，渐至胸肩，与肉相连，坚胜金石，
无由
饮食，多因疟后得之。用泽泻煎服三碗，连服四五日，自愈。
小便不通，用泽泻之类利之。岂知膀胱癃秘，有不一而治者。如肺气虚，虚则气上逆，
逆则
溺短而涩，病在上焦气分，用茯苓、泽泻、车前理水之上源，则下便自利。若火邪烁于肺金
，心火移于小肠而小水不利，宜黄芩、麦冬之品清之。有膀胱本寒，虚则为热，病在下焦血
分而溺水不通，宜用知、柏去膀胱之热，桂心开水道之窍。有肾水亏而阴火下降，尿管涩、
茎中痛者，宜二地、二冬，滋阴补肾以利之。再有宿垢结于大肠，大便不通，致小便不行者
，但当通其大便，则小水不治而自利。泽泻、车前，更为不宜。淡渗之剂，宁容概施乎。
Bitter, warm. Enters the Qi level of the Foot-Taiyin (Spleen) Meridian. Promotes Qi circulation and invigorates blood. Treats wind-lao pain in the heart and abdomen. Combined with Cyperi Rhizoma (Xiangfu), Linderae Radix (Wuyao), Citri Reticulatae Pericarpium (Chenpi), and Glycyrrhizae Radix et Rhizoma Preparata with Honey (Zhi Gancao), ground into powder in equal parts, treats edema in pregnant women. Combined with Curcumae Longae Rhizoma Prepared (Pian Jianghuang) and Pinelliae Rhizoma Preparata (Zhi Banxia), treats arm pain due to phlegm accumulation. With Ephedrae Herba (Mahuang), treats sweating in Shanghan (Cold Damage). With Rhei Radix et Rhizoma (Dahuang), induces abortion. For dampness, stir-fry with ginger juice. To promote Qi movement and diuresis, stir-fry with wine mixed. Contraindicated for those with Qi and Blood deficiency.
(Water plant category, seven species)
Averse to Arca Testa (Haige) and Arcan Testa (Wenge). Avoid iron. Sweet, bland, slightly salty. Enters the Qi level of the Foot-Taiyang (Bladder) and Foot-Shaoyin (Kidney) Meridians. Travels to the Bladder, opening the source of Qi transformation. Unblocks water passages, descends the Qi of Metal-Lung. Removes bladder sediment, treats hematuria, stops dribbling urination,收敛s genital sweating, reduces swelling, eliminates diarrhea and dysentery. For cases of acne with red and scanty urine, this is appropriate. Combined with Atractylodis Macrocephalae Rhizoma (Baizhu), treats Zhi Yin (fluid retention under the ribs). Combined with Glechomae Herba (Weixian) and Baizhu, treats Jiufeng (wind caused by alcohol). To strengthen the Spleen, use raw or stir-fried with wine. To nourish Yin and promote diuresis, stir-fry with salt water. Overuse causes blurred vision. Contraindicated for Kidney deficiency.
Strange syndrome: Qi emanating from the mouth and nose. Swirling without dissipating, condensing like a black cover. After ten days, gradually spreads to the chest and shoulders, connecting with flesh, harder than metal and stone, unable to eat or drink, often occurring after malaria. Use Alismatis Rhizoma (Zexie) decoction, three bowls, taken continuously for four to five days, self-heals. For urinary obstruction, use Zexie-like herbs to promote urination. But one must know that Bladder longmi (urinary retention) has various treatments. If Lung Qi is deficient, deficiency leads to rebellious Qi; rebellion leads to short and difficult urination. The disease is in the Upper Jiao Qi level. Use Poria (Fuling), Zexie, and Plantaginis Semen (Cheqian) to regulate the upper source of water, then lower urination will naturally flow. If Fire pathogen scorches Lung Metal, and Heart Fire transfers to the Small Intestine causing difficult urination, use Scutellariae Radix (Huangqin) and Ophiopogonis Tuber (Maidong) to clear it. There are cases of original Cold in the Bladder, where deficiency generates Heat; the disease is in the Lower Jiao Blood level, causing water drowning and obstruction. Use Anemarrhenae Rhizoma (Zhimu) and Phellodendri Cortex (Huangbai) to remove Bladder Heat, and Cinnamomi Ramulus (Guixin) to open water passages. There are cases of Kidney Water deficiency with descending Yin Fire, causing urethral roughness and penile pain. Use Rehmanniae Radix Preparata (Shu Dihuang) and Sheng Dihuang (collectively Er Di), and Ophiopogonis Tuber (Maidong) and Asparagi Tuber (Tian Dong) (collectively Er Dong) to nourish Yin and tonify the Kidney to promote urination. Furthermore, if old fecal matter accumulates in the Large Intestine, causing constipation which leads to urinary obstruction, one should only unblock the large intestine, then small water will flow without specific treatment. Zexie and Cheqian are even more unsuitable here. How can bland-draining agents be applied indiscriminately?