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大黄因其性寒,气香味苦。入气分苦以通泄、降泄、清泄、燥湿;入血分则凉血、活血、解毒,故有泻下攻积、泻火解毒、活血祛瘀、利胆退黄之功。因其归大肠、脾、胃、心、肝经,既入气分又入血分。入足阳明胃、足太阴脾、足厥阴肝、手少阳心包经、手阳明大肠经。能入血分,通经脉而破一切瘀血,其力沉而不浮,以攻决为用,下各种症瘕积聚。因其气香,故兼入气分,少用之亦能调气。能下心中热痰以愈疯狂,降肠胃热实以通燥结,其香窜透窍之力又善利小便。其性趋下而善清在上之热,故目痛齿痛,用之皆为要药。又善治疮疡热毒。因其性能降胃热及胃气,故善治吐血、衄血。《本经》谓其能推陈出新,因此有黄良之名。因而大黄临床应用与它各种炮制方法是密不可分。
Rhubarb because of its cold, bitter flavor and gas. Into the gas points to Tong vent, drop vent, clear vent, dampness; into the blood points are cooling blood, blood circulation, detoxification, it has diarrhea Xiandao plot, purging fire detoxification, blood stasis, gallbladder Huang back to power. Because of the large intestine, spleen, stomach, heart, liver, both into the gas into the blood points. Into the foot Yangming stomach, foot spleen, foot Jue Yin liver, hand Shaoyang pericardium, hand Yangming colon by. Into the blood points, pass through the pulse and break all the blood stasis, the force Shen instead of floating to attack for use, under the accumulation of various symptoms. Because of its aroma, so the integration of gas points, less use can also tune gas. The heart of the phlegm to the more crazy, real stomach heat descending dry junction, the fragrant channeling the power of insight and good urine urine. Its sexual tendency and good on the heat, so head eyes toothache, the use of all drugs. Good cure sore heat poison. Because of its performance down stomach heat and stomach gas, so good rule hematemesis, blood. “The Scriptures” that it can introduce new ideas, so there Huangliang name. Therefore, clinical application of rhubarb and its various processing methods are inseparable.