The present invention relates to an herbal extract and the use thereof for manufacturing drugs to treat or inhibit breast cancer condition in a subject in need thereof, wherein the herbal extract contains Kansui Radix, Rheum rhabarbarum, Paeonia lactiflora, Jiangbanxia (pinelliae rhizoma praeparatum), and Zhigancao (glycyrrhizae radix et rhizoma). The condition includes breast cancer cell proliferation and invasion.本發明係關於一種中草藥萃取物用於製備治療或抑制一個體之乳癌病症之藥物的用途，其中該中草藥包含甘遂、大黃、芍藥、姜半夏、及炙甘草。該乳癌病症包括乳癌細胞增殖及侵襲。
