Bu Zhong Yi Qi Tang () is a Chinese classic herbal formula. In Japanese kampo, it is known as "Hochà «-ekki-tà Â" ( (it is also known as Kampo #41). It is commonly made into Chinese patent medicine.
The formula was created by LàDà Âng-yuán (). It was published in "Treatise on the Spleen and Stomach" () in 1249.
There are many variations of the formula proportions. Each maker of Chinese patent medicine changes the proportions of the herbs slightly. The proportions are standardized in the Japanese kampo formula, however. Some herbs may be changed also. For example, rén shÃÂn (ginseng root) may be replaced with dÃÂng shÃÂn ("poor man's ginseng").
The formula was also changed slightly when it was borrowed as a Japanese kampo formula. Some Chinese species of herbs were replaced with herbs found in Japan. For example, bái zhú (Atractylodes macrocephala) was replaced with cÃÂng zhú (Atractylodes lancea).