Objective:To observe the LD_ 50 ,stimulation and the effect on isolated intestine,vagina and uteri of rabbit of BMA and BMB produced in Guangxi Guilin region.Methods:LD_ 50 was calculated by modified method.The tension changes of intestine,vagina and uteri of rabbit were recorded by the isolated device of smooth muscle before and after the drug administration.Results:LD_ 50 of BMA and BMB were 6606mg/kg and 4467 mg/kg,respectively.No any stimulation was found in conjunctive of rabbit in both BMA and BMB gro...