Methods:Different concentration of solutions of Cefetamet Pivoxil was given to the experimental mice,then the maximum tolerant dose,with Bliss method,and LD 50 by ip were determined.

• 方法 :给实验小鼠灌服不同浓度的盐酸头孢他美酯溶液 ,测定小鼠灌胃最大耐受量 ,采用Bliss法测定小鼠腹腔注射半数致死量 (LD50 )。