An investigation has been performed to monitor cephalexin in blood, urine and feces of rats following administration of its derivative N-benzoyl-cephalexin. Female Wistar rats were randomly divided into two groups of six animals. To the first group N-benzoyl cephalexin (equivalent to cephalexin 25 mg/kg) was given orally in 10 percent PVP suspension to the fasted rats. Blood samples (200 ul) we…