tokens: Group 1 ( P alone ) received P , 360 mg / day , for 15 days ; Group II ( P + gentamicin ); Group III ( gentamicin alone ) and Group IV ( mild DM + gentamicin ). Nephrotoxic doses ( 40 mg / kg body wt / day ) of gentamicin were injected during the last nine days of study to the animals of groups II to IV .