The peritoneal clearance of gentamicin was studied in 11 chronic uremic patients who undergoing intermittent peritoneal dialysis. Gentamicin was significantly removed by peritoneal dialysis with a clearance value of 9.75 +/- 3.78 ml/min. The serum half life was 14.08 +/- 3.57 hr, a value significantly less than that of non dialysed end stage renal disease patients. The mean apparent volume of distribution of the drug in these patients was about 27% of body weight. The derived value for gentamicin peritoneal clearance and volume of distribution can be used to calculate maintenance dose during intermittent peritoneal dialysis. In order to achieve the peak level of 8 micrograms/ml, supplementary dose compensated for the loss during peritoneal dialysis is approximately 40% of loading dose 0.8 mg/kg every 12 hours.