Pharmacokinetics of metronidazole in patients undergoing peritoneal dialysis.

After a single 500-mg intravenous dose of metronidazole, plasma and dialysate levels were measured over a 7.5-h period in five patients undergoing peritoneal dialysis for terminal renal failure. Approximately 10% of this dose was removed by dialysis during that period, and therapeutic levels were maintained in plasma. No routine adjustment in the dosage of metronidazole appears necessary in patients undergoing peritoneal dialysis.