Moxalactam pharmacokinetics during hemodialysis.

To establish dosage recommendations, moxalactam elimination kinetics were studied in six anephric patients during hemodialysis and in four anephric patients during the interdialytic period. After a single 1-g intravenous bolus injection, moxalactam elimination half-life was 18.0 plus or minus 0.6 h with a volume of distribution of 20.2 plus or minus 3.6 liters and a plasma clearance of 12.8 plus or minus 2.0 ml/min in four nondialyzed patients. Moxalactam elimination half-life was decreased to 2.7 plus or minus 0.2 h during hemodialysis in six patients. After 4 h, 48.5% of the dose was recovered in the dialysate. The maintenance dose of moxalactam should be decreased to 15% of a normal dose in patients with creatinine clearances less than 10 ml/min, and 50% of a loading dose should be given after hemodialysis.