With the current rise in multiresistant gram-negative bacteria, carbapenems are more frequently used. Surprisingly, limited data exist on the pharmacokinetics of meropenem in peritoneal dialysis (PD)-related peritonitis. We report on the pharmacokinetics of repeated intraperitoneal (IP) meropenem during 21 days as treatment for polymicrobial multiresistent PD-related peritonitis.Our current report supports daily doses of 125 mg/L intraperitoneal meropenem in all bags as an effective and safe modality in the treatment of PD-associated peritonitis with multiresistant microorganisms. No signs of over- or underdosing were found based on serial drug concentration measurements at fixed time points up to 21 days.

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