Chapter 9

Antimicrobial Therapeutic Drug Monitoring

Rim W. Rafeh, Kamilia Abdelraouf, Nisrine Haddad, Nesrine Rizk and Ahmed F. El-Yazbi


Therapeutic Drug Monitoring (TDM) is the art of measuring the levels of a therapeutic agent in body fluids, most commonly plasma, and interpreting the results in order to adjust dosing such that therapeutic benefit is maximized and toxic effects are prevented. With respect to antibiotics, TDM was traditionally viewed as a method to curtail the side effects of agents with narrow therapeutic indices. However, with improved understanding of pharmacokinetic differences in various patient populations, TDM is evolving to a method by which to ensure adequate benefit in patients whose pharmacokinetic status is in question. Moreover, the ever-increasing surge in antimicrobial-resistant organisms is calling for this practice once more, this time to ensure that drug concentrations are maintained sufficiently large in order to combat infections with such organisms. This book chapter details the use of TDM in different patient populations and for different antimicrobials, with emphasis on how reference PK/PD parameters and drug levels are determined.

Total Pages: 263-297 (35)

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