Laboratory guidelines for monitoring of antimicrobial drugs. National Academy of Clinical Biochemistry

Few antimicrobial drugs meet the requirements for therapeutic drug monitoring. Those that are monitored include the aminoglycosides (gentamicin, tobramycin, and amikacin), chloramphenicol, and in some cases, vancomycin. For these drugs, there is evidence of a relationship between serum concentration, efficacy, and/or the incidence of adverse or toxic events. Monitoring begins with the appropriate timing of collection and continues through the analytical process to the integration of all data used to guide the clinician's next decision.

Published by Clinical chemistry, 1998. The guideline itself is at the source linked here.

pubmed.ncbi.nlm.nih.gov/9590397/