Therapeutic drug monitoring is a process that allows clinicians to qua
ntify and control drug therapy. Serum concentration data can be used t
o generate various pharmacokinetic and pharmacodynamic parameters. The
se parameters, in turn, can be used to optimize the doses used for ind
ividual patients. The goal is to provide enough drug to obtain a thera
peutic response without overt toxicity. The specific application of th
is process to the antimycobacterial drugs is reviewed.