Clinical Applications of Therapeutic Drug Monitoring in Optimizing Drug Therapy and Improving Patient Outcomes

Abstract

Therapeutic Drug Monitoring (TDM) is an essential clinical tool used to measure drug concentrations in biological fluids to optimize pharmacotherapy. It is particularly valuable for drugs with a narrow therapeutic index, significant pharmacokinetic variability, or complex pharmacodynamic relationships. TDM helps clinicians individualize dosing regimens, maximize therapeutic efficacy, minimize toxicity, and improve patient outcomes. The application of TDM is widely recognized in the management of antimicrobial therapy, antiepileptic drugs, immunosuppressants, cardiovascular drugs, and psychiatric medications. Advances in analytical techniques such as high-performance liquid chromatography (HPLC) and immunoassays have enhanced the accuracy and efficiency of drug monitoring. This review highlights the principles, clinical indications, analytical techniques, and therapeutic applications of TDM in modern clinical practice, emphasizing its role in personalized medicine and improved patient safety.