What is the Importance of Monitoring the plasma drug concentrations?

1 Compliance monitoring 2 Individualizing therapy – during early therapy and during dosage changes 3 Diagnosing under-treatment 4 Avoiding toxicity 5 Monitoring and detecting drug interactions 6 Guiding withdrawal of therapy - allow for the adjustment of the drug dosage - to individualize and optimize therapeutic drug regimens. - When there is alterations in physiologic functions, monitoring may provide a guide to the progress of the disease state - enable the investigator to modify the drug dosage accordingly.